Annual report summary

PETERSBURG: Annual Water Quality Report 2025 Summary

15 reviewed rows from the 2025 report for PWSID AK2130148, shown with the original report source and row-level context.

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Reviewed annual reportSource retrieved: July 22, 2026Data reviewed: July 22, 2026

Report identity and source

Public water system: PETERSBURG
PWSID: AK2130148
Report year: 2025
Official publisher/source: Petersburg Borough / Petersburg Water Utility Annual Water Quality Report 2025
Source retrieved: 2026-07-22
Last reviewed: 2026-07-22

Reviewed Report Rows

15 reviewed rows from the 2025 report

Measurements, ranges, units, limit fields, status cells, likely-source wording, and table names remain scoped to the named annual-report rows.

Inorganic and radioactive results

Nine reported rows, including action-level and below-reporting-limit results.

Inorganic and radioactive results: 2025 annual-report rows for PETERSBURG
Report row	Reported measurement	Range in report	Sites above action level	Testing period in report	Unit	Limit or standard field	Status printed for this row	Source page	Source table
Gross Alpha (2025)	Detected Level: 0	No separate range printed	Not listed for this report row	2025	pCi/L	MCL Goal: 0; MCL: 15	SYSTEM in VIOLATION: NO (row sample period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic
Radium 226 (2025)	Detected Level: 0	No separate range printed	Not listed for this report row	2025	pCi/L	MCL Goal: 0; MCL: 5	SYSTEM in VIOLATION: NO (row sample period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic
Radium 228 (2025)	Detected Level: 0	No separate range printed	Not listed for this report row	2025	pCi/L	MCL Goal: 0; MCL: 5	SYSTEM in VIOLATION: NO (row sample period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic
Barium (2019)	Detected Level: 8.8	No separate range printed	Not listed for this report row	2019	Ppb	MCL Goal: 2,000; MCL: 2,000	SYSTEM in VIOLATION: NO (row sample period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic
Copper (2024)	Detected Level: 24	No separate range printed	No sites above action level	2024	Ppb	MCL Goal: 1300; MCL / AL: 1300 (AL)	SYSTEM in VIOLATION: NO (row sample period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic
Fluoride	Detected Level average: 0.70 avg; 0.70 avg.	0.5-0.9	Not listed for this report row	January 1-December 31, 2025	Ppm	MCL Goal: 4; MCL: 4	SYSTEM in VIOLATION: NO (row report period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic
Selenium (2019)	Detected Level: <MRL	<MRL	Not listed for this report row	2019	Ppb	MCL Goal: 50; MCL: 50	SYSTEM in VIOLATION: NO (row sample period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic
Lead (2024)	Detected Level: 3.5	No separate range printed	No sites above action level	2024	Ppb	MCL Goal: 0; MCL / AL: 15 (AL)	SYSTEM in VIOLATION: NO (row sample period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic
Nitrate/Nitrite	Detected Level: 0.033	No separate range printed	Not listed for this report row	January 1-December 31, 2025	Ppm	MCL Goal: 10; MCL: 10	SYSTEM in VIOLATION: NO (row report period)	2	2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowGross Alpha (2025)

Reported measurementDetected Level: 0

Range in reportNo separate range printed

Sites above action levelNot listed for this report row

Testing period in report2025

UnitpCi/L

Limit or standard fieldMCL Goal: 0; MCL: 15

Status printed for this rowSYSTEM in VIOLATION: NO (row sample period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowRadium 226 (2025)

Reported measurementDetected Level: 0

Range in reportNo separate range printed

Sites above action levelNot listed for this report row

Testing period in report2025

UnitpCi/L

Limit or standard fieldMCL Goal: 0; MCL: 5

Status printed for this rowSYSTEM in VIOLATION: NO (row sample period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowRadium 228 (2025)

Reported measurementDetected Level: 0

Range in reportNo separate range printed

Sites above action levelNot listed for this report row

Testing period in report2025

UnitpCi/L

Limit or standard fieldMCL Goal: 0; MCL: 5

Status printed for this rowSYSTEM in VIOLATION: NO (row sample period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowBarium (2019)

Reported measurementDetected Level: 8.8

Range in reportNo separate range printed

Sites above action levelNot listed for this report row

Testing period in report2019

UnitPpb

Limit or standard fieldMCL Goal: 2,000; MCL: 2,000

Status printed for this rowSYSTEM in VIOLATION: NO (row sample period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowCopper (2024)

Reported measurementDetected Level: 24

Range in reportNo separate range printed

Sites above action levelNo sites above action level

Testing period in report2024

UnitPpb

Limit or standard fieldMCL Goal: 1300; MCL / AL: 1300 (AL)

Status printed for this rowSYSTEM in VIOLATION: NO (row sample period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowFluoride

Reported measurementDetected Level average: 0.70 avg; 0.70 avg.

