Public water system profile

LANSING BOARD OF WATER & LIGHT

Explore available public water records for LANSING BOARD OF WATER & LIGHT (PWSID MI0003760). Find annual reports, results listed in those reports, official sources, and clear notes about what the records can and cannot show. This page does not show conditions at a specific tap.

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System Snapshot

Available system-level context

This snapshot shows the identity and context fields currently available for LANSING BOARD OF WATER & LIGHT (PWSID MI0003760). Read it with the source links and limitations below.

Last updated: August 9, 2026Data reviewed: August 9, 2026

System identity

PWSID: MI0003760
State: Michigan
Linked communities: Lansing
County context: Not listed in current record
System type: Community water system
Source water: Saginaw Aquifer groundwater from 112 wells.
Population served: Not listed in current record
Service connections: Not listed in current record
Latest reviewed report: 2025 report link found
Data updated: 2026-08-09

Read these as system-level fields from reviewed public records. Confirm provider and address-specific questions with official utility, city, state, or EPA sources.

Report-Listed Rows

Report-listed rows summarized from the latest reviewed report

31 report-listed rows are summarized for LANSING BOARD OF WATER & LIGHT. A listed row is not the same thing as a current advisory or household tap result.

Report year: 2025
Rows summarized: 31
Source tables represented: 7
Scope: Past reporting period

Report-row preview from the latest reviewed report for LANSING BOARD OF WATER & LIGHT
Substance and testing period	Reported value	Range in report	Limit or standard	Source table	Report-printed status
Total Coliform BacteriaTesting period: January 1 – December 31, 2025	2 Not listed in this summarized entryNumber Detected	Not listed in this summarized entry	Not listed in this summarized entry	Microbial ContaminantsPage 6Typical source, as printed: Naturally present in the environment	Violation?: No, as printed for this sample period
E. coliTesting period: January 1 – December 31, 2025	0 Not listed in this summarized entryNumber Detected	Not listed in this summarized entry	Not listed in this summarized entry	Microbial ContaminantsPage 6Typical source, as printed: Human or animal fecal waste	Violation?: No, as printed for this sample period
Haloacetic Acids (HAA5)Testing period: 2025 monitoring period	3.0 ppbHighest Running Annual Average	1.5 - 2.7	MCL: 60 ppb; MCLG: N/A	Disinfectants and Disinfection ByproductsPage 6Typical source, as printed: Byproduct of drinking water disinfection	Violation: No, as printed for this report period
Total Trihalomethanes (TTHMs)Testing period: 2025 monitoring period	3.9 ppbHighest Running Annual Average	2.5 - 3.9	MCL: 80 ppb; MCLG: N/A	Disinfectants and Disinfection ByproductsPage 6Typical source, as printed: Byproduct of drinking water disinfection	Violation: No, as printed for this report period
ChloraminesTesting period: January 1 - December 31, 2025; includes data from the prior year	2.0 PPMHighest Running Annual Average	0.50 - 2.8	MRDL: 4; MRDLG: 4	Disinfectants and Disinfection ByproductsPage 6Typical source, as printed: Water additive to control microbes	Violation?: No, as printed for this sample period
CopperTesting period: 2023Sites above action level0	0.0 PPM9 out of 10 Homes Were Below a Level of	0.0 - 0.0	AL: *1.3 at 90th Percentile; MCLG: 1.3	2023 Lead & Copper - Monitoring at Customer's TapPage 6Typical source, as printed: Corrosion of household plumbing systems; erosion of natural deposits	Violation?: No, as printed for this sample period
LeadTesting period: 2023Sites above action level0	0 PPB9 out of 10 Homes Were Below a Level of	0 - 3	AL: ** 15 at 90th Percentile; MCLG: 0	2023 Lead & Copper - Monitoring at Customer's TapPage 6Typical source, as printed: Lead service lines, corrosion of household plumbing including fittings & fixtures; erosion of natural deposits	Violation?: No, as printed for this sample period
FluorideTesting period: 07/01/24	0.72 PPMHighest Detected Level	0.64 - 0.72	MCL: 4; MCLG: 4	Substances Measured at the Water Conditioning PlantPage 7Typical source, as printed: Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories	Violation?: No, as printed for this sample period
BariumTesting period: 07/27/24	0.030 PPMHighest Detected Level	0.025 - 0.030	MCL: 2; MCLG: 2	Substances Measured at the Water Conditioning PlantPage 7Typical source, as printed: Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits	Violation?: No, as printed for this sample period
Gross AlphaTesting period: 07/11/23	2.37 pCi/LHighest Detected Level	0.230 - 2.37	MCL: 15; MCLG: 0	Substances Measured at the Water Conditioning PlantPage 7Typical source, as printed: Erosion of natural deposits	Violation?: No, as printed for this sample period
Radium 226 and 228Testing period: 07/15/25	*1.35+0.93 Wise WCP pCi/L**Highest Detected Level	N/A - N/A	MCL: 5; MCLG: 0	Substances Measured at the Water Conditioning PlantPage 7Typical source, as printed: Erosion of natural deposits	Violation?: No, as printed for this sample period
SodiumTesting period: 07/11/23	110 PPMHighest Detected Level	84 - 110	MCL: Not Established	Special Monitoring - Not RegulatedPage 7Typical source, as printed: Natural constituent of groundwater	Violation?: N/A, as printed for this sample period
ManganeseTesting period: March & Aug 2020	0.54 PPBAverage Detected Level	0.44 - 0.67	Not listed in this summarized entry	Unregulated Contaminants that were DetectedPage 7Typical source, as printed: Natural constituent of groundwater	The source labels this row an unregulated contaminant detected in historical monitoring.
HAA5Testing period: March & Aug 2020	2.25 PPBAverage Detected Level	1.74 - 3.13	Not listed in this summarized entry	Unregulated Contaminants that were DetectedPage 7Typical source, as printed: Byproduct of disinfection	The source labels this row an unregulated contaminant detected in historical monitoring.
HAABrTesting period: March & Aug 2020	0.31 PPBAverage Detected Level	0 - 0.46	Not listed in this summarized entry	Unregulated Contaminants that were DetectedPage 7Typical source, as printed: Byproduct of disinfection	The source labels this row an unregulated contaminant detected in historical monitoring.
HAA9Testing period: March & Aug 2020	2.56 PPBAverage Detected Level	2.20 - 3.46	Not listed in this summarized entry	Unregulated Contaminants that were DetectedPage 7Typical source, as printed: Byproduct of disinfection	The source labels this row an unregulated contaminant detected in historical monitoring.
LithiumTesting period: Feb & Aug 2024	12.56 PPBAverage Detected Level	6.16 - 19.6	Not listed in this summarized entry	Unregulated Contaminants that were DetectedPage 7Typical source, as printed: Natural constituent of groundwater	The source labels this row an unregulated contaminant detected in historical monitoring.
Calcium (as CaCO3)Testing period: Typical concentrations in the 2025 annual report	59 PPMYour Water Results Typical Concentration	48-72	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Magnesium (as CaCO3)Testing period: Typical concentrations in the 2025 annual report	42 PPMYour Water Results Typical Concentration	33-53	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
*Hardness (as CaCO3)**Testing period: Typical concentrations in the 2025 annual report	98 PPMYour Water Results Typical Concentration	89-120	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Carbonate (as CaCO3)Testing period: Typical concentrations in the 2025 annual report	19 PPMYour Water Results Typical Concentration	10-31	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Bicarbonate (as CaCO3)Testing period: Typical concentrations in the 2025 annual report	16 PPMYour Water Results Typical Concentration	6-34	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Total Alkalinity (as CaCO3)Testing period: Typical concentrations in the 2025 annual report	35 PPMYour Water Results Typical Concentration	27-49	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Iron at WCPTesting period: Typical concentrations in the 2025 annual report	0 PPMYour Water Results Typical Concentration	0	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Iron in Distribution*Testing period: Typical concentrations in the 2025 annual report	0.1 PPMYour Water Results Typical Concentration	0.1-0.28	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Sulfate*Testing period: Typical concentrations in the 2025 annual report	104 PPMYour Water Results Typical Concentration	86-135	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Chloride*Testing period: Typical concentrations in the 2025 annual report	83 PPMYour Water Results Typical Concentration	68-118	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Phosphate, Ortho (as P)Testing period: Typical concentrations in the 2025 annual report	0.35 PPMYour Water Results Typical Concentration	0.20-0.50	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
pHTesting period: Typical concentrations in the 2025 annual report	9.4 pH unitsYour Water Results Typical Concentration	9.1-9.8	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
TDSTesting period: Typical concentrations in the 2025 annual report	332 PPMYour Water Results Typical Concentration	278-410	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.
Conductivity*Testing period: Typical concentrations in the 2025 annual report	595 uS/cmYour Water Results Typical Concentration	510-770	Not listed in this summarized entry	Typical Analysis of Conditioned WaterPage 8	The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Total Coliform Bacteria

