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SNOQUALMIE PASS UTILITY DISTRICT

PWS ID: WA5381048 · Snoqualmie Pass, Washington 98068

SNOQUALMIE PASS UTILITY DISTRICT serves 5,805 people in Snoqualmie Pass, Washington using Groundwater water sources. It has 322 recorded EPA violations, including 10 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: SNOQUALMIE PASS UTILITY DISTRICT

SNOQUALMIE PASS UTILITY DISTRICT is a local-owned community water system that delivers drinking water to 5,805 residents in Snoqualmie Pass, Washington (King County) through 902 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 322 total violations for this system , of which 10 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 305 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Arsenic, recorded in 35 violations (MR). 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 PASS UTILITY DISTRICT's 322 violations sit above 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
5,805
Total Violations
322
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
902
County
King
School/Daycare
No
MCL Violations
10
Monitoring Violations
305
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MR 35 2023
Nitrate MR 13 2007
Coliform (TCR) MCL 10 1996
Pentachlorophenol MR 7 2014
2,4,5-TP MR 7 2014
BHC-GAMMA MR 6 2005
Toxaphene MR 6 2005
Picloram MR 6 2014
Dinoseb MR 6 2014
Dalapon MR 6 2014
Coliform (TCR) MR 6 2006
Endrin MR 6 2005
Methoxychlor MR 6 2005
cis-1,2-Dichloroethylene MR 5 2005
DICHLOROMETHANE MR 5 2005
p-Dichlorobenzene MR 5 2005
Vinyl chloride MR 5 2005
1,2-Dichloroethane MR 5 2005
1,1,1-Trichloroethane MR 5 2005
Carbon tetrachloride MR 5 2005
Tetrachloroethylene MR 5 2005
CHLOROBENZENE MR 5 2005
Toluene MR 5 2005
Styrene MR 5 2005
Di(2-ethylhexyl) adipate MR 5 2005
Simazine MR 5 2005
Atrazine MR 5 2005
LASSO MR 5 2005
Heptachlor MR 5 2005
HEXACHLOROBENZENE MR 5 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 5/20/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/20/2024 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 5/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/20/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFBA 5/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 5/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/20/2024 <0.008 µg/L 0.008 µg/L Not Detected
NFDHA 5/20/2024 <0.02 µg/L 0.02 µg/L Not Detected
9Cl-PF3ONS 5/20/2024 <0.002 µg/L 0.002 µg/L Not Detected
lithium 5/20/2024 <9 µg/L 9 µg/L Not Detected
PFMPA 5/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 5/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 5/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 5/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 5/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 5/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 11/19/2024 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 11/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 11/19/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFUnA 11/19/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 11/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 11/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 11/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 11/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 11/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 11/19/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 11/19/2024 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 11/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFDoA 11/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 11/19/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHxA 11/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 11/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 11/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 11/19/2024 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 11/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
lithium 11/19/2024 <9 µg/L 9 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 PASS UTILITY DISTRICT.

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 WA5381048 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 PASS UTILITY DISTRICT 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
2023 Arsenic MR 35 SDWIS / WA5381048 / 1005
2020 Revised Total Coliform Rule MON 1 SDWIS / WA5381048 / 8000
2016 Consumer Confidence Rule Other 4 SDWIS / WA5381048 / 7000
2014 Pentachlorophenol MR 7 SDWIS / WA5381048 / 2326
2014 2,4,5-TP MR 7 SDWIS / WA5381048 / 2110
2014 Picloram MR 6 SDWIS / WA5381048 / 2040
2014 Dinoseb MR 6 SDWIS / WA5381048 / 2041
2014 Dalapon MR 6 SDWIS / WA5381048 / 2031
2007 Nitrate MR 13 SDWIS / WA5381048 / 1040
2006 Coliform (TCR) MR 6 SDWIS / WA5381048 / 3100
2005 BHC-GAMMA MR 6 SDWIS / WA5381048 / 2010
2005 Toxaphene MR 6 SDWIS / WA5381048 / 2020
2005 Endrin MR 6 SDWIS / WA5381048 / 2005
2005 Methoxychlor MR 6 SDWIS / WA5381048 / 2015
2005 cis-1,2-Dichloroethylene MR 5 SDWIS / WA5381048 / 2380

How SNOQUALMIE PASS UTILITY DISTRICT Compares

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

Metric SNOQUALMIE PASS UTILITY DISTRICT Washington avg Federal benchmark
Total violations 322 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 5,805 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 PASS UTILITY DISTRICT water safe to drink? ▼
SNOQUALMIE PASS UTILITY DISTRICT (PWS ID: WA5381048) has 322 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,805 people using Groundwater sources.
How many people does SNOQUALMIE PASS UTILITY DISTRICT serve? ▼
SNOQUALMIE PASS UTILITY DISTRICT serves 5,805 people in Snoqualmie Pass, Washington. It is a Local-owned system using Groundwater water sources with 902 service connections.
What type of violations does SNOQUALMIE PASS UTILITY DISTRICT have? ▼
SNOQUALMIE PASS UTILITY DISTRICT has 322 total violations: 10 health-based violations (MCL exceedances or treatment failures), 305 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in SNOQUALMIE PASS UTILITY DISTRICT water? ▼
No. SNOQUALMIE PASS UTILITY DISTRICT was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does SNOQUALMIE PASS UTILITY DISTRICT use? ▼
SNOQUALMIE PASS UTILITY DISTRICT 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.

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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.

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