PlainWater
States → Alaska

Community Water System · PWS AK2260333

South Naknek Water System

South Naknek, Alaska 99670 - drinking water served from groundwater sources to 66 people, tracked in EPA SDWIS and UCMR5.

66
People served
726
EPA violations
3
Health-based
Untested
UCMR5 result

The verdict

EPA records 726 drinking-water violations at South Naknek Water System - above the Alaska per-system average.

726
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
66
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: South Naknek Water System

South Naknek Water System is a native american-owned community water system that delivers drinking water to 66 residents in South Naknek, Alaska (Bristol Bay Borough County) through 15 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 726 total violations for this system , of which 3 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 629 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 80 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%).

South Naknek Water System's 726 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
66
Total Violations
726
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
15
County
Bristol Bay Borough
School/Daycare
No
MCL Violations
1
Monitoring Violations
629
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 80 2009
Lead and Copper Rule MR 25 2023
Nitrate MR 23 2023
Revised Total Coliform Rule MON 16 2022
Simazine MR 13 2010
Picloram MR 13 2010
Diquat MR 13 2010
Dinoseb MR 13 2010
Heptachlor epoxide MR 13 2010
Heptachlor MR 13 2010
ETHYLENE DIBROMIDE MR 13 2010
Chlordane MR 13 2010
Atrazine MR 13 2010
Toxaphene MR 13 2010
BHC-GAMMA MR 13 2010
Total Polychlorinated Biphenyls (PCB) MR 13 2010
Pentachlorophenol MR 13 2010
2,4-D MR 13 2010
Endrin MR 13 2010
2,4,5-TP MR 13 2010
Methoxychlor MR 13 2010
Dalapon MR 8 2010
Endothall MR 8 2010
OXAMYL MR 8 2010
Benzo(a)pyrene MR 8 2010
1,2-DIBROMO-3-CHLOROPROPANE MR 8 2010
Di(2-ethylhexyl) adipate MR 8 2010
Hexachlorocyclopentadiene MR 8 2010
LASSO MR 8 2010
Consumer Confidence Rule Other 8 2019

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 South Naknek 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 AK2260333 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 Groundwater Rule TT 2 SDWIS / AK2260333 / 0700
2023 Lead and Copper Rule MR 25 SDWIS / AK2260333 / 5000
2023 Nitrate MR 23 SDWIS / AK2260333 / 1040
2022 Revised Total Coliform Rule MON 16 SDWIS / AK2260333 / 8000
2020 1,1,1-Trichloroethane MR 5 SDWIS / AK2260333 / 2981
2020 Carbon tetrachloride MR 5 SDWIS / AK2260333 / 2982
2020 Trichloroethylene MR 5 SDWIS / AK2260333 / 2984
2020 Benzene MR 5 SDWIS / AK2260333 / 2990
2020 1,2-Dichloroethane MR 5 SDWIS / AK2260333 / 2980
2020 p-Dichlorobenzene MR 5 SDWIS / AK2260333 / 2969
2020 1,1-Dichloroethylene MR 5 SDWIS / AK2260333 / 2977
2020 DICHLOROMETHANE MR 4 SDWIS / AK2260333 / 2964
2020 1,1,2-Trichloroethane MR 4 SDWIS / AK2260333 / 2985
2020 o-Dichlorobenzene MR 4 SDWIS / AK2260333 / 2968
2020 Tetrachloroethylene MR 4 SDWIS / AK2260333 / 2987

How South Naknek Water System Compares

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

Metric South Naknek Water System Alaska avg Federal benchmark
Total violations 726 201.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 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 66 650 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 South Naknek Water System water safe to drink? ▼
South Naknek Water System (PWS ID: AK2260333) has 726 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 66 people using Groundwater sources.
How many people does South Naknek Water System serve? ▼
South Naknek Water System serves 66 people in South Naknek, Alaska. It is a Native American-owned system using Groundwater water sources with 15 service connections.
What type of violations does South Naknek Water System have? ▼
South Naknek Water System has 726 total violations: 3 health-based violations (MCL exceedances or treatment failures), 629 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in South Naknek Water System water? ▼
No PFAS testing data is available for South Naknek Water System under the EPA's UCMR5 monitoring program.
What water source does South Naknek Water System use? ▼
South Naknek 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.