Range in report: Not listed in this summarized entry
Number Detected: 2 Not listed in this summarized entry
Testing period: January 1 – December 31, 2025
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: Violation?: No, as printed for this sample period

Report row

E. coli

Range in report: Not listed in this summarized entry
Number Detected: 0 Not listed in this summarized entry
Testing period: January 1 – December 31, 2025
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: Violation?: No, as printed for this sample period

Report row

Haloacetic Acids (HAA5)

Range in report: 1.5 - 2.7 ppb
Highest Running Annual Average: 3.0 ppb
Testing period: 2025 monitoring period
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: 60 ppb; MCLG: N/A
Report-printed status: Violation: No, as printed for this report period

Report row

Total Trihalomethanes (TTHMs)

Range in report: 2.5 - 3.9 ppb
Highest Running Annual Average: 3.9 ppb
Testing period: 2025 monitoring period
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: 80 ppb; MCLG: N/A
Report-printed status: Violation: No, as printed for this report period

Report row

Chloramines

Range in report: 0.50 - 2.8 PPM
Highest Running Annual Average: 2.0 PPM
Testing period: January 1 - December 31, 2025; includes data from the prior year
Sites above action level: Not applicable to this summarized entry
Limit or standard: MRDL: 4; MRDLG: 4
Report-printed status: Violation?: No, as printed for this sample period

Report row

Copper

Range in report: 0.0 - 0.0 PPM
9 out of 10 Homes Were Below a Level of: 0.0 PPM
Testing period: 2023
Sites above action level: 0
Limit or standard: AL: *1.3 at 90th Percentile; MCLG: 1.3
Report-printed status: Violation?: No, as printed for this sample period

Report row

Lead

Range in report: 0 - 3 PPB
9 out of 10 Homes Were Below a Level of: 0 PPB
Testing period: 2023
Sites above action level: 0
Limit or standard: AL: ** 15 at 90th Percentile; MCLG: 0
Report-printed status: Violation?: No, as printed for this sample period

Report row

Fluoride

Range in report: 0.64 - 0.72 PPM
Highest Detected Level: 0.72 PPM
Testing period: 07/01/24
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: 4; MCLG: 4
Report-printed status: Violation?: No, as printed for this sample period

Report row

Barium

Range in report: 0.025 - 0.030 PPM
Highest Detected Level: 0.030 PPM
Testing period: 07/27/24
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: 2; MCLG: 2
Report-printed status: Violation?: No, as printed for this sample period

Report row

Gross Alpha

Range in report: 0.230 - 2.37 pCi/L
Highest Detected Level: 2.37 pCi/L
Testing period: 07/11/23
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: 15; MCLG: 0
Report-printed status: Violation?: No, as printed for this sample period

Report row

Radium 226 and 228

Range in report: N/A - N/A
Highest Detected Level: 1.35+0.93 Wise WCP* pCi/L
Testing period: 07/15/25
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: 5; MCLG: 0
Report-printed status: Violation?: No, as printed for this sample period

Report row

Sodium

Range in report: 84 - 110 PPM
Highest Detected Level: 110 PPM
Testing period: 07/11/23
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: Not Established
Report-printed status: Violation?: N/A, as printed for this sample period

Report row

Manganese

Range in report: 0.44 - 0.67 PPB
Average Detected Level: 0.54 PPB
Testing period: March & Aug 2020
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this row an unregulated contaminant detected in historical monitoring.

Report row

HAA5

Range in report: 1.74 - 3.13 PPB
Average Detected Level: 2.25 PPB
Testing period: March & Aug 2020
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this row an unregulated contaminant detected in historical monitoring.

Report row

HAABr

Range in report: 0 - 0.46 PPB
Average Detected Level: 0.31 PPB
Testing period: March & Aug 2020
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this row an unregulated contaminant detected in historical monitoring.

Report row

HAA9

Range in report: 2.20 - 3.46 PPB
Average Detected Level: 2.56 PPB
Testing period: March & Aug 2020
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this row an unregulated contaminant detected in historical monitoring.

Report row

Lithium

Range in report: 6.16 - 19.6 PPB
Average Detected Level: 12.56 PPB
Testing period: Feb & Aug 2024
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this row an unregulated contaminant detected in historical monitoring.

Report row

Calcium (as CaCO3)

Range in report: 48-72 PPM
Your Water Results Typical Concentration: 59 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Magnesium (as CaCO3)

Range in report: 33-53 PPM
Your Water Results Typical Concentration: 42 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Hardness* (as CaCO3)

Range in report: 89-120 PPM
Your Water Results Typical Concentration: 98 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Carbonate (as CaCO3)

Range in report: 10-31 PPM
Your Water Results Typical Concentration: 19 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Bicarbonate (as CaCO3)

Range in report: 6-34 PPM
Your Water Results Typical Concentration: 16 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Total Alkalinity (as CaCO3)

Range in report: 27-49 PPM
Your Water Results Typical Concentration: 35 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Iron at WCP

Range in report: 0 PPM
Your Water Results Typical Concentration: 0 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Iron in Distribution*

Range in report: 0.1-0.28 PPM
Your Water Results Typical Concentration: 0.1 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Sulfate*

Range in report: 86-135 PPM
Your Water Results Typical Concentration: 104 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Chloride*

Range in report: 68-118 PPM
Your Water Results Typical Concentration: 83 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Phosphate, Ortho (as P)

Range in report: 0.20-0.50 PPM
Your Water Results Typical Concentration: 0.35 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

pH

Range in report: 9.1-9.8 pH units
Your Water Results Typical Concentration: 9.4 pH units
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

TDS

Range in report: 278-410 PPM
Your Water Results Typical Concentration: 332 PPM
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Report row

Conductivity*

Range in report: 510-770 uS/cm
Your Water Results Typical Concentration: 595 uS/cm
Testing period: Typical concentrations in the 2025 annual report
Sites above action level: Not applicable to this summarized entry
Limit or standard: Not listed in this summarized entry
Report-printed status: The source labels this as a typical concentration and range that can vary with wells, season, and distribution area; it is not treated as an address-level result.

Source report notes

Source: Lansing Board of Water & Light 2025 Annual Water Quality Report. Retrieved 2026-09-17.

Applies to: Total Coliform Bacteria, E. coli, Chloramines, Copper, Lead, Fluoride, Barium, Gross Alpha, Radium 226 and 228, Sodium, Manganese, HAA5, HAABr, HAA9, Lithium, Calcium (as CaCO3), Magnesium (as CaCO3), Hardness* (as CaCO3), Carbonate (as CaCO3), Bicarbonate (as CaCO3), Total Alkalinity (as CaCO3), Iron at WCP, Iron in Distribution*, Sulfate*, Chloride*, Phosphate, Ortho (as P), pH, TDS, Conductivity*
Printed values, units, ranges, dates, criteria, labels, status cells, and inconsistencies remain historical annual-report evidence and do not establish current compliance, a current notice or advisory, water safety, exposure, address-level service, service-line material, or conditions at a particular tap.
Applies to: Haloacetic Acids (HAA5)
0 ppb, range 1.5 - 2.7 ppb, MCL 60 ppb, MCLG N/A, source-printed Violation No. Annual-report values describe only the cited report period. A reported measure, range endpoint, MCL, source-printed violation field, service-line inventory, special-monitoring statement, and provider wording are distinct concepts. These fields are not a current compliance feed, advisory determination, address-level result, household-tap result, exposure conclusion, or safety conclusion. A reviewed city relationship does not identify the provider for an address or prove exclusive service.
Applies to: Total Trihalomethanes (TTHMs)
9 ppb, range 2.5 - 3.9 ppb, MCL 80 ppb, MCLG N/A, source-printed Violation No. Annual-report values describe only the cited report period. A reported measure, range endpoint, MCL, source-printed violation field, service-line inventory, special-monitoring statement, and provider wording are distinct concepts. These fields are not a current compliance feed, advisory determination, address-level result, household-tap result, exposure conclusion, or safety conclusion. A reviewed city relationship does not identify the provider for an address or prove exclusive service.

Review the linked source report for definitions, footnotes, and official wording.