Range in report0.5-0.9

Sites above action levelNot listed for this report row

Testing period in reportJanuary 1-December 31, 2025

UnitPpm

Limit or standard fieldMCL Goal: 4; MCL: 4

Status printed for this rowSYSTEM in VIOLATION: NO (row report period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowSelenium (2019)

Reported measurementDetected Level: <MRL

Range in report<MRL

Sites above action levelNot listed for this report row

Testing period in report2019

UnitPpb

Limit or standard fieldMCL Goal: 50; MCL: 50

Status printed for this rowSYSTEM in VIOLATION: NO (row sample period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowLead (2024)

Reported measurementDetected Level: 3.5

Range in reportNo separate range printed

Sites above action levelNo sites above action level

Testing period in report2024

UnitPpb

Limit or standard fieldMCL Goal: 0; MCL / AL: 15 (AL)

Status printed for this rowSYSTEM in VIOLATION: NO (row sample period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Report rowNitrate/Nitrite

Reported measurementDetected Level: 0.033

Range in reportNo separate range printed

Sites above action levelNot listed for this report row

Testing period in reportJanuary 1-December 31, 2025

UnitPpm

Limit or standard fieldMCL Goal: 10; MCL: 10

Status printed for this rowSYSTEM in VIOLATION: NO (row report period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Inorganic

Disinfection byproducts and treatment techniques

Five reported rows, including non-regulatory and treatment-technique results.

Disinfection byproducts and treatment techniques: 2025 annual-report rows for PETERSBURG
Report row	Reported measurement	Range in report	Testing period in report	Unit	Limit or standard field	Status printed for this row	Source page	Source table
Chloroform	Detected Level maximum: 51.0 max	51.0 max	January 1-December 31, 2025	Ppb	MCL Goal: N/A; MCL: Not Regulated	SYSTEM in VIOLATION: NO (row report period)	2	2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products
Total Trihalomethanes (TTHM)	Detected Level average: 33.88 avg	16.35-51.69	January 1-December 31, 2025	Ppb	MCL Goal: N/A; MCL: 80	SYSTEM in VIOLATION: NO (row report period)	2	2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products
Total Haloacetic Acids	Detected Level average: 24.59 avg	14.80-44.00	January 1-December 31, 2025	Ppb	MCL Goal: N/A; MCL: 60	SYSTEM in VIOLATION: NO (row report period)	2	2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products
Total Organic Carbon	Detected Level average: 76.4% avg	60.2--92.3% removal	January 1-December 31, 2025	TT	MCL Goal: 35% to 45% removal (TT); MCL: 35% to 45% removal (TT)	SYSTEM in VIOLATION: NO (row report period)	2	2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products
Turbidity	Detected Level: 0.27 NTU (Highest); 100% of samples <MCL	No separate range printed	January 1-December 31, 2025	NTU	MCL Goal: N/A; MCL: 95% of samples under 0.3(TT)	SYSTEM in VIOLATION: NO (row report period)	2	2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Report rowChloroform

Reported measurementDetected Level maximum: 51.0 max

Range in report51.0 max

Testing period in reportJanuary 1-December 31, 2025

UnitPpb

Limit or standard fieldMCL Goal: N/A; MCL: Not Regulated

Status printed for this rowSYSTEM in VIOLATION: NO (row report period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Report rowTotal Trihalomethanes (TTHM)

Reported measurementDetected Level average: 33.88 avg

Range in report16.35-51.69

Testing period in reportJanuary 1-December 31, 2025

UnitPpb

Limit or standard fieldMCL Goal: N/A; MCL: 80

Status printed for this rowSYSTEM in VIOLATION: NO (row report period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Report rowTotal Haloacetic Acids

Reported measurementDetected Level average: 24.59 avg

Range in report14.80-44.00

Testing period in reportJanuary 1-December 31, 2025

UnitPpb

Limit or standard fieldMCL Goal: N/A; MCL: 60

Status printed for this rowSYSTEM in VIOLATION: NO (row report period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Report rowTotal Organic Carbon

Reported measurementDetected Level average: 76.4% avg

Range in report60.2--92.3% removal

Testing period in reportJanuary 1-December 31, 2025

UnitTT

Limit or standard fieldMCL Goal: 35% to 45% removal (TT); MCL: 35% to 45% removal (TT)

Status printed for this rowSYSTEM in VIOLATION: NO (row report period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Report rowTurbidity

Reported measurementDetected Level: 0.27 NTU (Highest); 100% of samples <MCL

Range in reportNo separate range printed

Testing period in reportJanuary 1-December 31, 2025

UnitNTU

Limit or standard fieldMCL Goal: N/A; MCL: 95% of samples under 0.3(TT)

Status printed for this rowSYSTEM in VIOLATION: NO (row report period)

Source page2

Source table2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Disinfectants

One reported chlorine residual row.

