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Community Water System · PWS AK2261444

Chignik Lagoon Water System

Chignik Lagoon, Alaska 99565 - drinking water served from groundwater sources to 273 people, tracked in EPA SDWIS and UCMR5.

273
People served
944
EPA violations
15
Health-based
Untested
UCMR5 result

The verdict

EPA records 944 drinking-water violations at Chignik Lagoon Water System, 2% of them health-based - above the Alaska per-system average.

944
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
273
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Chignik Lagoon Water System

Chignik Lagoon Water System is a native american-owned community water system that delivers drinking water to 273 residents in Chignik Lagoon, Alaska (Lake and Peninsula Borough County) through 83 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 944 total violations for this system , of which 15 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 793 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Chlorine, recorded in 62 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%).

Chignik Lagoon Water System's 944 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
273
Total Violations
944
Health-Based Violations
15
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
83
County
Lake and Peninsula Borough
School/Daycare
No
MCL Violations
2
Monitoring Violations
793
Treatment Tech Violations
13

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 62 2025
Surface Water Treatment Rule MR 53 2003
Coliform (TCR) MR 50 2015
Nitrate MR 20 2009
Revised Total Coliform Rule MON 17 2025
p-Dichlorobenzene MR 16 2020
1,1-Dichloroethylene MR 16 2020
Trichloroethylene MR 16 2020
Benzene MR 16 2020
1,1,1-Trichloroethane MR 16 2020
Carbon tetrachloride MR 16 2020
1,2-Dichloroethane MR 15 2020
Toluene MR 14 2020
o-Dichlorobenzene MR 14 2020
CHLOROBENZENE MR 14 2020
Tetrachloroethylene MR 14 2020
1,2-Dichloropropane MR 14 2020
cis-1,2-Dichloroethylene MR 14 2020
trans-1,2-Dichloroethylene MR 14 2020
Xylenes, Total MR 14 2020
Styrene MR 14 2020
Ethylbenzene MR 14 2020
DICHLOROMETHANE MR 12 2020
1,2,4-Trichlorobenzene MR 12 2020
1,1,2-Trichloroethane MR 12 2020
Lead and Copper Rule MR 9 2025
Dalapon MR 8 2010
Diquat MR 8 2010
Simazine MR 8 2010
Hexachlorocyclopentadiene MR 8 2010

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 Chignik Lagoon Water System.

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 AK2261444 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
2025 Chlorine MR 62 SDWIS / AK2261444 / 0999
2025 Revised Total Coliform Rule MON 17 SDWIS / AK2261444 / 8000
2025 Lead and Copper Rule MR 9 SDWIS / AK2261444 / 5000
2021 Consumer Confidence Rule Other 4 SDWIS / AK2261444 / 7000
2020 p-Dichlorobenzene MR 16 SDWIS / AK2261444 / 2969
2020 1,1-Dichloroethylene MR 16 SDWIS / AK2261444 / 2977
2020 Trichloroethylene MR 16 SDWIS / AK2261444 / 2984
2020 Benzene MR 16 SDWIS / AK2261444 / 2990
2020 1,1,1-Trichloroethane MR 16 SDWIS / AK2261444 / 2981
2020 Carbon tetrachloride MR 16 SDWIS / AK2261444 / 2982
2020 1,2-Dichloroethane MR 15 SDWIS / AK2261444 / 2980
2020 Toluene MR 14 SDWIS / AK2261444 / 2991
2020 o-Dichlorobenzene MR 14 SDWIS / AK2261444 / 2968
2020 CHLOROBENZENE MR 14 SDWIS / AK2261444 / 2989
2020 Tetrachloroethylene MR 14 SDWIS / AK2261444 / 2987

How Chignik Lagoon Water System Compares

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

Metric Chignik Lagoon Water System Alaska avg Federal benchmark
Total violations 944 201.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 15 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 273 650 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 Chignik Lagoon Water System water safe to drink? ▼
Chignik Lagoon Water System (PWS ID: AK2261444) has 944 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 273 people using Groundwater sources.
How many people does Chignik Lagoon Water System serve? ▼
Chignik Lagoon Water System serves 273 people in Chignik Lagoon, Alaska. It is a Native American-owned system using Groundwater water sources with 83 service connections.
What type of violations does Chignik Lagoon Water System have? ▼
Chignik Lagoon Water System has 944 total violations: 15 health-based violations (MCL exceedances or treatment failures), 793 monitoring/reporting violations, and 13 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Chignik Lagoon Water System water? ▼
No PFAS testing data is available for Chignik Lagoon Water System under the EPA's UCMR5 monitoring program.
What water source does Chignik Lagoon Water System use? ▼
Chignik Lagoon Water System uses Groundwater 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.