Your provider

Confirm who supplies your address

A Lansing mailing address does not establish the water provider. Check the water portion of your bill, or ask the landlord or property manager if water is included in rent. BWL also provides other utility services, so an electric account alone does not confirm a BWL water connection. For an address-specific answer, contact BWL customer service at 517-702-6006 and ask who operates the water account and which public water system supplies it.

BWL’s water-service Rule 3.2 covers Lansing and several surrounding governmental jurisdictions, with surrounding service governed by contracts. Service may be impractical at particular properties; connections across another owner’s parcel can require an existing easement. BWL determines the supplying main when more than one main could serve a property. These are service-availability rules, not a property-level boundary map.

The 2025 report distinguishes 166,000 people served directly and 40,450 people served wholesale. Its 2021 report identifies Delta Township and Westside Water in its discussion of distribution to wholesale customers. A purchasing utility can have its own system, distribution monitoring and customer notices. Use the provider named on your water bill to find those local records rather than treating BWL’s plant results as the whole account history.

BWL water-service rules, Rule 3.2, printed page 73, approved July 22, 2025 and effective October 1, 2025; 2025 report, page 3; 2021 report, page 2; BWL contact information.

Report archive

What the earlier reports add

BWL’s published archive contains annual reports for 2020–2025. Report years and water sampling years differ: the 2021 and 2022 reports repeat 2020 lead and copper water sampling; the 2024 and 2025 reports repeat 2023 water sampling. Older unregulated-contaminant results also recur. Repeated publication does not establish a new test or a trend.

A monitoring notice in the 2020 report

The report records a TTHM monitoring violation for May 1–31, 2020. Its table lists two required water samples per three months and zero water samples taken. The accompanying explanation says water samples were collected but were not analyzed within the required holding time; subsequent water samples were collected in August. This is a monitoring issue, not a reported TTHM concentration above its limit. The notice’s “not an emergency” and no-action statements describe that historical notice, not present conditions.

2020 report, page 7: monitoring table and explanation.

Lead water sampling needs both the percentile and the range

The 2020 lead results show a 90th percentile of 2 PPB, a range of 0–18 PPB and one water sample above the printed 15 PPB action level. The report says one of 51 homes measured 18 PPB; a new water heater had been installed the preceding day and, according to BWL, might have dislodged a particle. A resample measured 2 PPB. The report gives 0–2.2 PPB for the other homes. That explanation is attributed to BWL; it does not establish the cause or describe an individual home today.

The 2023 water sampling subsequently reported a 90th percentile of 0 PPB, a range of 0–3 PPB and zero water samples above the printed action level. Those statistics do not mean every household has zero lead.

2020 report, page 7; 2023 report, page 7.

Keep source differences visible

The 2022 radium table prints “0.840.51” in its highest-result cell and “0.84+0.51 (Wise WCP)*” in its range cell. These are preserved separately below. The accompanying note says no radium was detected at Dye WCP in July 2022. The 2023 treatment narrative describes about 80% hardness removal while its process diagram says 85%; these are different descriptions in the same report, not interchangeable measurements.

2022 report, printed pages 6–7; 2023 report, pages 4 and 9.

The Erickson investigation concerns a different groundwater context

The 2021 report discusses BWL’s investigation of groundwater impacts associated with coal-ash impoundments at Erickson Power Station. It says initial testing found elevated boron outside the property line and describes work to determine its source, noting that boron can occur naturally and can be associated with coal ash. The same letter states that water produced and distributed by BWL, including Delta Township and Westside Water, did not have elevated boron. These are attributed statements from that report; the environmental investigation is not a drinking-water sample row or a current determination about the site or a household tap.

2021 report, page 2: Erickson groundwater investigation and distribution-system distinction.

Open a year to read its reported records. Dates, units, qualifiers and blank cells belong to that source. A blank is displayed as “Blank in source”; it is not zero, not detected or not applicable. In the 2022 booklet, PDF page numbers refer to the physical spread.

2020 report records

Open the official 2020 report

Reading this report’s tables

The BWL conducts frequent tests of the water and the following tables list parameters, even in the smallest traces, which may be associated with health, aesthetics or no established standards. Drinking water may reasonably be expected to contain at least small amounts of some parameters and this does not necessarily indicate a health risk. These tables contain the name, the highest level allowed if regulated, the ideal goals for public health if established, the amount detected and the usual sources of such parameter. The tables do not list the hundreds of parameters for which the BWL tested but did not detect a presence. Unless otherwise noted, the data presented in this table is from testing done January 1 – December 31, 2020. The BWL can monitor for certain parameters less often than once per year because the concentrations are not expected to vary significantly from year to year. While all the data are representative of the BWL’s water quality, some results are more than one year old.

AL: Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
L1: Level 1 Assessment: A study of the water supply to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.
L2: Level 2 Assessment: A very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.
MCL: Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
MCLG: Maximum Contaminant Level Goal: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
MRDL: Maximum Residual Disinfectant Level: The highest level of a disinfectant allowed in drinking water. There is convincing evidence that the addition of a disinfectant is necessary for control of microbial contaminants.
MRDLG: Maximum Residual Disinfectant Level Goal: The level of a disinfectant in drinking water below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contamination.
N/A: Not Applicable
ND: Not detectable at testing limit
pCi/L: Picocuries per liter (a measure of radioactivity)
PPB: Parts Per Billion, or micrograms per liter (ug/l) (equivalent to one penny in $10,000,000).
PPM: Parts Per Million, or milligrams per liter (mg/l) (equivalent to one penny in $10,000).

Definitions reproduced from PDF page 5; they describe this report’s terminology and historical regulatory context.

Material table notes

Lead and copper table action-level notes: The source notes specify that 9 out of 10 tested homes must show a concentration equal to or lower than 1.3 parts per million for copper and 15 parts per billion for lead. These explain the action-level framework printed in this historical report, not a household safety threshold.
2020 lead sampling footnote: One home out of 51 sampled showed 18 ppb. The customer had installed a new water heater the day before sampling; BWL says this may have dislodged a lead particle. The resample was 2 ppb. All other homes sampled during compliance were between 0 and 2.2 ppb. Later publication of this note does not represent a new sampling event.
Typical-analysis seasonal note: The starred parameters typically reach the high end of their ranges during high-demand periods in June, July and August. Preserve the asterisks on the individual rows; this note does not turn every typical-analysis range into a regulatory limit.

Microbial Contaminants

2020 report · PDF page 6

Total Coliform Bacteria

Number Detected: 1
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Naturally present in the environment
Violation?: No

E. coli

Number Detected: 0
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Human or animal fecal waste
Violation?: No

Regulated Contaminant

2020 report · PDF page 6

Haloacetic Acids (HAA5)

Unit: PPB
MCL: 60
MCLG: N/A
Highest Average Detected Level: 2.5
Range of Detected Levels: 1.3 to 3.2
Major Sources: By-product of drinking water disinfection
Violation?: No

Total Trihalomethanes (TTHMs)

Unit: PPB
MCL: 80
MCLG: N/A
Highest Average Detected Level: 3.4
Range of Detected Levels: 2.6 to 4.1
Major Sources: By-product of drinking water disinfection
Violation?: No

Chloramines

Unit: PPM
MCL: MRDL 4
MCLG: MRDLG 4
Highest Average Detected Level: 1.8
Range of Detected Levels: 0.29 to 3.1
Major Sources: Water additive to control microbes
Violation?: No

Regulated Contaminant

2020 report · PDF page 6

Fluoride

Unit: PPM
MCL: 4
MCLG: 4
Highest Detected Level: 0.61
Range: 0.54 to 0.61
Date Tested: 7/9/20
Major Sources: Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories.
Violation?: No

Radioactive Contaminant

2020 report · PDF page 6

Radium 226 and 228

Unit: pCi/L
MCL: 5
MCLG: 0
Highest Detected Level: 1.95 +0.44
Range: 0.84+0.51 to 1.95+0.44
Date Tested: 7/7/16
Major Sources: Erosion of natural deposits.
Violation?: No

Special Monitoring (Not Regulated)

2020 report · PDF page 6

Sodium

Unit: PPM
MCL: Not Established
Highest Detected Level: 100
Range: 99 to 100
Date Tested: 7/9/20
Major Sources: Natural constituent of groundwater.
Violation?: N/A

Contaminant Subject to AL

2020 report · PDF page 7

Copper

Unit: PPM
AL: *1.3 at 90th percentile
MCLG: 1.3
9 out of 10 homes were below a level of:: 0
# of samples above the action level:: 0
Range of Individual Sample Results:: 0.0 to 0.0
Major Sources: Corrosion of household plumbing systems; erosion of natural deposits.
Violation?: No

