PlainWater
States → Washington

SNOQUALMIE WATER

PWS ID: WA5381080 · SNOQUALIME, Washington 98065

SNOQUALMIE WATER serves 15,848 people in SNOQUALIME, Washington using Groundwater water sources. It has 39 recorded EPA violations, including 10 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: SNOQUALMIE WATER

SNOQUALMIE WATER is a local-owned community water system that delivers drinking water to 15,848 residents in SNOQUALIME, Washington (King County) through 5,386 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 39 total violations for this system , of which 10 (26%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 24 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 10 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. SNOQUALMIE WATER's 39 violations sit below the Washington average. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%). 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
15,848
Total Violations
39
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
5,386
County
King
School/Daycare
No
MCL Violations
10
Monitoring Violations
24
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 10 2003
Lead and Copper Rule MR 10 2007
Consumer Confidence Rule Other 5 2016
1,2-DIBROMO-3-CHLOROPROPANE MR 4 2007
ETHYLENE DIBROMIDE MR 4 2007
Diquat MR 4 2007
Coliform (TCR) MR 1 1992
Gross Alpha, Excl. Radon and U MR 1 1979

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 5/31/2023 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/31/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/31/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFPeS 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFTrDA 5/31/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFHxS 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/31/2023 <9 µg/L 9 µg/L Not Detected
NEtFOSAA 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 5/31/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFDA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 5/31/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFDoA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/3/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFEESA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/3/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 5/3/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFDoA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/3/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/3/2023 <0.003 µg/L 0.003 µg/L 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 SNOQUALMIE WATER.

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 WA5381080 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health — Office of Drinking Water is the primacy agency that licenses and inspects SNOQUALMIE WATER under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health — Office of Drinking Water

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
2016 Consumer Confidence Rule Other 5 SDWIS / WA5381080 / 7000
2007 Lead and Copper Rule MR 10 SDWIS / WA5381080 / 5000
2007 1,2-DIBROMO-3-CHLOROPROPANE MR 4 SDWIS / WA5381080 / 2931
2007 ETHYLENE DIBROMIDE MR 4 SDWIS / WA5381080 / 2946
2007 Diquat MR 4 SDWIS / WA5381080 / 2032
2003 Coliform (TCR) MCL 10 SDWIS / WA5381080 / 3100
1992 Coliform (TCR) MR 1 SDWIS / WA5381080 / 3100
1979 Gross Alpha, Excl. Radon and U MR 1 SDWIS / WA5381080 / 4000

How SNOQUALMIE WATER Compares

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

Metric SNOQUALMIE WATER Washington avg Federal benchmark
Total violations 39 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 10 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 39.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 15,848 2,137 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is SNOQUALMIE WATER water safe to drink? ▼
SNOQUALMIE WATER (PWS ID: WA5381080) has 39 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 15,848 people using Groundwater sources.
How many people does SNOQUALMIE WATER serve? ▼
SNOQUALMIE WATER serves 15,848 people in SNOQUALIME, Washington. It is a Local-owned system using Groundwater water sources with 5,386 service connections.
What type of violations does SNOQUALMIE WATER have? ▼
SNOQUALMIE WATER has 39 total violations: 10 health-based violations (MCL exceedances or treatment failures), 24 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in SNOQUALMIE WATER water? ▼
No. SNOQUALMIE WATER was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does SNOQUALMIE WATER use? ▼
SNOQUALMIE WATER 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.

Explore PlainWater

Water in Washington

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for Washington

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial