Report identity and source
- Public water system
- SITKA
- PWSID
- AK2130075
- Report year
- 2025
- Official publisher/source
- City and Borough of Sitka 2025 Drinking Water Quality Report
- Source retrieved
- 2026-07-22
- Last reviewed
- 2026-07-22
Reviewed Report Rows
16 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.
2025 treated-water results
Three rows as printed in the 2025 Test Results table.
| 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 |
|---|---|---|---|---|---|---|---|---|
| Total Coliform Bacteria | Level Detected: ND | No separate range printed | 2025 annual report; sample date not printed | Colonies per 100 ml | MCLG: 0; MCL: Note (1) | Violation: None (row report period) | 2 | 2025 Test Results |
| Turbidity | Level Detected: 2.74 (2) | No separate range printed | 2025 annual report; sample date not printed | NTU | MCLG: NA; MCL: 5.00 | Violation: None (row report period) | 2 | 2025 Test Results |
| Fluoride (Voluntary) - treated water | Level Detected: Avg. 0.57 (3) | No separate range printed | 2025 annual report; sample date not printed | ppm | MCLG: 2.0; MCL: 4.0 | Violation: None (row report period) | 2 | 2025 Test Results |
Blue Lake raw-water results
Four rows explicitly labeled as Blue Lake raw water in the report.
| 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 |
|---|---|---|---|---|---|---|---|---|
| Nitrate (as Nitrogen) | Level Detected: ND | No separate range printed | 2025 annual report; sample date not printed | ppm | MCLG: <10; MCL: 10 | Violation: None (row report period) | 2 | 2025 Test Results |
| Fluoride (Voluntary) - Blue Lake raw water | Level Detected: 0.342 | No separate range printed | 2025 annual report; sample date not printed | ppm | MCLG: 2.0; MCL: 4.0 | Violation: None (row report period) | 2 | 2025 Test Results |
| Barium | Level Detected: .00971 | No separate range printed | 2025 annual report; sample date not printed | ppm | MCLG: 2; MCL: 2 | Violation: None (row report period) | 2 | 2025 Test Results |
| Asbestos | Level Detected: 0.164 | No separate range printed | Undated value printed in the 2025 annual report; sample date not printed | MFL | MCLG: 7; MCL: 7 | Violation: None (row report period) | 2 | 2025 Test Results |
Lead and copper monitoring
Two April 2025 action-level rows; the table does not print a sites-above-action-level count.
| Report row | Reported measurement | Sites above action level | Testing period in report | Unit | Limit or standard field | Source page | Source table |
|---|---|---|---|---|---|---|---|
| Lead 2025 | 90th % value: 0.014 | Not printed in the source table | April 2025 | ppm | MCLG: 0.0; AL: 0.015 | 3 | "At the Tap" Lead & Copper Monitoring April 2025 Table 1 |
| Copper 2025 | 90th % value: 0.330 | Not printed in the source table | April 2025 | ppm | MCLG: 1.3; AL: 1.30 | 3 | "At the Tap" Lead & Copper Monitoring April 2025 Table 1 |
Disinfection byproducts and organic carbon
Three rows with annual or quarterly frequency as printed in the report.
| 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 |
|---|---|---|---|---|---|---|---|---|
| Total Trihalomethanes (TTHM) | Level Detected: 33.85 | Range Detected: NA | 2025 annual report; sampled annually | ppb | MCLG: NA; MCL: 80 | Violation: None (row report period) | 3 | Disinfection Byproducts (TTHM & HAA5 sampled Annually & TOC quarterly) |
| Total Haloacetic Acids (HAA5) | Level Detected: 30.50 | Range Detected: NA | 2025 annual report; sampled annually | ppb | MCLG: NA; MCL: 60 | Violation: None (row report period) | 3 | Disinfection Byproducts (TTHM & HAA5 sampled Annually & TOC quarterly) |
| Total Organic Carbon (TOC) | Level Detected: 0.708 | Range Detected: 0.724-0.862 | 2025 annual report; sampled quarterly | mg/L | MCLG: NA; MCL: NA | Violation: None (row report period) | 3 | Disinfection Byproducts (TTHM & HAA5 sampled Annually & TOC quarterly) |
Radioactive contaminants
Two radium rows retaining the report's unusual printed ppm unit.
| 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 |
|---|---|---|---|---|---|---|---|---|
| Radium - 226 | Level Detected: 0.55 | No separate range printed | 2025 annual report; sample date not printed | ppm | MCLG: 0; MCL: 5 | Violation: None (row report period) | 3 | Radioactive Contaminants |
| Radium - 228 | Level Detected: 0.63 | No separate range printed | 2025 annual report; sample date not printed | ppm | MCLG: 0; MCL: 5 | Violation: None (row report period) | 3 | Radioactive Contaminants |
PFAS UCMR5 monitoring
Two non-regulatory monitoring rows; MRL is not presented as an MCL.
| Report row | Reported measurement | Testing period in report | Unit | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|
| PFOS | Level Detected: <MRL | 2025 annual report; sampled quarterly | ppm | Violation: None (row report period) | 3 | 2025 BLWTP PFAS (Sampled Quarterly) |
| PFOA | Level Detected: <MRL | 2025 annual report; sampled quarterly | ppm | Violation: None (row report period) | 3 | 2025 BLWTP PFAS (Sampled Quarterly) |
Total Coliform Bacteria
- Likely source listed in report
- Naturally present in the environment
- Source table
- 2025 Test Results
Preservation and source notes
- The report defines ND as non-detects and states that none were found in the Total Coliform explanatory note.