Lead

Unit: PPB
AL: **15 at 90th percentile
MCLG: 0
9 out of 10 homes were below a level of:: 2
# of samples above the action level:: 1
Range of Individual Sample Results:: 0 to 18***
Major Sources: Lead service lines, corrosion of household plumbing including fittings and fixtures; Erosion of natural deposits.
Violation?: No

Contaminant

2020 report · PDF page 7

TTHM

Required Sampling Frequency: 2 Samples/3 Months
Number of Samples Taken: 0
When All Samples Should Have Been Collected: May 1, 2020 - May 31, 2020
Date Additional Samples Will Be Collected: Aug 1, 2020 - Aug 31, 2020

Unregulated Contaminants

2020 report · PDF page 8

Chromium

Unit: PPB
Average Detected Level: 0.2
Range: 0.2-0.3
Date Tested: Feb & Aug 2015
Major Sources: Natural constituent of groundwater

Molybdenum

Unit: PPB
Average Detected Level: 1.1
Range: 0-1.2
Date Tested: Feb & Aug 2015
Major Sources: Industrial activities; naturally occurring sources

Strontium

Unit: PPB
Average Detected Level: 166
Range: 120-210
Date Tested: Feb & Aug 2015
Major Sources: Industrial activities; naturally occurring sources

Vanadium

Unit: PPB
Average Detected Level: 0.3
Range: 0.2-0.4
Date Tested: Feb & Aug 2015
Major Sources: Industrial activities; naturally occurring sources

Chromium Hexavalent

Unit: PPB
Average Detected Level: 0.2
Range: 0.14-0.24
Date Tested: Feb & Aug 2015
Major Sources: Industrial activities; naturally occurring sources

Chlorate

Unit: PPB
Average Detected Level: 174
Range: 32-330
Date Tested: Feb & Aug 2015
Major Sources: By-product of disinfection

1,4-Dioxane

Unit: PPB
Average Detected Level: 0.14
Range: 0.14-0.14
Date Tested: Feb & Aug 2015
Major Sources: Industrial activities and landfills

Manganese

Unit: PPB
Average Detected Level: 0.54
Range: 0.44-0.67
Date Tested: Mar & Aug 2020
Major Sources: Natural constituent of groundwater

HAA5

Unit: PPB
Average Detected Level: 2.25
Range: 1.74-3.133
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

HAABr

Unit: PPB
Average Detected Level: 0.31
Range: 0-0.46
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

HAA9

Unit: PPB
Average Detected Level: 2.56
Range: 2.20-3.46
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

Parameter

2020 report · PDF page 11

Calcium (as CaCO3)

Units: PPM
Typical Concentration: 60
Range: 40-70

Magnesium (as CaCO3)

Units: PPM
Typical Concentration: 42
Range: 33-58

Hardness* (as CaCO3)

Units: PPM
Typical Concentration: 98
Range: 86-130

Carbonate (as CaCO3)

Units: PPM
Typical Concentration: 22
Range: 17-27

Bicarbonate (as CaCO3)

Units: PPM
Typical Concentration: 16
Range: 13-23

Total Alkalinity (as CaCO3)

Units: PPM
Typical Concentration: 35
Range: 31-51

Iron*

Units: PPM
Typical Concentration: 0.1
Range: 0.1-0.25

Sulfate*

Units: PPM
Typical Concentration: 104
Range: 80-170

Chloride*

Units: PPM
Typical Concentration: 70
Range: 50-100

Phosphate, Ortho (as P)

Units: PPM
Typical Concentration: 0.3
Range: 0.1-0.6

pH

Units: pH units
Typical Concentration: 9.4
Range: 9.0-10

Total Dissolved Solids

Units: PPM
Typical Concentration: 275
Range: 250-300

Conductivity*

Units: uS/cm
Typical Concentration: 580
Range: 450-730

2021 report records

Open the official 2021 report

Reading this report’s tables

The BWL conducts frequent tests of the water and the following tables list parameters, even in the smallest traces, which may be associated with health, aesthetics, or no established standards. Drinking water may reasonably be expected to contain at least small amounts of some parameters and this does not necessarily indicate a health risk. These tables contain the name, the highest level allowed if regulated, the ideal goals for public health if established, the amount detected and the usual sources of such parameter. The tables do not list the hundreds of parameters for which the BWL tested but did not detect a presence. Unless otherwise noted, the data presented in this table is from testing done January 1 – December 31, 2021. The BWL can monitor for certain parameters less often than once per year because the concentrations are not expected to vary significantly from year to year. While all the data are representative of the BWL’s water quality, some results are more than one year old.

AL: Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
L1: Level 1 Assessment: A study of the water supply to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.
L2: Level 2 Assessment: A very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.
MCL: Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
MCLG: Maximum Contaminant Level Goal: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
MRDL: Maximum Residual Disinfectant Level: The highest level of a disinfectant allowed in drinking water. There is convincing evidence that the addition of a disinfectant is necessary for control of microbial contaminants.
MRDLG: Maximum Residual Disinfectant Level Goal: The level of a disinfectant in drinking water below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contamination.
N/A: Not Applicable
ND: Not detectable at testing limit
pCi/L: Picocuries per liter (a measure of radioactivity)
PPB: Parts Per Billion, or micrograms per liter (ug/l) (equivalent to one penny in $10,000,000).
PPM: Parts Per Million, or milligrams per liter (mg/l) (equivalent to one penny in $10,000).

Definitions reproduced from PDF page 5; they describe this report’s terminology and historical regulatory context.

Material table notes

Lead and copper table action-level notes: The source notes specify that 9 out of 10 tested homes must show a concentration equal to or lower than 1.3 parts per million for copper and 15 parts per billion for lead. These explain the action-level framework printed in this historical report, not a household safety threshold.
2020 lead sampling footnote: One home out of 51 sampled showed 18 ppb. The customer had installed a new water heater the day before sampling; BWL says this may have dislodged a lead particle. The resample was 2 ppb. All other homes sampled during compliance were between 0 and 2.2 ppb. Later publication of this note does not represent a new sampling event.
Typical-analysis seasonal note: The starred parameters typically reach the high end of their ranges during high-demand periods in June, July and August. Preserve the asterisks on the individual rows; this note does not turn every typical-analysis range into a regulatory limit.

Microbial Contaminants

2021 report · PDF page 6

Total Coliform Bacteria

Number Detected: 1
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Naturally present in the environment
Violation?: No

E. coli

Number Detected: 0
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Human or animal fecal waste
Violation?: No

Regulated Contaminant

2021 report · PDF page 6

Haloacetic Acids (HAA5)

Unit: PPB
MCL: 60
MCLG: N/A
Highest Average Detected Level: 2.6
Range of Detected Levels: 1.4 to 4.1
Major Sources: By-product of drinking water disinfection
Violation?: No

Total Trihalomethanes (TTHMs)

Unit: PPB
MCL: 80
MCLG: N/A
Highest Average Detected Level: 4.2
Range of Detected Levels: 2.9 to 5.5
Major Sources: By-product of drinking water disinfection
Violation?: No

Chloramines

Unit: PPM
MCL: MRDL 4
MCLG: MRDLG 4
Highest Average Detected Level: 2.1
Range of Detected Levels: 0.44 to 2.8
Major Sources: Water additive to control microbes
Violation?: No

Regulated Contaminant

2021 report · PDF page 6

Fluoride

Unit: PPM
MCL: 4
MCLG: 4
Highest Detected Level: 0.62
Range: 0.20 to 0.62
Date Tested: 7/27/21
Major Sources: Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories.
Violation?: No

Radioactive Contaminant

2021 report · PDF page 6

Radium 226 and 228

Unit: pCi/L
MCL: 5
MCLG: 0
Highest Detected Level: 1.95 +0.44
Range: 0.84+0.51 to 1.95+0.44
Date Tested: 7/7/16
Major Sources: Erosion of natural deposits.
Violation?: No

Special Monitoring (Not Regulated)

2021 report · PDF page 6

Sodium

Unit: PPM
MCL: Not Established
Highest Detected Level: 100
Range: 99 to 100
Date Tested: 7/9/20
Major Sources: Natural constituent of groundwater.
Violation?: N/A

Contaminant Subject to AL

2021 report · PDF page 7

Copper

Unit: PPM
AL: *1.3 at 90th percentile
MCLG: 1.3
9 out of 10 homes were below a level of:: 0
# of samples above the action level:: 0
Range of Individual Sample Results:: 0.0 to 0.0
Major Sources: Corrosion of household plumbing systems; erosion of natural deposits.
Violation?: No