Disinfectants: 2025 annual-report rows for PETERSBURG
Report row	Reported measurement	Range in report	Testing period in report	Unit	Limit or standard field	Status printed for this row	Source page	Source table
Chlorine	PWU average: 0.61 avg	.30-.80	January 1-December 31, 2025	Ppm	MRDLG: 4.0; MRDL: 4.0	SYSTEM in VIOLATION: NO (row report period)	2	Disinfectants

Report rowChlorine

Reported measurementPWU average: 0.61 avg

Range in report.30-.80

Testing period in reportJanuary 1-December 31, 2025

UnitPpm

Limit or standard fieldMRDLG: 4.0; MRDL: 4.0

Status printed for this rowSYSTEM in VIOLATION: NO (row report period)

Source page2

Source tableDisinfectants

Report footnotes

Report-period status: The source-printed NO cells apply only to each row's named sample or report period. They do not establish current compliance, the absence of a current notice, or conditions at a household tap.
Action-level scope: The Copper and Lead rows preserve `No sites above action level` for 2024. The annual rows do not determine plumbing or tap conditions at a specific property.
Method reporting limit: The report defines MRL as Method Reporting Limit. Less than MRL is not zero and is not converted into a numeric detection.
Non-regulatory row: The Chloroform row prints Not Regulated and also prints NO in the violation column. Neither source cell is converted into an independent regulatory finding.
Treatment-technique rows: TOC and Turbidity preserve the source's printed treatment-technique criteria. This page does not independently calculate current compliance.

Reported row

Gross Alpha (2025)

Likely source listed in report: Radioactivity caused by Alpha particle emission
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The source table's `SYSTEM in VIOLATION` cell is preserved without inferring current compliance or safety status.

Reported row

Radium 226 (2025)

Likely source listed in report: Natural occurring radioactive element
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The source table's `SYSTEM in VIOLATION` cell is preserved without inferring current compliance or safety status.

Reported row

Radium 228 (2025)

Likely source listed in report: Natural occurring radioactive element
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The source table's `SYSTEM in VIOLATION` cell is preserved without inferring current compliance or safety status.

Reported row

Barium (2019)

Likely source listed in report: Erosion from natural deposits
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The source table prints this row with source year 2019; no current-year sampling inference was added.

Reported row

Copper (2024)

Likely source listed in report: Corrosion of household plumbing systems.
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The source prints `No sites above action level`; that text is preserved without converting it to a numeric zero or a property-level conclusion.

Reported row

Fluoride

Likely source listed in report: Fluoride is added to the water to promote dental health. Erosion from natural deposits.
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The detected-level cell includes both a range and an average; both are preserved without collapsing the row to one unsupported value.

Reported row

Selenium (2019)

Likely source listed in report: Erosion from natural deposits
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The report defines MRL as Method Reporting Limit. Less than MRL is not converted to zero or a numeric detection.

Reported row

Lead (2024)

Likely source listed in report: Corrosion of household plumbing systems.
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The source prints `No sites above action level`; the annual row cannot determine conditions at a specific property or tap.

Reported row

Nitrate/Nitrite

Likely source listed in report: Surface run off containing vegetation or agricultural pollutants
Source table: 2025 Annual Treated Drinking Water Quality Report - Inorganic

Preservation and source notes

The combined `Nitrate/Nitrite` source label is preserved without assigning a single-contaminant taxonomy id.

Reported row

Chloroform

Likely source listed in report: Disinfection by-product
Source table: 2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Preservation and source notes

The source prints `Not Regulated` and a `SYSTEM in VIOLATION: NO` cell. Neither is converted into a regulatory finding.

Reported row

Total Trihalomethanes (TTHM)

Likely source listed in report: Disinfection by-products
Source table: 2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Preservation and source notes

The detected-level cell includes both a range and an average; both are preserved without inferring current safety or compliance status.

Reported row

Total Haloacetic Acids

Likely source listed in report: Disinfection by-products
Source table: 2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Preservation and source notes

The source label wraps across two lines; the detected-level range and average are preserved from the same rendered row.

Reported row

Total Organic Carbon

Likely source listed in report: Naturally present in the environment. TOC provides a medium for the formation of disinfection by products.
Source table: 2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Preservation and source notes

The source prints a double hyphen in `60.2--92.3% removal`; it is retained as printed.

Reported row

Turbidity

Likely source listed in report: Soil run off. Turbidity has no health effects but can interfere with disinfection and provide a medium for microbial growth.
Source table: 2025 Annual Treated Drinking Water Quality Report - Disinfection By-Products

Preservation and source notes

The likely-source field preserves report wording and is not adopted as a current site health conclusion.

