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Community Water System · PWS AK2250087

Karluk Water System

Karluk, Alaska 99608-0022 - drinking water served from surface water sources to 60 people, tracked in EPA SDWIS and UCMR5.

60
People served
991
EPA violations
21
Health-based
Untested
UCMR5 result

The verdict

EPA records 991 drinking-water violations at Karluk Water System, 2% of them health-based - above the Alaska per-system average.

991
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
60
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Karluk Water System

Karluk Water System is a native american-owned community water system that delivers drinking water to 60 residents in Karluk, Alaska (Kodiak Island Borough County) through 22 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 991 total violations for this system , of which 21 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 881 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 Coliform (TCR), recorded in 138 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%).

Karluk Water System's 991 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
60
Total Violations
991
Health-Based Violations
21
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
22
County
Kodiak Island Borough
School/Daycare
No
MCL Violations
0
Monitoring Violations
881
Treatment Tech Violations
21

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 138 2012
Surface Water Treatment Rule MR 112 2024
Nitrate MR 26 2004
Surface Water Treatment Rule TT 21 2018
Mercury MR 20 2011
Barium MR 19 2003
Selenium MR 19 2003
Cadmium MR 19 2003
Fluoride MR 19 2003
Chromium MR 19 2003
Arsenic MR 18 2003
p-Dichlorobenzene MR 14 2004
Trichloroethylene MR 13 2004
1,1,1-Trichloroethane MR 13 2004
Carbon tetrachloride MR 13 2004
1,1-Dichloroethylene MR 13 2004
1,2-Dichloroethane MR 13 2004
Benzene MR 13 2004
BHC-GAMMA MR 12 1998
Toxaphene MR 12 1998
2,4,5-TP MR 12 1998
Methoxychlor MR 12 1998
2,4-D MR 12 1998
Endrin MR 12 1998
o-Dichlorobenzene MR 9 2004
CHLOROBENZENE MR 9 2004
Toluene MR 9 2004
Tetrachloroethylene MR 9 2004
Styrene MR 9 2004
Ethylbenzene MR 9 2004

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 Karluk 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 AK2250087 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 Surface Water Treatment Rule MR 112 SDWIS / AK2250087 / 0200
2024 Chlorine MR 4 SDWIS / AK2250087 / 0999
2020 Revised Total Coliform Rule MON 1 SDWIS / AK2250087 / 8000
2018 Surface Water Treatment Rule TT 21 SDWIS / AK2250087 / 0200
2014 Consumer Confidence Rule Other 8 SDWIS / AK2250087 / 7000
2012 Coliform (TCR) MR 138 SDWIS / AK2250087 / 3100
2011 Mercury MR 20 SDWIS / AK2250087 / 1035
2008 Long Term 2 Enhanced Surface Water Treatment Rule MR 1 SDWIS / AK2250087 / 0800
2004 Nitrate MR 26 SDWIS / AK2250087 / 1040
2004 p-Dichlorobenzene MR 14 SDWIS / AK2250087 / 2969
2004 Trichloroethylene MR 13 SDWIS / AK2250087 / 2984
2004 1,1,1-Trichloroethane MR 13 SDWIS / AK2250087 / 2981
2004 Carbon tetrachloride MR 13 SDWIS / AK2250087 / 2982
2004 1,1-Dichloroethylene MR 13 SDWIS / AK2250087 / 2977
2004 1,2-Dichloroethane MR 13 SDWIS / AK2250087 / 2980

How Karluk Water System Compares

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

Metric Karluk Water System Alaska avg Federal benchmark
Total violations 991 201.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 21 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 60 650 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 Karluk Water System water safe to drink? ▼
Karluk Water System (PWS ID: AK2250087) has 991 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 60 people using Surface Water sources.
How many people does Karluk Water System serve? ▼
Karluk Water System serves 60 people in Karluk, Alaska. It is a Native American-owned system using Surface Water water sources with 22 service connections.
What type of violations does Karluk Water System have? ▼
Karluk Water System has 991 total violations: 21 health-based violations (MCL exceedances or treatment failures), 881 monitoring/reporting violations, and 21 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Karluk Water System water? ▼
No PFAS testing data is available for Karluk Water System under the EPA's UCMR5 monitoring program.
What water source does Karluk Water System use? ▼
Karluk Water System 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.