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Community Water System · PWS AK2340361

Shungnak Water System

Shungnak, Alaska 99773 - drinking water served from surface water sources to 299 people, tracked in EPA SDWIS and UCMR5.

299
People served
1,360
EPA violations
56
Health-based
Untested
UCMR5 result

The verdict

EPA records 1,360 drinking-water violations at Shungnak Water System, 4% of them health-based - above the Alaska per-system average.

1,360
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
299
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Shungnak Water System

Shungnak Water System is a native american-owned community water system that delivers drinking water to 299 residents in Shungnak, Alaska (Northwest Arctic Borough County) through 68 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 1,360 total violations for this system , of which 56 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,161 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 Surface Water Treatment Rule, recorded in 152 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%).

Shungnak Water System's 1,360 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
299
Total Violations
1,360
Health-Based Violations
56
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
68
County
Northwest Arctic Borough
School/Daycare
No
MCL Violations
8
Monitoring Violations
1,161
Treatment Tech Violations
48

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 152 2025
Surface Water Treatment Rule TT 48 2023
Coliform (TCR) MR 34 2014
Toxaphene MR 27 2001
BHC-GAMMA MR 27 2001
Methoxychlor MR 27 2001
2,4,5-TP MR 27 2001
2,4-D MR 26 2001
Pentachlorophenol MR 24 2001
Atrazine MR 24 2001
Lead and Copper Rule MR 24 2025
Heptachlor MR 24 2001
Chlordane MR 24 2001
Total Polychlorinated Biphenyls (PCB) MR 24 2001
Heptachlor epoxide MR 23 2001
Nitrate MR 22 2022
Interim Enhanced Surface Water Treatment Rule MR 21 2025
ETHYLENE DIBROMIDE MR 14 2001
Endrin MR 14 2001
Arsenic MR 14 2008
1,2,4-Trichlorobenzene MR 13 2023
Xylenes, Total MR 13 2023
Tetrachloroethylene MR 13 2023
cis-1,2-Dichloroethylene MR 13 2023
trans-1,2-Dichloroethylene MR 13 2023
1,1-Dichloroethylene MR 13 2023
Trichloroethylene MR 13 2023
o-Dichlorobenzene MR 13 2023
CHLOROBENZENE MR 13 2023
Fluoride MR 13 1991

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 Shungnak 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 AK2340361 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 Surface Water Treatment Rule MR 152 SDWIS / AK2340361 / 0200
2025 Lead and Copper Rule MR 24 SDWIS / AK2340361 / 5000
2025 Interim Enhanced Surface Water Treatment Rule MR 21 SDWIS / AK2340361 / 0300
2023 Surface Water Treatment Rule TT 48 SDWIS / AK2340361 / 0200
2023 1,2,4-Trichlorobenzene MR 13 SDWIS / AK2340361 / 2378
2023 Xylenes, Total MR 13 SDWIS / AK2340361 / 2955
2023 Tetrachloroethylene MR 13 SDWIS / AK2340361 / 2987
2023 cis-1,2-Dichloroethylene MR 13 SDWIS / AK2340361 / 2380
2023 trans-1,2-Dichloroethylene MR 13 SDWIS / AK2340361 / 2979
2023 1,1-Dichloroethylene MR 13 SDWIS / AK2340361 / 2977
2023 Trichloroethylene MR 13 SDWIS / AK2340361 / 2984
2023 o-Dichlorobenzene MR 13 SDWIS / AK2340361 / 2968
2023 CHLOROBENZENE MR 13 SDWIS / AK2340361 / 2989
2023 p-Dichlorobenzene MR 13 SDWIS / AK2340361 / 2969
2023 1,1,1-Trichloroethane MR 13 SDWIS / AK2340361 / 2981

How Shungnak Water System Compares

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

Metric Shungnak Water System Alaska avg Federal benchmark
Total violations 1,360 201.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 56 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 299 650 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 Shungnak Water System water safe to drink? ▼
Shungnak Water System (PWS ID: AK2340361) has 1360 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 299 people using Surface Water sources.
How many people does Shungnak Water System serve? ▼
Shungnak Water System serves 299 people in Shungnak, Alaska. It is a Native American-owned system using Surface Water water sources with 68 service connections.
What type of violations does Shungnak Water System have? ▼
Shungnak Water System has 1,360 total violations: 56 health-based violations (MCL exceedances or treatment failures), 1,161 monitoring/reporting violations, and 48 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Shungnak Water System water? ▼
No PFAS testing data is available for Shungnak Water System under the EPA's UCMR5 monitoring program.
What water source does Shungnak Water System use? ▼
Shungnak 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.