Turbidity
- Likely source listed in report
- Natural soil runoff, glacial silt, land slides
- Source table
- 2025 Test Results
Preservation and source notes
- The note marker is preserved in the reported value because the source table prints `2.74 (2)`.
Fluoride (Voluntary) - treated water
- Likely source listed in report
- Water treatment additive, natural deposits
- Source table
- 2025 Test Results
Preservation and source notes
- The note marker and `Avg.` label are preserved because the source table prints `Avg. 0.57 (3)`.
Nitrate (as Nitrogen)
- Likely source listed in report
- Erosion of natural deposits, animal waste
- Source table
- 2025 Test Results
Preservation and source notes
- The source table labels this section as Blue Lake raw water; no finished-water inference was added.
Fluoride (Voluntary) - Blue Lake raw water
- Likely source listed in report
- Natural deposits
- Source table
- 2025 Test Results
Preservation and source notes
- The source table labels this section as Blue Lake raw water; no finished-water inference was added.
Barium
- Likely source listed in report
- Erosion of natural deposits
- Source table
- 2025 Test Results
Preservation and source notes
- The source table labels this section as Blue Lake raw water; no leading zero was added to the printed `.00971` value.
Asbestos
- Likely source listed in report
- Erosion of natural deposits
- Source table
- 2025 Test Results
Preservation and source notes
- The source table labels this section as Blue Lake raw water; no finished-water inference was added.
Lead 2025
- Likely source listed in report
- Corrosion of household plumbing systems
- Source table
- "At the Tap" Lead & Copper Monitoring April 2025 Table 1
Preservation and source notes
- The source table does not include a sites-exceeding-action-level column; the report text says April 2025 monitoring showed the 90th percentile value below the lead action level.
Copper 2025
- Likely source listed in report
- Corrosion of household plumbing systems
- Source table
- "At the Tap" Lead & Copper Monitoring April 2025 Table 1
Preservation and source notes
- The source table does not include a sites-exceeding-action-level column; no exceedance count was inferred.
Total Trihalomethanes (TTHM)
- Likely source listed in report
- By-Product of Chlorination
- Source table
- Disinfection Byproducts (TTHM & HAA5 sampled Annually & TOC quarterly)
Preservation and source notes
- The range field is preserved as display text because the source table prints `NA`.
Total Haloacetic Acids (HAA5)
- Likely source listed in report
- By-Product of Chlorination
- Source table
- Disinfection Byproducts (TTHM & HAA5 sampled Annually & TOC quarterly)
Preservation and source notes
- The range field is preserved as display text because the source table prints `NA`.
Total Organic Carbon (TOC)
- Likely source listed in report
- Naturally present in Environment
- Source table
- Disinfection Byproducts (TTHM & HAA5 sampled Annually & TOC quarterly)
Preservation and source notes
- The source prints 0.708 outside its printed 0.724-0.862 range; both values are preserved without correction.
Radium - 226
- Likely source listed in report
- Erosion of Natural Deposits
- Source table
- Radioactive Contaminants
Preservation and source notes
- The source table prints unit `ppm` for this radium row; no unit normalization was applied.
Radium - 228
- Likely source listed in report
- Erosion of Natural Deposits
- Source table
- Radioactive Contaminants
Preservation and source notes
- The source table prints unit `ppm` for this radium row; no unit normalization was applied.
PFOS
- Likely source listed in report
- Industrial discharges or spills
- Source table
- 2025 BLWTP PFAS (Sampled Quarterly)
Preservation and source notes
- The PFAS table lists UCMR5 MRL rather than MCL/MCLG; no MCL fields were inferred.
PFOA
- Likely source listed in report
- Industrial discharges or spills
- Source table
- 2025 BLWTP PFAS (Sampled Quarterly)
Preservation and source notes
- The PFAS table lists UCMR5 MRL rather than MCL/MCLG; no MCL fields were inferred.
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 City and Borough of Sitka document reports January through December 2025 monitoring for the named public water system.
Source-water context
The report describes Blue Lake as the primary source and Indian River and Sawmill Creek as additional source context.
Historical source assessment
The report references a 2003 source-water assessment and a 2004 protection plan. Those historical documents are not current water-quality findings.
Lead service-line inventory context
The report describes a utility inventory, but a system-level inventory statement does not determine plumbing or service-line material at a specific property.
Waiver and undated-sampling context
The report discusses reduced or waived monitoring and also prints an undated Asbestos value; the value is not assigned an invented 2025 sample date.
Complete result-table coverage
All sixteen rows printed in the report's result tables are represented, including action-level, raw-water, TOC, radioactive, and UCMR5 rows.