Lead

Unit: PPB
AL: **15 at 90th percentile
MCLG: 0
9 out of 10 homes were below a level of:: 2
# of samples above the action level:: 1
Range of Individual Sample Results:: 0 to 18***
Major Sources: Lead service lines, corrosion of household plumbing including fittings and fixtures; Erosion of natural deposits.
Violation?: No

Unregulated Contaminants

2021 report · PDF page 7

Manganese

Unit: PPB
Average Detected Level: 0.54
Range: 0.44-0.67
Date Tested: Mar & Aug 2020
Major Sources: Natural constituent of groundwater

HAA5

Unit: PPB
Average Detected Level: 2.25
Range: 1.74-3.133
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

HAABr

Unit: PPB
Average Detected Level: 0.31
Range: 0-0.46
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

HAA9

Unit: PPB
Average Detected Level: 2.56
Range: 2.20-3.46
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

Parameter

2021 report · PDF page 11

Calcium (as CaCO3)

Units: PPM
Typical Concentration: 60
Range: 40-70

Magnesium (as CaCO3)

Units: PPM
Typical Concentration: 42
Range: 33-58

Hardness* (as CaCO3)

Units: PPM
Typical Concentration: 98
Range: 86-130

Carbonate (as CaCO3)

Units: PPM
Typical Concentration: 22
Range: 17-27

Bicarbonate (as CaCO3)

Units: PPM
Typical Concentration: 16
Range: 13-23

Total Alkalinity (as CaCO3)

Units: PPM
Typical Concentration: 35
Range: 31-51

Iron*

Units: PPM
Typical Concentration: 0.1
Range: 0.1-0.25

Sulfate*

Units: PPM
Typical Concentration: 104
Range: 80-170

Chloride*

Units: PPM
Typical Concentration: 70
Range: 50-100

Phosphate, Ortho (as P)

Units: PPM
Typical Concentration: 0.3
Range: 0.1-0.6

pH

Units: pH units
Typical Concentration: 9.4
Range: 9.0-10

Conductivity*

Units: uS/cm
Typical Concentration: 580
Range: 450-730

2022 report records

Open the official 2022 report

Reading this report’s tables

The BWL conducts frequent tests of the water and the following tables list those parameters and associated results of the testing. Drinking water may reasonably be expected to contain at least small amounts of some parameters and this does not necessarily indicate a health risk. These tables contain the name, the highest level allowed if regulated, the ideal goals for public health if established, the amount detected and the usual sources of such parameter. The tables do not list the hundreds of parameters for which the BWL tested but did not detect a presence. Unless otherwise noted, the data presented in this table is from testing done January 1 – December 31, 2022. The BWL can monitor for certain parameters less often than once per year because the concentrations are not expected to vary significantly from year to year. While all the data are representative of the BWL’s water quality, some results are more than one year old.

AL: Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
L1: Level 1 Assessment: A study of the water supply to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.
L2: Level 2 Assessment: A very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.
MCL: Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
MCLG: Maximum Contaminant Level Goal: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
MRDL: Maximum Residual Disinfectant Level: The highest level of a disinfectant allowed in drinking water. There is convincing evidence that the addition of a disinfectant is necessary for control of microbial contaminants.
MRDLG: Maximum Residual Disinfectant Level Goal: The level of a disinfectant in drinking water below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contamination.
N/A: Not Applicable
ND: Not detectable at testing limit
pCi/L: Picocuries per liter (a measure of radioactivity)
PPB: Parts Per Billion, or micrograms per liter (ug/l) (equivalent to one penny in $10,000,000).
PPM: Parts Per Million, or milligrams per liter (mg/l) (equivalent to one penny in $10,000).

Definitions reproduced from PDF page 3; they describe this report’s terminology and historical regulatory context.

Material table notes

Lead and copper table action-level notes: The source notes specify that 9 out of 10 tested homes must show a concentration equal to or lower than 1.3 parts per million for copper and 15 parts per billion for lead. These explain the action-level framework printed in this historical report, not a household safety threshold.
2020 lead sampling footnote: One home out of 51 sampled showed 18 ppb. The customer had installed a new water heater the day before sampling; BWL says this may have dislodged a lead particle. The resample was 2 ppb. All other homes sampled during compliance were between 0 and 2.2 ppb. Later publication of this note does not represent a new sampling event.
Radium source note: The report identifies the listed result with Wise WCP. Dye WCP was sampled in July 2022 and no radium was detected. This separate plant/date note must not be applied as a nondetect finding to the printed Wise result.
Typical-analysis seasonal note: The starred parameters typically reach the high end of their ranges during high-demand periods in June, July and August. Preserve the asterisks on the individual rows; this note does not turn every typical-analysis range into a regulatory limit.
Typical-analysis location labels: WCP means water conditioning plant. Iron at WCP and iron on distribution are separate rows with distinct sampling-location labels, not duplicate observations to combine.

Contaminant Subject to AL

2022 report · PDF page 4

Copper

Unit: PPM
AL: *1.3 at 90th percentile
MCLG: 1.3
9 out of 10 homes were below a level of:: 0
# of samples above the action level:: 0
Range of Individual Sample Results:: 0.0 to 0.0
Major Sources: Corrosion of household plumbing systems; erosion of natural deposits.
Violation?: No

Lead

Unit: PPB
AL: **15 at 90th percentile
MCLG: 0
9 out of 10 homes were below a level of:: 2
# of samples above the action level:: 1
Range of Individual Sample Results:: 0 to 18***
Major Sources: Lead service lines, corrosion of household plumbing including fittings and fixtures; Erosion of natural deposits.
Violation?: No

Microbial Contaminants

2022 report · PDF page 4

Total Coliform Bacteria

Number Detected: 0
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Naturally present in the environment
Violation?: No

E. coli

Number Detected: 0
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Human or animal fecal waste
Violation?: No

Regulated Contaminant

2022 report · PDF page 4

Haloacetic Acids (HAA5)

Unit: PPB
MCL: 60
MCLG: N/A
Highest Average Detected Level: 3.0
Range of Detected Levels: 1.9 to 3.1
Major Sources: By-product of drinking water disinfection
Violation?: No

Total Trihalomethanes (TTHMs)

Unit: PPB
MCL: 80
MCLG: N/A
Highest Average Detected Level: 4.8
Range of Detected Levels: 3.2 to 5.0
Major Sources: By-product of drinking water disinfection
Violation?: No

Chloramines

Unit: PPM
MCL: MRDL 4
MCLG: MRDLG 4
Highest Average Detected Level: 2.1
Range of Detected Levels: 0.44 to 2.8
Major Sources: Water additive to control microbes
Violation?: No

Unregulated Contaminants

2022 report · PDF page 4

Manganese

Unit: PPB
Average Detected Level: 0.54
Range: 0.44-0.67
Date Tested: Mar & Aug 2020
Major Sources: Natural constituent of groundwater

HAA5

Unit: PPB
Average Detected Level: 2.25
Range: 1.74-3.133
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

HAABr

Unit: PPB
Average Detected Level: 0.31
Range: 0-0.46
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

HAA9

Unit: PPB
Average Detected Level: 2.56
Range: 2.20-3.46
Date Tested: Mar & Aug 2020
Major Sources: By-product of disinfection

Regulated Contaminant

2022 report · PDF page 4

Fluoride

Unit: PPM
MCL: 4
MCLG: 4
Highest Detected Level: 0.62
Range: <0.20 to 0.62
Date Tested: 7/27/21
Major Sources: Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories.
Violation?: No

Radioactive Contaminant

2022 report · PDF page 4

Radium 226 and 228

Unit: pCi/L
MCL: 5
MCLG: 0
Highest Detected Level: 0.840.51
Range: 0.84+0.51 (Wise WCP)*
Date Tested: 7/7/16
Major Sources: Erosion of natural deposits.
Violation?: No

Special Monitoring (Not Regulated)

2022 report · PDF page 4

Sodium

Unit: PPM
MCL: Not Established
Highest Detected Level: 100
Range: 99 to 100
Date Tested: 7/9/20
Major Sources: Natural constituent of groundwater.
Violation?: N/A

Parameter

2022 report · PDF page 5

Calcium (as CaCO3)

Units: PPM
Typical Concentration: 60
Range: 40-70

Magnesium (as CaCO3)

Units: PPM
Typical Concentration: 42
Range: 33-58

Hardness* (as CaCO3)

Units: PPM
Typical Concentration: 98
Range: 86-130

Carbonate (as CaCO3)

