Annual report summary

KETCHIKAN PUBLIC UTILITIES: Ketchikan Public Utilities 2025 Annual Water Quality Report Summary

Six reviewed rows from the 2025 report for PWSID AK2120232, shown with the original report source and row-level context.

Open original report (new tab)Back to system profile →

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

Report identity and source

Public water system: KETCHIKAN PUBLIC UTILITIES
PWSID: AK2120232
Report year: 2025
Official publisher/source: Ketchikan Public Utilities 2025 Annual Water Quality Report
Source retrieved: 2026-07-22
Last reviewed: 2026-07-22

Reviewed Report Rows

Six 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.

Microbiological contaminants

One turbidity row as printed in the report's TEST RESULTS table.

Microbiological contaminants: 2025 annual-report rows for KETCHIKAN PUBLIC UTILITIES
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
Turbidity	Level Detected: 4.45	Not printed in the table	2025 (source table label)	NTU	MCLG: n/a; MCL: 5	MCL Violation: No (row sample period)	4	Test Results

Report rowTurbidity

Reported measurementLevel Detected: 4.45

Range in reportNot printed in the table

Testing period in report2025 (source table label)

UnitNTU

Limit or standard fieldMCLG: n/a; MCL: 5

Status printed for this rowMCL Violation: No (row sample period)

Source page4

Source tableTest Results

Chemical contaminants

One chloramines row as printed in the report's TEST RESULTS table.

Chemical contaminants: 2025 annual-report rows for KETCHIKAN PUBLIC UTILITIES
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
Chloramines	Level Detected: 2.00	Not printed in the table	2025	ppm	MRDLG: 4; MRDL: 4	MCL Violation: No (row sample period)	4	Test Results

Report rowChloramines

Reported measurementLevel Detected: 2.00

Range in reportNot printed in the table

Testing period in report2025

Unitppm

Limit or standard fieldMRDLG: 4; MRDL: 4

Status printed for this rowMCL Violation: No (row sample period)

Source page4

Source tableTest Results

Inorganic contaminants

Two 2024 lead and copper action-level rows from the 2025 annual report.

Inorganic contaminants: 2025 annual-report rows for KETCHIKAN PUBLIC UTILITIES
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
Copper - 90th percentile reporting	Level Detected: 0.460	Not printed in the table	None of the twenty samples exceeded the action level	2024	ppm	MCLG: 1.3; AL: 1.3	MCL Violation: No (row sample period)	5	Test Results
Lead - 90th percentile reporting	Level Detected: 3.8	Not printed in the table	None of the twenty samples exceeded the action level	2024	ppb	MCLG: zero; AL: 15	MCL Violation: No (row sample period)	5	Test Results

Report rowCopper - 90th percentile reporting

Reported measurementLevel Detected: 0.460

Range in reportNot printed in the table

Sites above action levelNone of the twenty samples exceeded the action level

Testing period in report2024

Unitppm

Limit or standard fieldMCLG: 1.3; AL: 1.3

Status printed for this rowMCL Violation: No (row sample period)

Source page5

Source tableTest Results

Report rowLead - 90th percentile reporting

Reported measurementLevel Detected: 3.8

Range in reportNot printed in the table

Sites above action levelNone of the twenty samples exceeded the action level

Testing period in report2024

Unitppb

Limit or standard fieldMCLG: zero; AL: 15

Status printed for this rowMCL Violation: No (row sample period)

Source page5

Source tableTest Results

Volatile organic contaminants

Two disinfection-byproduct rows with the report's table and narrative context preserved.

Volatile organic contaminants: 2025 annual-report rows for KETCHIKAN PUBLIC UTILITIES
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
TTHM (Total Trihalomethanes)	Level Detected: 32.65 & 32.92	Individual analytical results ranged between 22.79 and 44.10 ppb.	2025	ppb	MCLG: n/a; MCL: 80	MCL Violation: No (row sample period)	5	Test Results
HAA5 Haloacetic Acids	Level Detected: 39.68 & 41.48	Individual analytical results ranged between 29.00 and 51.50 ppb.	2025	ppb	MCLG: n/a; MCL: 60	MCL Violation: No (row sample period)	5	Test Results

Report rowTTHM (Total Trihalomethanes)

Reported measurementLevel Detected: 32.65 & 32.92

Range in reportIndividual analytical results ranged between 22.79 and 44.10 ppb.

