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Community Water System · PWS AK2280040

Shageluk Water System

Shageluk, Alaska 99665 - drinking water served from groundwater sources to 60 people, tracked in EPA SDWIS and UCMR5.

60
People served
980
EPA violations
13
Health-based
Untested
UCMR5 result

The verdict

EPA records 980 drinking-water violations at Shageluk Water System, 1% of them health-based - above the Alaska per-system average.

980
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
60
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Shageluk Water System

Shageluk Water System is a native american-owned community water system that delivers drinking water to 60 residents in Shageluk, Alaska (Yukon-Koyukuk Census Area County) through 40 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 980 total violations for this system , of which 13 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 759 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 Coliform (TCR), recorded in 77 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%).

Shageluk Water System's 980 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
980
Health-Based Violations
13
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
40
County
Yukon-Koyukuk Census Area
School/Daycare
No
MCL Violations
4
Monitoring Violations
759
Treatment Tech Violations
9

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 77 2015
Chlorine MR 63 2024
Revised Total Coliform Rule MON 40 2024
Nitrate MR 32 2023
Lead and Copper Rule MR 16 2025
Groundwater Rule MR 16 2025
Total Haloacetic Acids (HAA5) MR 13 2024
TTHM MR 13 2024
Total Polychlorinated Biphenyls (PCB) MR 12 2001
Picloram MR 12 2001
Pentachlorophenol MR 12 2001
Heptachlor epoxide MR 12 2001
Heptachlor MR 12 2001
ETHYLENE DIBROMIDE MR 12 2001
Dinoseb MR 12 2001
Chlordane MR 12 2001
Toxaphene MR 12 2001
Endrin MR 12 2001
2,4,5-TP MR 12 2001
BHC-GAMMA MR 12 2001
Simazine MR 12 2001
Diquat MR 12 2001
2,4-D MR 12 2001
Methoxychlor MR 12 2001
Atrazine MR 12 2001
Hexachlorocyclopentadiene MR 8 2001
2,3,7,8-TCDD MR 8 2001
HEXACHLOROBENZENE MR 8 2001
Glyphosate MR 8 2001
Endothall MR 8 2001

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 Shageluk 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 AK2280040 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 Lead and Copper Rule MR 16 SDWIS / AK2280040 / 5000
2025 Groundwater Rule MR 16 SDWIS / AK2280040 / 0700
2025 Groundwater Rule TT 3 SDWIS / AK2280040 / 0700
2024 Chlorine MR 63 SDWIS / AK2280040 / 0999
2024 Revised Total Coliform Rule MON 40 SDWIS / AK2280040 / 8000
2024 Total Haloacetic Acids (HAA5) MR 13 SDWIS / AK2280040 / 2456
2024 TTHM MR 13 SDWIS / AK2280040 / 2950
2023 Nitrate MR 32 SDWIS / AK2280040 / 1040
2023 Consumer Confidence Rule Other 8 SDWIS / AK2280040 / 7000
2023 Revised Total Coliform Rule TT 6 SDWIS / AK2280040 / 8000
2023 E. COLI MR 4 SDWIS / AK2280040 / 3014
2020 Trichloroethylene MR 7 SDWIS / AK2280040 / 2984
2020 1,1,1-Trichloroethane MR 7 SDWIS / AK2280040 / 2981
2020 p-Dichlorobenzene MR 7 SDWIS / AK2280040 / 2969
2020 Carbon tetrachloride MR 7 SDWIS / AK2280040 / 2982

How Shageluk Water System Compares

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

Metric Shageluk Water System Alaska avg Federal benchmark
Total violations 980 201.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 13 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 Shageluk Water System water safe to drink? ▼
Shageluk Water System (PWS ID: AK2280040) has 980 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 60 people using Groundwater sources.
How many people does Shageluk Water System serve? ▼
Shageluk Water System serves 60 people in Shageluk, Alaska. It is a Native American-owned system using Groundwater water sources with 40 service connections.
What type of violations does Shageluk Water System have? ▼
Shageluk Water System has 980 total violations: 13 health-based violations (MCL exceedances or treatment failures), 759 monitoring/reporting violations, and 9 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Shageluk Water System water? ▼
No PFAS testing data is available for Shageluk Water System under the EPA's UCMR5 monitoring program.
What water source does Shageluk Water System use? ▼
Shageluk 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.