Units: PPM
Typical Concentration: 22
Range: 17-27

Bicarbonate (as CaCO3)

Units: PPM
Typical Concentration: 16
Range: 13-23

Total Alkalinity (as CaCO3)

Units: PPM
Typical Concentration: 35
Range: 31-51

Iron at WCP*

Units: PPM
Typical Concentration: 0
Range: 0

Iron on Distribution*

Units: PPM
Typical Concentration: 0.1
Range: 0.1-0.28

Sulfate*

Units: PPM
Typical Concentration: 104
Range: 80-170

Chloride*

Units: PPM
Typical Concentration: 70
Range: 50-100

Phosphate, Ortho (as P)

Units: PPM
Typical Concentration: 0.3
Range: 0.1-0.6

pH

Units: pH units
Typical Concentration: 9.4
Range: 9.0-10

TDS

Units: PPM
Typical Concentration: 332
Range: 278-410

Conductivity*

Units: uS/cm
Typical Concentration: 580
Range: 450-730

2023 report records

Open the official 2023 report

Reading this report’s tables

BWL conducts frequent tests of our water and the following tables list those parameters and associated results of this testing. Drinking water may reasonably be expected to contain at least small amounts of some parameters and this does not necessarily indicate a health risk. These tables contain the name, the highest level allowed if regulated, the ideal goals for public health if established, the amount detected and the usual sources of such parameters. The tables don’t list the hundreds of parameters for which the BWL tested but didn’t detect a presence. Unless otherwise noted, the data presented in this table is from testing done from January 1 – December 31, 2023. The BWL may reduce the monitoring frequency of certain parameters less often than once per year because the concentrations are not expected to vary significantly from year to year. While all the data are representative of the BWL’s water quality, some results are more than one year old.

AL: Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
L1: Level 1 Assessment: A study of the water supply to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.
L2: Level 2 Assessment: A very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.
MCL: Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
MCLG: Maximum Contaminant Level Goal: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
MRDL: Maximum Residual Disinfectant Level: The highest level of a disinfectant allowed in drinking water. There is convincing evidence that the addition of a disinfectant is necessary for control of microbial contaminants.
MRDLG: Maximum Residual Disinfectant Level Goal: The level of a disinfectant in drinking water below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contamination.
N/A: Not Applicable
ND: Not detectable at testing limit
pCi/L: Picocuries per liter (a measure of radioactivity)
PPB: Parts Per Billion, or micrograms per liter (ug/l) (equivalent to one penny in $10,000,000).
PPM: Parts Per Million, or milligrams per liter (mg/l) (equivalent to one penny in $10,000).

Definitions reproduced from PDF page 5; they describe this report’s terminology and historical regulatory context.

Material table notes

Lead and copper table action-level notes: The source notes specify that 9 out of 10 tested homes must show a concentration equal to or lower than 1.3 parts per million for copper and 15 parts per billion for lead. These explain the action-level framework printed in this historical report, not a household safety threshold.
Radium source note: The report identifies the listed result with Wise WCP. Dye WCP was sampled in July 2022 and no radium was detected. This separate plant/date note must not be applied as a nondetect finding to the printed Wise result.
Typical-analysis seasonal note: The starred parameters typically reach the high end of their ranges during high-demand periods in June, July and August. Preserve the asterisks on the individual rows; this note does not turn every typical-analysis range into a regulatory limit.
Typical-analysis location labels: WCP means water conditioning plant. Iron at WCP and iron on distribution are separate rows with distinct sampling-location labels, not duplicate observations to combine.

Microbial Contaminants

2023 report · PDF page 6

Total Coliform Bacteria

Number Detected: 0
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Naturally present in the environment
Violation?: No

E. coli

Number Detected: 0
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Human or animal fecal waste
Violation?: No

Regulated Contaminant

2023 report · PDF page 6

Haloacetic Acids (HAA5)

Unit: PPB
MCL: 60
MCLG: N/A
Highest Average Detected Level: 3.0
Range of Detected Levels: 1.4 to 4.5
Major Sources: Byproduct of drinking water disinfection
Violation?: No

Total Trihalomethanes (TTHMs)

Unit: PPB
MCL: 80
MCLG: N/A
Highest Average Detected Level: 4.8
Range of Detected Levels: 3.0 to 5.0
Major Sources: Byproduct of drinking water disinfection
Violation?: No

Chloramines

Unit: PPM
MCL: MRDL 4
MCLG: MRDLG 4
Highest Average Detected Level: 2.2
Range of Detected Levels: 0.43 to 2.8
Major Sources: Water additive to control microbes
Violation?: No

Regulated Contaminant

2023 report · PDF page 6

Fluoride

Unit: PPM
MCL: 4
MCLG: 4
Highest Detected Level: 0.62
Range: <0.20 to 0.62
Date Tested: 7/27/21
Major Sources: Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories.
Violation?: No

Barium

Unit: PPM
MCL: 2
MCLG: 2
Highest Detected Level: 0.030
Range: 0.025- 0.030
Date Tested: 7/27/21
Major Sources: Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits
Violation?: No

Radioactive Contaminant

2023 report · PDF page 6

Gross Alpha

Unit: pCi/L
MCL: 15
MCLG: 0
Highest Detected Level: 2.37
Range: 0.230-2.37
Date Tested: 7/11/23
Major Sources: Erosion of natural deposits.
Violation?: No

Radium 226 and 228

Unit: pCi/L
MCL: 5
MCLG: 0
Highest Detected Level: 0.84+0.51
Range: 0.84+0.51 (Wise WCP)*
Date Tested: 7/7/16
Major Sources: Erosion of natural deposits.
Violation?: No

Special Monitoring (Not Regulated)

2023 report · PDF page 7

Sodium

Unit: PPM
MCL: Not Established
Highest Detected Level: 110
Range: 84 to 110
Date Tested: 7/11/23
Major Sources: Natural constituent of groundwater.
Violation?: N/A

Contaminant Subject to AL

2023 report · PDF page 7

Copper

Unit: PPM
AL: *1.3 at 90th Percentile
MCLG: 1.3
9 out of 10 Home Were Below a Level of:: 0.0
# of Samples Above the Action Level:: 0
Range of Individual Sample Results:: 0.0 to 0.0
Major Sources: Corrosion of household plumbing systems; erosion of natural deposits
Violation?: No

Lead

Unit: PPB
AL: ** 15 at 90th Percentile
MCLG: 0
9 out of 10 Home Were Below a Level of:: 0
# of Samples Above the Action Level:: 0
Range of Individual Sample Results:: 0 to 3
Major Sources: Lead service lines, corrosion of household plumbing including fittings & fixtures; erosion of natural deposits.
Violation?: No

Unregulated Contaminants

2023 report · PDF page 7

Manganese

Unit: PPB
Average Detected Level: 0.54
Range: 0.44 – 0.67
Date Tested: March & Aug 2020
Major Source: Natural constituent of groundwater

HAA5

Unit: PPB
Average Detected Level: 2.25
Range: 1.74-3.13
Date Tested: March & Aug 2020
Major Source: Byproduct of disinfection

HAABr

Unit: PPB
Average Detected Level: 0.31
Range: 0-0.46
Date Tested: March & Aug 2020
Major Source: Byproduct of disinfection

HAA9

Unit: PPB
Average Detected Level: 2.56
Range: 2.20-3.46
Date Tested: March & Aug 2020
Major Source: Byproduct of disinfection

Parameter

2023 report · PDF page 8

Calcium (as CaCO3)

Units: PPM
Typical Concentration: 60
Range: 40-70

Magnesium (as CaCO3)

Units: PPM
Typical Concentration: 42
Range: 33-58

Hardness* (as CaCO3)

Units: PPM
Typical Concentration: 98
Range: 86-130

Carbonate (as CaCO3)

Units: PPM
Typical Concentration: 22
Range: 17-27

Bicarbonate (as CaCO3)

Units: PPM
Typical Concentration: 16
Range: 13-23

Total Alkalinity (as CaCO3)

Units: PPM
Typical Concentration: 35
Range: 31-51

Iron at WCP*

Units: PPM
Typical Concentration: 0
Range: 0

Iron on Distribution*

Units: PPM
Typical Concentration: 0.1
Range: 0.1-0.28

Sulfate*

Units: PPM
Typical Concentration: 104
Range: 80-170

Chloride*

Units: PPM
Typical Concentration: 70
Range: 50-100

Phosphate, Ortho (as P)

Units: PPM
Typical Concentration: 0.3
Range: 0.1-0.6

pH

Units: pH units
Typical Concentration: 9.4
Range: 9.0-10

TDS

Units: PPM
Typical Concentration: 332
Range: 278-410

Conductivity*

Units: uS/cm
Typical Concentration: 580
Range: 450-730

2024 report records

Open the official 2024 report

Reading this report’s tables

BWL conducts frequent tests of our water and the following tables list those parameters and associated results of this testing. Drinking water may reasonably be expected to contain at least small amounts of some parameters and this does not necessarily indicate a health risk. These tables contain the name, the highest level allowed if regulated, the ideal goals for public health if established, the amount detected and the usual sources of such parameters. The tables don’t list the hundreds of parameters for which the BWL tested but didn’t detect a presence. Unless otherwise noted, the data presented in this table is from testing done from January 1 – December 31, 2024. The BWL may reduce the monitoring frequency of certain parameters less often than once per year because the concentrations are not expected to vary significantly from year to year. While all the data are representative of the BWL’s water quality, some results are more than one year old.

