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Community Water System · PWS AK2120606

Kasaan

Kasaan, Alaska 99950 - drinking water served from surface water sources to 46 people, tracked in EPA SDWIS and UCMR5.

46
People served
596
EPA violations
94
Health-based
Untested
UCMR5 result

The verdict

EPA records 596 drinking-water violations at Kasaan, 16% of them health-based - above the Alaska per-system average.

596
Total EPA violations on record
16%
Health-based (MCL / treatment failure)
46
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Kasaan

Kasaan is a native american-owned community water system that delivers drinking water to 46 residents in Kasaan, Alaska (Ketchikan Gateway Borough County) through 39 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 596 total violations for this system , of which 94 (16%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 373 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 106 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Alaska, EPA tracks 1,326 public water systems serving 862,218 people, with 267,144 cumulative violations and 13,963 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 201.5 violations. Statewide, 10 of 30 UCMR5-tested systems have reported PFAS detections (33.3%).

Kasaan's 596 violations sit above the Alaska average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
46
Total Violations
596
Health-Based Violations
94
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
39
County
Ketchikan Gateway Borough
School/Daycare
No
MCL Violations
50
Monitoring Violations
373
Treatment Tech Violations
44

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 106 2022
Interim Enhanced Surface Water Treatment Rule MR 56 2022
Surface Water Treatment Rule TT 44 2017
Total Haloacetic Acids (HAA5) MCL 36 2019
Coliform (TCR) MR 24 2015
Chlorine MR 23 2022
Total Haloacetic Acids (HAA5) MR 20 2021
Consumer Confidence Rule Other 16 2021
TTHM MR 16 2021
TTHM MCL 14 2018
Revised Total Coliform Rule MON 14 2024
Lead and Copper Rule MR 8 2019
Nitrate MR 6 2013
Fluoride MR 5 1992
Arsenic MR 5 2011
E. COLI MR 4 2018
Cadmium MR 3 1992
Mercury MR 3 1992
Barium MR 3 1992
Selenium MR 3 1992
Chromium MR 3 1992
1,2,4-Trichlorobenzene MR 3 2014
Xylenes, Total MR 3 2014
trans-1,2-Dichloroethylene MR 3 2014
p-Dichlorobenzene MR 3 2014
1,1,1-Trichloroethane MR 3 2014
Carbon tetrachloride MR 3 2014
1,2-Dichloropropane MR 3 2014
Trichloroethylene MR 3 2014
1,1,2-Trichloroethane MR 3 2014

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Kasaan.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID AK2120606 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Alaska Drinking Water Authority

Alaska's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find AK regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Revised Total Coliform Rule MON 14 SDWIS / AK2120606 / 8000
2022 Surface Water Treatment Rule MR 106 SDWIS / AK2120606 / 0200
2022 Interim Enhanced Surface Water Treatment Rule MR 56 SDWIS / AK2120606 / 0300
2022 Chlorine MR 23 SDWIS / AK2120606 / 0999
2021 Total Haloacetic Acids (HAA5) MR 20 SDWIS / AK2120606 / 2456
2021 Consumer Confidence Rule Other 16 SDWIS / AK2120606 / 7000
2021 TTHM MR 16 SDWIS / AK2120606 / 2950
2019 Total Haloacetic Acids (HAA5) MCL 36 SDWIS / AK2120606 / 2456
2019 Lead and Copper Rule MR 8 SDWIS / AK2120606 / 5000
2018 TTHM MCL 14 SDWIS / AK2120606 / 2950
2018 E. COLI MR 4 SDWIS / AK2120606 / 3014
2017 Surface Water Treatment Rule TT 44 SDWIS / AK2120606 / 0200
2016 Revised Total Coliform Rule Other 1 SDWIS / AK2120606 / 8000
2015 Coliform (TCR) MR 24 SDWIS / AK2120606 / 3100
2014 1,2,4-Trichlorobenzene MR 3 SDWIS / AK2120606 / 2378

How Kasaan Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Kasaan Alaska avg Federal benchmark
Total violations 596 201.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 94 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 33.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 46 650 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,326 regulated public water systems in Alaska.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Kasaan water safe to drink? ▼
Kasaan (PWS ID: AK2120606) has 596 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 46 people using Surface Water sources.
How many people does Kasaan serve? ▼
Kasaan serves 46 people in Kasaan, Alaska. It is a Native American-owned system using Surface Water water sources with 39 service connections.
What type of violations does Kasaan have? ▼
Kasaan has 596 total violations: 94 health-based violations (MCL exceedances or treatment failures), 373 monitoring/reporting violations, and 44 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Kasaan water? ▼
No PFAS testing data is available for Kasaan under the EPA's UCMR5 monitoring program.
What water source does Kasaan use? ▼
Kasaan uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.