Testing period in report2025

Unitppb

Limit or standard fieldMCLG: n/a; MCL: 80

Status printed for this rowMCL Violation: No (row sample period)

Source page5

Source tableTest Results

Report rowHAA5 Haloacetic Acids

Reported measurementLevel Detected: 39.68 & 41.48

Range in reportIndividual analytical results ranged between 29.00 and 51.50 ppb.

Testing period in report2025

Unitppb

Limit or standard fieldMCLG: n/a; MCL: 60

Status printed for this rowMCL Violation: No (row sample period)

Source page5

Source tableTest Results

Report footnotes

Report-period status: The source-printed No cells describe only the named table rows and their printed sample periods. They do not establish current compliance, the absence of a current notice, or conditions at a household tap.
Source Note (1): Turbidity measures water cloudiness; the report says it is tested as an indicator of microbiological quality.
Source Note (2): The report says 12 to 14 distribution disinfection samples were collected monthly, chloramine residual generally ran 1.2 to 1.6 ppm, and the minimum residual sample within a month ranged from 1.0 to 2.00 ppm.
Source Note (3): The report says none of twenty 2024 copper samples exceeded the 1.3 ppm action level and the next test cycle is due in 2027.
Source Note (4): The report says none of twenty 2024 lead samples exceeded the 15 ppb action level and the next test cycle is due in 2027.
Source Note (5): The report says eight 2025 samples were taken at two distribution sites and individual TTHM results ranged from 22.79 to 44.10 ppb.
Source Note (6): The report says eight 2025 samples were taken at two distribution sites and individual HAA5 results ranged from 29.00 to 51.50 ppb.
Source date discrepancy: The table labels 4.45 NTU as 2025, while the narrative dates the 4.45 NTU event to March 14, 2024. The source does not reconcile the difference.
Source value discrepancy: The table prints TTHM site values 32.65 and 32.92 ppb; the narrative prints 32.65 and 36.95 ppb. The source does not reconcile the second value.

Reported row

Turbidity

Likely source listed in report: Soil runoff
Source table: Test Results

Preservation and source notes

The table labels 4.45 NTU as Turbidity (2025), while the report narrative attributes the same 4.45 NTU event to March 14, 2024. The source does not reconcile the year difference.

Reported row

Chloramines

Likely source listed in report: Water additive used to control microbes
Source table: Test Results

Preservation and source notes

The source table prints Level Detected `2.00`; the note text is preserved in the row footnote rather than inferred as a formal range column.

Reported row

Copper - 90th percentile reporting

Likely source listed in report: Corrosion of household plumbing
Source table: Test Results

Preservation and source notes

Action-level and 90th-percentile semantics are preserved; no household-level claim was inferred.

Reported row

Lead - 90th percentile reporting

Likely source listed in report: Corrosion of household plumbing
Source table: Test Results

Preservation and source notes

Action-level and 90th-percentile semantics are preserved; no household-level claim was inferred.

Reported row

TTHM (Total Trihalomethanes)

Likely source listed in report: By-product of water chlorination
Source table: Test Results

Preservation and source notes

The table prints site values 32.65 and 32.92 ppb, while the page 3 narrative prints 32.65 and 36.95 ppb. The table value is preserved and the source discrepancy is disclosed.

Reported row

HAA5 Haloacetic Acids

Likely source listed in report: By-product of water chlorination
Source table: Test Results

Preservation and source notes

The two site values appear exactly as printed. Note (6) separately gives an individual analytical result range of 29.00 to 51.50 ppb.

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 of Ketchikan document is a 2025 annual water quality report for Public Water System 2120232 covering January through December 2025. Annual reports summarize a reporting period and are not live status pages.