AL: Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
L1: Level 1 Assessment: A study of the water supply to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.
L2: Level 2 Assessment: A very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.
MCL: Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
MCLG: Maximum Contaminant Level Goal: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
MRDL: Maximum Residual Disinfectant Level: The highest level of a disinfectant allowed in drinking water. There is convincing evidence that the addition of a disinfectant is necessary for control of microbial contaminants.
MRDLG: Maximum Residual Disinfectant Level Goal: The level of a disinfectant in drinking water below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminats.
N/A: Not Applicable
ND: Not detectable at testing limit
pCi/L: Picocuries per liter (a measure of radioactivity)
PPB: Parts Per Billion, or micrograms per liter (ug/l) (equivalent to one penny in $10,000,000).
PPM: Parts Per Million, or milligrams per liter (mg/l) (equivalent to one penny in $10,000). PPT PPT Parts per Trillion, or nanogram per liter (ng/L) (equivalent to one penny in ten billion dollars).

Definitions reproduced from PDF page 5; they describe this report’s terminology and historical regulatory context.

Material table notes

Lead and copper table action-level notes: The source notes specify that 9 out of 10 tested homes must show a concentration equal to or lower than 1.3 parts per million for copper and 15 parts per billion for lead. These explain the action-level framework printed in this historical report, not a household safety threshold.
Radium source note: The report identifies the listed result with Wise WCP. Dye WCP was sampled in July 2022 and no radium was detected. This separate plant/date note must not be applied as a nondetect finding to the printed Wise result.
Typical-analysis seasonal note: The starred parameters typically reach the high end of their ranges during high-demand periods in June, July and August. Preserve the asterisks on the individual rows; this note does not turn every typical-analysis range into a regulatory limit.
Typical-analysis location labels: WCP means water conditioning plant. Iron at WCP and iron on distribution are separate rows with distinct sampling-location labels, not duplicate observations to combine.

Microbial Contaminants

2024 report · PDF page 6

Total Coliform Bacteria

Number Detected: 0
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Naturally present in the environment
Violation?: No

E. coli

Number Detected: 0
L1 Assessment Triggered?: No
L2 Assessment Triggered?: No
Major Sources: Human or animal fecal waste
Violation?: No

Regulated Contaminant

2024 report · PDF page 6

Haloacetic Acids (HAA5)

Unit: PPB
MCL: 60
MCLG: N/A
Highest Average Detected Level: 3.5
Range of Detected Levels: 1.7 to 4.0
Major Sources: Byproduct of drinking water disinfection
Violation?: No

Total Trihalomethanes (TTHMs)

Unit: PPB
MCL: 80
MCLG: N/A
Highest Average Detected Level: 4.5
Range of Detected Levels: 2.3 to 5.6
Major Sources: Byproduct of drinking water disinfection
Violation?: No

Chloramines

Unit: PPM
MCL: MRDL 4
MCLG: MRDLG 4
Highest Average Detected Level: 2.2
Range of Detected Levels: 0.40 to 2.8
Major Sources: Water additive to control microbes
Violation?: No

Regulated Contaminant

2024 report · PDF page 6

Fluoride

Unit: PPM
MCL: 4
MCLG: 4
Highest Detected Level: 0.72
Range: <0.64 to 0.72
Date Tested: 7/01/24
Major Sources: Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories
Violation?: No

Barium

Unit: PPM
MCL: 2
MCLG: 2
Highest Detected Level: 0.030
Range: 0.025- 0.030
Date Tested: 7/27/21
Major Sources: Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits
Violation?: No

Radioactive Contaminant

2024 report · PDF page 6

Gross Alpha

Unit: pCi/L
MCL: 15
MCLG: 0
Highest Detected Level: 2.37
Range: 0.230-2.37
Date Tested: 7/11/23
Major Sources: Erosion of natural deposits
Violation?: No

Radium 226 and 228

Unit: pCi/L
MCL: 5
MCLG: 0
Highest Detected Level: 0.84+0.51
Range: 0.84+0.51 (Wise WCP)*
Date Tested: 7/7/16
Major Sources: Erosion of natural deposits
Violation?: No

Special Monitoring (Not Regulated)

2024 report · PDF page 7

Sodium

Unit: PPM
MCL: Not Established
Highest Detected Level: 110
Range: 84 to 110
Date Tested: 7/11/23
Major Sources: Natural constituent of groundwater
Violation?: N/A

Contaminant Subject to AL

2024 report · PDF page 7

Copper

Unit: PPM
AL: *1.3 at 90th Percentile
MCLG: 1.3
9 out of 10 Homes Were Below a Level of:: 0.0
# of Samples Above the Action Level:: 0
Range of Individual Sample Results:: 0.0 to 0.0
Major Sources: Corrosion of household plumbing systems; erosion of natural deposits
Violation?: No

Lead

Unit: PPB
AL: ** 15 at 90th Percentile
MCLG: 0
9 out of 10 Homes Were Below a Level of:: 0
# of Samples Above the Action Level:: 0
Range of Individual Sample Results:: 0 to 3
Major Sources: Lead service lines, corrosion of household plumbing including fittings & fixtures; erosion of natural deposits
Violation?: No

Unregulated Contaminants

2024 report · PDF page 7

Manganese

Unit: PPB
Average Detected Level: 0.54
Range: 0.44 – 0.67
Date Tested: March & Aug 2020
Major Source: Natural constituent of groundwater

HAA5

Unit: PPB
Average Detected Level: 2.25
Range: 1.74-3.13
Date Tested: March & Aug 2020
Major Source: Byproduct of disinfection

HAABr

Unit: PPB
Average Detected Level: 0.31
Range: 0-0.46
Date Tested: March & Aug 2020
Major Source: Byproduct of disinfection

HAA9

Unit: PPB
Average Detected Level: 2.56
Range: 2.20-3.46
Date Tested: March & Aug 2020
Major Source: Byproduct of disinfection

Lithium

Unit: PPB
Average Detected Level: 12.56
Range: 6.16-19.6
Date Tested: Feb & Aug 2024
Major Source: Natural constituent of groundwater

Parameter

2024 report · PDF page 8

Calcium (as CaCO3)

Units: PPM
Typical Concentration: 59
Range: 48-72

Magnesium (as CaCO3)

Units: PPM
Typical Concentration: 42
Range: 33-53

Hardness* (as CaCO3)

Units: PPM
Typical Concentration: 100
Range: 89-120

Carbonate (as CaCO3)

Units: PPM
Typical Concentration: 19
Range: 10-31

Bicarbonate (as CaCO3)

Units: PPM
Typical Concentration: 16
Range: 6-34

Total Alkalinity (as CaCO3)

Units: PPM
Typical Concentration: 33
Range: 27-49

Iron at WCP*

Units: PPM
Typical Concentration: 0
Range: 0

Iron on Distribution*

Units: PPM
Typical Concentration: 0.1
Range: 0.1-0.28

Sulfate*

Units: PPM
Typical Concentration: 104
Range: 86-135

Chloride*

Units: PPM
Typical Concentration: 83
Range: 68-118

Phosphate, Ortho (as P)

Units: PPM
Typical Concentration: 0.34
Range: 0.20-0.50

pH

Units: pH units
Typical Concentration: 9.5
Range: 9.1-9.8

TDS

Units: PPM
Typical Concentration: 332
Range: 278-410

Conductivity*

Units: uS/cm
Typical Concentration: 595
Range: 510-770

Water supply

Groundwater beneath mid-Michigan

BWL’s 2025 report describes 112 groundwater wells, approximately 400 feet deep, drawing from the Saginaw Aquifer. Transmission mains carry the water to two conditioning plants. This is the utility’s reported supply, not an address-level confirmation: check the provider on your water bill before using these results for your home.