Reported row

Chlorine

Likely source listed in report: Water additive to control Microbes
Source table: Disinfectants

Preservation and source notes

The disinfectants section uses MRDL/MRDLG columns instead of MCL/MCL Goal columns.

Report Context

Context attributed to the source report

These summaries are limited to the named annual report and do not assert live system, compliance, or advisory status.

Annual-report scope

The Petersburg Water Utility document is a 2025 annual report for PWSID AK2130148. Annual-report statements do not establish live status.

Source-water context

The report identifies Cabin Creek as the primary source and City Creek as a backup source.

Historical source-water assessment

The report references a 2003 source-water assessment. That historical assessment is not a current water-quality finding.

Monitoring scope

The report states a January 1 through December 31, 2025 reporting period while several rows retain older printed sample years.

SOC waiver context

The report describes a Synthetic Organic Chemical monitoring waiver only for the printed 2023 through 2025 cycle.

Lead inventory context

The report says its 2024 inventory identified all lines as Non-Lead. A system-level inventory statement is not property-level proof.

Report-period statistics

Page 2 prints population 3,045 and 1,184 customer connections. These are report-period figures and are not presented as reconciled current profile values.

All reported result rows

This page includes all fifteen rows printed in the report's three result-table sections, including action-level, below-reporting-limit, non-regulatory, and treatment-technique results.

Definitions printed in the report

All eighteen report definitions are transcribed as reading context. They do not create a current compliance or safety conclusion.

Definitions printed in this report

AL: Action Level - The concentration of a contaminant which if exceeded, triggers treatment or other requirements which a water system must follow.
AVG: Average
PWU: Petersburg Water Utility
CDC: Center of Disease Control and Prevention
DEC: Alaska Department of Environmental Conservation
EPA: U.S. Environmental Protection Agency
MCL: Maximum Contaminant Level - The highest level of a contaminant that is allowed in drinking water. MCL's are set as close to the MCLG's 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. MCLG's allow for a margin of safety.
MRDL: Maximum Residual Disinfection Level
MRDLG: Maximum Residual Disinfection Level Goal
MRL: Method Reporting Limit
NTU: Nephelometric Turbidity Units
PPM: Parts per million or milligrams per liter
MGD: Million Gallons per Day
PPB: Parts per billion or micrograms per liter
Turbidity: Suspended material or cloudiness
TT: Treatment Technique - A required process intended to reduce the level of a contaminant in drinking water.
pCi/L: Radioactivity Concentration Unit

How to read a water quality report

A plain-English walkthrough of Consumer Confidence Reports, including report years, detected contaminants, legal limits, violations, and source notes.

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Report Disclosures

Source-period disclosures kept separate from live status

These items preserve report wording and scope. They do not create violation records, advisory records, or a current-status conclusion.

Source limitation

Annual-report assurance is not a live status finding

Page 1 says the utility's drinking water is safe and meets Federal and State requirements. That wording is retained only as a statement printed in the 2025 annual report; this site does not adopt it as a present-day compliance, safety, advisory, or household-tap conclusion.

Current status is not asserted. Check official current sources for notices or instructions.

Evidence

Official report and system source paths

Use official federal, state, utility, or report sources before treating a page as final.

EPA data
EPA Envirofacts public water system record for AK2130148 (opens official source)
State data
Alaska DEC monitoring summary for AK2130148 (opens official source)
State data
Alaska DEC Drinking Water Watch system record for AK2130148 (opens official source)
Utility website
Petersburg Borough Water Utility page (opens official source)
Utility website
Petersburg Borough news archive (opens official source)
Utility report
Petersburg Borough / Petersburg Water Utility Annual Water Quality Report 2025 (opens official source)

Report identity and field provenance

Official annual report document: Petersburg Borough / Petersburg Water Utility Annual Water Quality Report 2025 Verified two-page PDF with SHA-256 dd280e99341b021e407f85f9986c8d707e187d5ff782ee87ab6b6850577ab8d2.
Report, publisher, PWSID, and year: Petersburg Borough / Petersburg Water Utility Annual Water Quality Report 2025 The cover binds Petersburg Water Utility, PWSID AK2130148, and the 2025 reporting year.
Current utility report path: Petersburg Borough Water Utility The utility page returned 200 and linked the exact annual report.
Current system identity: Alaska DEC Drinking Water Watch for AK2130148 The reviewed state page identifies active community system PETERSBURG using surface water.
Dated monitoring-summary context: Alaska DEC monitoring summary for AK2130148 The February 10, 2026 summary lists a corrective action due June 1, 2026; completion is unconfirmed and disclosed on the public report page.
Current public-notice archive path: Petersburg Borough Water and Wastewater news archive The filtered archive returned no items, but an archive cannot prove that no current notice exists.

PETERSBURG profile

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Petersburg city page

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Data and trust

How this report summary is handled

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Methodology

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Limitations

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Corrections

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