Supporting records named in the report

Page 1 says KPU's 2025 watershed inspection, 2025 sanitary survey, and December 2025 watershed protection plan are available from the utility on request.

Source water and treatment described in the report

Page 2 describes surface water from the Ketchikan Lakes and Granite Creek drainage, followed by chlorine, ultraviolet-light, and chloramine treatment before distribution.

2023 inorganic narrative

The report says its 2023 inorganic review found barium but does not print a numeric barium result; it says the other reviewed inorganics were below the method reporting limit. No numeric result is inferred.

Turbidity event narrative

The report describes a March 14, 2024 rainfall-related turbidity event and follow-up sampling. Its table separately labels the 4.45 NTU value as 2025; the source does not reconcile that year difference.

Coliform follow-up narrative

Page 3 reports zero coliform colonies in the March 2024 follow-up samples and describes weekly distribution sampling. This is dated report narrative, not a current-status finding.

Disinfection-byproduct narrative

The report describes TTHM and HAA5 formation and quarterly sampling at two distribution locations. The TTHM narrative and table disagree on one location value, so the table value is preserved with the discrepancy disclosed.

Treatment history described in the report

The report describes chlorine, ultraviolet treatment, ammonia addition, and later treatment changes intended to reduce HAA5 formation. This is source-reported treatment history.

Definitions printed in the report

Page 4 defines the unit and regulatory abbreviations used to read the result table. Definitions do not create a current safety or compliance conclusion.

2026 HAA5 follow-up context

Page 5 includes February and May 2026 HAA5 follow-up averages of 35.78 and 40.43 ppb. Those values fall outside the 2025 reporting period and are not represented as 2025 table rows or current status.

Monitoring-waiver context

The report describes historical monitoring waivers for asbestos, dioxin, cyanide, and synthetic organic chemicals. This page does not independently determine current waiver status.

Historical radioactivity narrative

The report describes historical radioactivity sampling from 2001, 2005, and 2016 without numeric results that can be presented as report rows.

Lead inventory and sampling context

The report says KPU inspected 307 older services and found those inspected services to be non-lead. It also reports 2024 lead and copper sampling and older 2008 main samples. These statements do not determine service-line or plumbing material at a specific property.

Historical arsenic narrative

The report says arsenic was not detected at the 1 ppb level in 2012 and identifies a later sampling window. This historical narrative is not presented as a current result.

pH and corrosion-control narrative

The report states an average pH of 7.8 and a range of 7.3 to 8.2 and describes soda ash and orthophosphate corrosion control. This is report narrative rather than a regulatory-result table.

UCMR5 PFAS narrative

The report says Ketchikan participated in UCMR5 monitoring from 2023 through 2025 and that its PFAS results were below compound-specific reporting levels. It does not print compound-specific Ketchikan values or a lithium measurement.

Definitions printed in this report

ND: The report uses ND to mean that laboratory analysis did not detect the contaminant.
ppm: Parts per million; the report also equates ppm with milligrams per liter (mg/L).
ppb: Parts per billion; the report also equates ppb with micrograms per liter.
NTU: Nephelometric Turbidity Unit, used in the report as a measure of water clarity or cloudiness.
AL: Action Level: the concentration which, if exceeded, triggers treatment or other requirements a water system must follow.
TT: Treatment Technique: a required process intended to reduce the level of a contaminant in drinking water.
MCL: Maximum Contaminant Level: the highest level of a contaminant allowed in drinking water.
MCLG: Maximum Contaminant Level Goal: the level below which there is no known or expected health risk; the report says MCLGs allow a margin of safety.
MRDL: Maximum Residual Disinfectant Level: the highest level of a disinfectant allowed in drinking water.
MRDLG: Maximum Residual Disinfectant Level Goal: the level of a disinfectant below which there is no known or expected health risk; the report notes that this does not reflect disinfection benefits.
PPT: Parts per trillion.

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 report

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.

Report-period disclosure

Annual-report and row-status scope

This page summarizes the named 2025 annual report. Source-printed No cells apply to individual rows and printed periods; they do not establish live system-wide compliance, current safety, or the absence of a current notice.