The report describes protective clay and shale layers, but also areas where water can enter the aquifer without that protection. It attributes a high susceptibility finding to the state’s 2003 source-water assessment. Susceptibility describes the potential for contamination; it is not a measured contaminant result or a finding about today’s tap water.

BWL supports regional wellhead protection and describes a USGS groundwater model supported through a state-administered grant. Residents can help protect recharge areas by using appropriate disposal services for fuel, paint, pesticides and medicines instead of pouring them on the ground or down drains.

To request the local source-water assessment, the report directs readers to BWL’s Water Quality Administrator at 517-702-7059.

2025 BWL report, page 4. The report was issued April 1, 2026; the assessment dates to 2003.

Treatment

Softening, disinfection and corrosion control

The 2025 report says the plants remove about 80% of the incoming hardness. Water is then disinfected, fluoridated, treated for corrosion control, filtered and stored in reservoirs before distribution. Treatment-process descriptions explain the system; they do not predict conditions at an individual faucet.

Hardness after conditioning: The typical-analysis table prints a typical concentration of 98 PPM as CaCO3 and a range of 89–120 PPM. These are typical conditioned-water observations, not a household test or a safety rating.
Disinfectant residual: The 2025 chloramines row prints 2.0 PPM, range 0.50–2.8 PPM, with an MRDL and MRDLG of 4 PPM. A disinfectant residual and its byproducts are different measurements.
Fluoride: The report lists 0.72 PPM, range 0.64–0.72 PPM, dated 07/01/24. Its older water sampling date remains visible even though it appears in the 2025 report.
Corrosion-control context: The process description states that corrosion control is used. The typical-analysis table separately lists orthophosphate (as P), typical concentration 0.35 PPM, range 0.20–0.50 PPM, and pH 9.4, range 9.1–9.8. Those observations do not establish the regulator’s approved operating targets.

BWL’s undated water FAQ gives a different approximate softening figure: 85%, compared with about 80% in the 2025 annual report. The FAQ reports remaining hardness of about 98 mg/L or 5.7 grains per gallon and says hardness can rise during summer demand. These descriptions are attributed separately; the difference is not silently reconciled. Read BWL’s water FAQ.

The report notes that starred typical-analysis parameters tend toward the high end of their ranges during June, July and August high-demand periods. This is seasonal context, not a current change in source or treatment.

2025 report, pages 4 and 6–8. Printed dates, units and historical criteria are retained.

Monitoring

Understand the dates and limits of the results

The 2025 annual report combines several monitoring periods. Lead and copper results are from 2023; four unregulated-contaminant rows describe March and August 2020; lithium describes February and August 2024. Comparing these as if they were simultaneous water samples would be misleading.

The microbial table records two total-coliform detections and zero E. coli detections for January 1–December 31, 2025. Both rows print “No” for L1 Assessment Triggered?, L2 Assessment Triggered? and Violation?. These are the report’s dated row fields, not a current notice determination.

The lead table prints a 90th-percentile result of 0 PPB, range 0–3 PPB, and zero water samples above its printed action level. Copper is 0.0 PPM, range 0.0–0.0 PPM, also with zero water samples above the printed action level. These system water sampling statistics do not establish the lead content of a particular home’s plumbing or water.

The report’s PFAS passage is a grouped no-detection narrative, not a table of individual analyte results. Its 1,4-dioxane passage describes a trace-level finding in 2015. Neither passage is expanded into invented water sample rows or a statement about current conditions.

Two printed details need particular care: the HAA5 result of 3.0 PPB is paired with a range ending at 2.7 PPB; the radium entry reads 1.35+0.93 Wise WCP*. These remain as printed rather than being silently corrected or combined.

2025 definitions and material table notes

AL Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
Contaminant: Any physical, chemical, biological, or radiological substance or matter in water.
L1 Level 1 Assessment: A study of the water supply to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.
L2 Level 2 Assessment: A very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.
MCL Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
MCLG Maximum Contaminant Level Goal: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
MRDL Maximum Residual Disinfectant Level: The highest level of a disinfectant allowed in drinking water. There is convincing evidence that the addition of a disinfectant is necessary for control of microbial contaminants.
MRDLG Maximum Residual Disinfectant Level Goal: The level of a disinfectant in drinking water below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminats.
N/A: Not Applicable
ND: Not detectable at testing limit
pCi/L: Picocuries per liter (a measure of radioactivity)
PPB: Parts Per Billion, or micrograms per liter (ug/l) (equivalent to one penny in $10,000,000).
PPM: Parts Per Million, or milligrams per liter (mg/l) (equivalent to one penny in $10,000).
PPT: PPT Parts per Trillion, or nanogram per liter (ng/L) (equivalent to one penny in ten billion dollars).

Table notes

Unless otherwise noted, the data presented in this table is from testing done from January 1 – December 31, 2025. Monitoring frequency may be reduced, and some results are more than one year old.

*Includes data from the prior year.

*9 out of 10 homes tested must show a concentration equal to or lower than 1.3 parts per million.

**9 out of 10 homes tested must show a concentration equal to or lower than 15 parts per billion.

*Dye Water Conditioning Plant (WCP) was analyzed 07/2022 and no radium 226 & 228 were detected.

*These parameters will typically be at the high end of the range during high demand periods in the summer months of June, July and August.

2025 report, pages 5–8. Issued April 1, 2026; checked September 17, 2026.

Inspections and history

Surveys, lead monitoring and facility records

EPA’s 2026Q2 SDWIS download contains 39 site-visit records for Lansing, including complete sanitary surveys dated February 13, 2011; March 6, 2015; June 20, 2019; and October 3, 2023. Other entries include scheduled visits, water sample collection, operation and maintenance, and a partial survey. A visit record is not itself a violation determination.

The October 3, 2023 survey codes identify minor deficiencies for source water, pumps, treatment, finished-water storage and distribution; recommendations for security and data verification; and no deficiencies or recommendations in the remaining listed categories. The source comment describes a Dye WCP inspection. These codes do not describe the individual deficiencies or establish whether each was later corrected. The full survey and response records are needed for that conclusion.

The same download contains 26 lead 90th-percentile records covering water sampling periods from 1992 through 2023. These are system monitoring statistics, not individual household results. Federal water sampling windows can cover multiple years, while an annual report may describe the actual collection season. The extract’s PB90 records are not a complete copper-monitoring dataset.

The facility file contains 165 named records, including source wells, treatment and other facilities with their reported status. A facility-record count is not the count of currently producing wells. It should not replace the differently dated well and network counts in BWL’s annual report and rate books.

Within that file, 112 wells are coded active and 36 inactive. It also lists eight active pump facilities, two active treatment plants, five active storage facilities, one inactive storage facility and one active distribution-system record. The 112 active-well records agree with the 2025 annual report’s well count; they do not by themselves establish daily production or the status of every well today.

A separate milestone records submission of the lead service-line inventory on October 16, 2024. That confirms a reported submission date, not the inventory’s material-category totals or the result of each property inspection.

Two earlier visit comments add local operational detail. On November 12, 2021, the state record discusses 90-series wells leased by BWL from Lansing Township and their addition to BWL’s inventory while retaining township ownership. On August 3, 2021, a proposed test-well visit records a request to reduce the isolation area from 200 feet to 84 feet; the comment says the variance could not be provided until EGLE completed hydrogeological review and an aquifer test. That is a recorded request and review condition, not evidence that the variance was granted or remains in effect.

Open a group, then a record. Source codes are paired with the official dictionary where available. Blank fields remain blank-in-source statements. “Z” in evaluation fields means not applicable; it does not mean the component passed inspection.

Site visits and sanitary surveys · 39 records

02/24/2026 · Regularly Scheduled · record 41

Management and operations evaluation: Z · Not Applicable
Source water evaluation: Z · Not Applicable
Security evaluation: Z · Not Applicable
Pumps evaluation: Z · Not Applicable
Other evaluation: Z · Not Applicable
Compliance evaluation: Z · Not Applicable
Data verification evaluation: Z · Not Applicable
Treatment evaluation: Z · Not Applicable
Finished-water storage evaluation: Z · Not Applicable
Distribution evaluation: Z · Not Applicable
Financial evaluation: Z · Not Applicable
Visit comments: Blank in source
Visit ID: 41
Visit date: 02/24/2026
Agency type code: ST · State
Visit purpose: RSCH · Regularly Scheduled
Federal snapshot quarter: 2026Q2
Public water system ID: MI0003760
First reported date: 05/29/2026
Last reported date: 06/23/2026