PlainWater
States → Alaska

Community Water System · PWS AK2224646

Wasilla Water System

Wasilla, Alaska 99654 - drinking water served from groundwater sources to 18,492 people, tracked in EPA SDWIS and UCMR5.

18,492
People served
224
EPA violations
6
Health-based
1 PFAS
UCMR5 result

The verdict

EPA records 224 drinking-water violations at Wasilla Water System, 3% of them health-based - above the Alaska per-system average, and UCMR5 testing detected 1 PFAS compound.

224
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
18,492
People served by this system
1
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wasilla Water System

Wasilla Water System is a local-owned community water system that delivers drinking water to 18,492 residents in Wasilla, Alaska (Matanuska-Susitna Borough County) through 1,833 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 224 total violations for this system , of which 6 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 162 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 Gross Alpha, Excl. Radon and U, recorded in 9 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 4.2 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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%).

Wasilla Water System's 224 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.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
18,492
Total Violations
224
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,833
County
Matanuska-Susitna Borough
School/Daycare
No
MCL Violations
5
Monitoring Violations
162
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Gross Alpha, Excl. Radon and U MR 9 2019
Combined Uranium MR 8 2019
Combined Radium (-226 and -228) MR 8 2019
Fluoride MR 5 2020
o-Dichlorobenzene MR 5 2020
p-Dichlorobenzene MR 5 2020
1,2-Dichloroethane MR 5 2020
Carbon tetrachloride MR 5 2020
1,1,2-Trichloroethane MR 5 2020
Tetrachloroethylene MR 5 2020
CHLOROBENZENE MR 5 2020
Ethylbenzene MR 5 2020
Styrene MR 5 2020
cis-1,2-Dichloroethylene MR 5 2020
Xylenes, Total MR 5 2020
1,1-Dichloroethylene MR 5 2020
1,1,1-Trichloroethane MR 5 2020
1,2-Dichloropropane MR 5 2020
Trichloroethylene MR 5 2020
Toluene MR 5 2020
1,2,4-Trichlorobenzene MR 5 2020
DICHLOROMETHANE MR 5 2020
Vinyl chloride MR 5 2020
Benzene MR 5 2020
Arsenic MCL 5 2014
trans-1,2-Dichloroethylene MR 5 2020
Arsenic MR 3 2021
Revised Total Coliform Rule MON 3 2025
CYANIDE MR 3 2020
Barium MR 2 1990

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 290 samples detected PFAS.

Contaminant Date Result MRL Status
6:2 FTS 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
PFBA 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 8/23/2023 <2.00 ppt 2.00 ppt Not Detected
PFOA 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
PFDoA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/23/2023 <8.00 ppt 8.00 ppt Not Detected
NMeFOSAA 8/23/2023 <6.00 ppt 6.00 ppt Not Detected
PFTrDA 8/23/2023 <7.00 ppt 7.00 ppt Not Detected
PFHpS 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 8/23/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
PFMBA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/23/2023 <2.00 ppt 2.00 ppt Not Detected
PFDA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 8/23/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 8/23/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 8/23/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 8/15/2023 <5.00 ppt 5.00 ppt Not Detected
PFOA 8/15/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/15/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 8/15/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/15/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 8/15/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/15/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 8/15/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/15/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/15/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 8/15/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 8/15/2023 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 8/15/2023 <6.00 ppt 6.00 ppt Not Detected
8:2 FTS 8/15/2023 <5.00 ppt 5.00 ppt Not Detected
PFMBA 8/15/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 8/15/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 8/15/2023 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 8/15/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 8/15/2023 <4.00 ppt 4.00 ppt Not Detected
PFDoA 8/15/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/15/2023 <3.00 ppt 3.00 ppt Not Detected

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 Wasilla 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 AK2224646 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 Revised Total Coliform Rule MON 3 SDWIS / AK2224646 / 8000
2021 Arsenic MR 3 SDWIS / AK2224646 / 1005
2020 Fluoride MR 5 SDWIS / AK2224646 / 1025
2020 o-Dichlorobenzene MR 5 SDWIS / AK2224646 / 2968
2020 p-Dichlorobenzene MR 5 SDWIS / AK2224646 / 2969
2020 1,2-Dichloroethane MR 5 SDWIS / AK2224646 / 2980
2020 Carbon tetrachloride MR 5 SDWIS / AK2224646 / 2982
2020 1,1,2-Trichloroethane MR 5 SDWIS / AK2224646 / 2985
2020 Tetrachloroethylene MR 5 SDWIS / AK2224646 / 2987
2020 CHLOROBENZENE MR 5 SDWIS / AK2224646 / 2989
2020 Ethylbenzene MR 5 SDWIS / AK2224646 / 2992
2020 Styrene MR 5 SDWIS / AK2224646 / 2996
2020 cis-1,2-Dichloroethylene MR 5 SDWIS / AK2224646 / 2380
2020 Xylenes, Total MR 5 SDWIS / AK2224646 / 2955
2020 1,1-Dichloroethylene MR 5 SDWIS / AK2224646 / 2977

How Wasilla Water System Compares

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

Metric Wasilla Water System Alaska avg Federal benchmark
Total violations 224 201.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 33.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 18,492 650 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 Wasilla Water System water safe to drink? ▼
Wasilla Water System (PWS ID: AK2224646) has 224 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 18,492 people using Groundwater sources.
How many people does Wasilla Water System serve? ▼
Wasilla Water System serves 18,492 people in Wasilla, Alaska. It is a Local-owned system using Groundwater water sources with 1,833 service connections.
What type of violations does Wasilla Water System have? ▼
Wasilla Water System has 224 total violations: 6 health-based violations (MCL exceedances or treatment failures), 162 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wasilla Water System water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in Wasilla Water System's water supply: PFHxS. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Wasilla Water System use? ▼
Wasilla 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.