Treatment-process context
The report describes chlorine, ultraviolet treatment, fluoride addition, soda ash, and membrane-plant commissioning as report-period treatment context. This page does not adopt its broad safe, very clean, or high-quality assurances as current conclusions.
Annual report versus current information
The current City and Alaska DEC paths remain the appropriate places to check for newer reports or time-sensitive instructions. A reviewed archive cannot prove that no current notice exists.
Definitions printed in the report
All twelve printed abbreviations and unit definitions are transcribed as reading context. They do not create a current safety or compliance conclusion.
Historical and April 2025 lead context
The report says that before 2001, 35 of 40 sampled households exceeded at least one lead or copper action level, that soda ash addition began in January 2001, and that April 2025 monitoring printed a lead 90th percentile of 0.014 against a 0.015 action level. The undated attached public-education notice remains separately disclosed.
Turbidity and coliform report-period context
The report identifies October as the month of the highest raw-water turbidity and says none were found in its coliform narrative. Those statements remain limited to the report period.
Nitrate and fluoride narrative
The source-specific narrative prints a 0.7 to 1.2 ppm fluoride treatment target near a table result of Avg. 0.57. Both are preserved without reconciliation; generic health boilerplate is not repeated as a local finding.
TOC source wording
The report discusses TOC, disinfection byproducts, and broad health or MCL assurances while its TOC row prints MCL as NA. This page preserves the row and source discrepancy without adopting those assurances as a current conclusion.
Definitions printed in this report
- NR
- Not Regulated - reporting this data is not required
- NA
- Not Applicable, Not Available - does not apply or is not available
- ND
- Non-Detects - laboratory analysis indicates that the contaminant is not present
- MRL
- Method Reporting Limit - the minimum concentration that can be measured
- ppm
- parts per million or milligrams per liter (mg/L)
- ppb
- parts per billion or micrograms per liter (ug/L)
- Mfl
- million fibers per liter
- NTU
- Nephelometric Turbidity Unit
- AL
- Action Level: the concentration which, if exceeded, triggers treatment or other requirements
- MCL
- Maximum Contaminant Level: the highest contaminant level allowed in drinking water
- MCLG
- Maximum Contaminant Level Goal: a non-enforceable level allowing a margin of safety
- TT
- Treatment Technique: a required process intended to reduce a contaminant level
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.
View How to read a water quality reportReport 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.
Annual-report scope
This page summarizes the named 2025 annual report. It is not a live compliance, advisory, or household-tap status page.
Current status is not asserted. Check official current sources for notices or instructions.
Blue Lake rows are raw-water results
The report explicitly labels four rows as Blue Lake raw water; this page does not recast them as finished-water or household-tap measurements.
Current status is not asserted. Check official current sources for notices or instructions.
Asbestos sample date is not printed
The source's waiver wording and its undated Asbestos table value are both preserved. The value is not labeled as a 2025 sample.
Current status is not asserted. Check official current sources for notices or instructions.
Treated-fluoride statements differ
The table's Avg. 0.57 result and the narrative's 0.7 to 1.2 ppm target range are displayed as separate source statements without reconciliation.
Current status is not asserted. Check official current sources for notices or instructions.
Undated lead public-education attachment
Pages 4 and 5 are an undated public-education notice attached to the 2025 annual report. It says routine testing found elevated lead in some homes or buildings and some taps above the 0.015 mg/L action level, while also explaining that an action-level exceedance is not itself a violation. It is not presented as a current advisory, a current compliance finding, a systemwide condition, or a result at a specific tap.
Current status is not asserted. Check official current sources for notices or instructions.
TOC value and range conflict
The source prints 0.708 outside its printed 0.724 to 0.862 range. Both are retained without silent correction.
Current status is not asserted. Check official current sources for notices or instructions.
Radium units preserved as printed
The report prints ppm for Radium-226 and Radium-228. This page preserves that unit and does not normalize it.
Current status is not asserted. Check official current sources for notices or instructions.
PFAS rows are non-regulatory UCMR5 monitoring
The report's less-than-MRL values and UCMR5 reporting level are not presented as zero, an MCL, or a current safety finding.
Current status is not asserted. Check official current sources for notices or instructions.
Evidence
Official report and system source paths
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Report identity and field provenance
- Official annual report document: City and Borough of Sitka 2025 Drinking Water Quality Report Verified six-page PDF with SHA-256 a1b48b36e4bd6c93ae72a0f798c089c62146b2ee541aac380222830113b87d15.
- Report identity and monitoring period: City and Borough of Sitka 2025 Drinking Water Quality Report The cover names the 2025 annual scope and prints the PWSID with spaced typography.
- Report-to-PWSID relationship: Official report and Alaska DEC system identity The report identity is bound to full PWSID AK2130075 using the reviewed Alaska DEC record.
- Current system identity: Alaska DEC Drinking Water Watch for AK2130075 The reviewed state page identifies active community system SITKA. It is not treated as proof that no current notice exists.
SITKA profile
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How this report summary is handled
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Methodology
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