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SNOHOMISH CITY OF

PWS ID: WA5380915 · Snohomish, Washington 98290

SNOHOMISH CITY OF serves 11,258 people in Snohomish, Washington using Surface Water water sources. It has 111 recorded EPA violations, including 3 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: SNOHOMISH CITY OF

SNOHOMISH CITY OF is a local-owned community water system that delivers drinking water to 11,258 residents in Snohomish, Washington (Snohomish County) through 5,154 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 111 total violations for this system , of which 3 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 105 monitoring and reporting violations are on file. The most recent violation on record dates to 2012.

The most frequently cited contaminant at this system is cis-1,2-Dichloroethylene, recorded in 5 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. SNOHOMISH CITY OF's 111 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
11,258
Total Violations
111
Health-Based Violations
3
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
5,154
County
Snohomish
School/Daycare
No
MCL Violations
0
Monitoring Violations
105
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
cis-1,2-Dichloroethylene MR 5 2006
DICHLOROMETHANE MR 5 2006
Vinyl chloride MR 5 2006
1,1,1-Trichloroethane MR 5 2006
Tetrachloroethylene MR 5 2006
CHLOROBENZENE MR 5 2006
Benzene MR 5 2006
Toluene MR 5 2006
Ethylbenzene MR 5 2006
Styrene MR 5 2006
1,1-Dichloroethylene MR 5 2006
1,2,4-Trichlorobenzene MR 5 2006
Carbon tetrachloride MR 5 2006
Trichloroethylene MR 5 2006
trans-1,2-Dichloroethylene MR 5 2006
p-Dichlorobenzene MR 5 2006
o-Dichlorobenzene MR 5 2006
1,2-Dichloroethane MR 5 2006
1,1,2-Trichloroethane MR 5 2006
1,2-Dichloropropane MR 5 2006
Surface Water Treatment Rule MR 3 2012
Surface Water Treatment Rule TT 3 2009
Coliform (TCR) MR 2 1992

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
PFDA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/7/2025 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 7/7/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFOA 7/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 7/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 7/7/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/7/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 7/7/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFPeS 7/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/7/2025 <9 µg/L 9 µg/L Not Detected
PFBS 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 7/7/2025 <0.02 µg/L 0.02 µg/L Not Detected
4:2 FTS 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 7/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/7/2025 <9 µg/L 9 µg/L Not Detected
PFEESA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 7/7/2025 <0.002 µg/L 0.002 µg/L Not Detected
8:2 FTS 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 7/7/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFDA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 7/7/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 7/7/2025 <0.008 µg/L 0.008 µg/L Not Detected
HFPO-DA 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 7/7/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFHxA 7/7/2025 <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 SNOHOMISH CITY OF.

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 WA5380915 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 SNOHOMISH CITY OF 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
2012 Surface Water Treatment Rule MR 3 SDWIS / WA5380915 / 0200
2009 Surface Water Treatment Rule TT 3 SDWIS / WA5380915 / 0200
2006 cis-1,2-Dichloroethylene MR 5 SDWIS / WA5380915 / 2380
2006 DICHLOROMETHANE MR 5 SDWIS / WA5380915 / 2964
2006 Vinyl chloride MR 5 SDWIS / WA5380915 / 2976
2006 1,1,1-Trichloroethane MR 5 SDWIS / WA5380915 / 2981
2006 Tetrachloroethylene MR 5 SDWIS / WA5380915 / 2987
2006 CHLOROBENZENE MR 5 SDWIS / WA5380915 / 2989
2006 Benzene MR 5 SDWIS / WA5380915 / 2990
2006 Toluene MR 5 SDWIS / WA5380915 / 2991
2006 Ethylbenzene MR 5 SDWIS / WA5380915 / 2992
2006 Styrene MR 5 SDWIS / WA5380915 / 2996
2006 1,1-Dichloroethylene MR 5 SDWIS / WA5380915 / 2977
2006 1,2,4-Trichlorobenzene MR 5 SDWIS / WA5380915 / 2378
2006 Carbon tetrachloride MR 5 SDWIS / WA5380915 / 2982

How SNOHOMISH CITY OF Compares

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

Metric SNOHOMISH CITY OF Washington avg Federal benchmark
Total violations 111 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 3 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 11,258 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 SNOHOMISH CITY OF water safe to drink? ▼
SNOHOMISH CITY OF (PWS ID: WA5380915) has 111 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 11,258 people using Surface Water sources.
How many people does SNOHOMISH CITY OF serve? ▼
SNOHOMISH CITY OF serves 11,258 people in Snohomish, Washington. It is a Local-owned system using Surface Water water sources with 5,154 service connections.
What type of violations does SNOHOMISH CITY OF have? ▼
SNOHOMISH CITY OF has 111 total violations: 3 health-based violations (MCL exceedances or treatment failures), 105 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in SNOHOMISH CITY OF water? ▼
No. SNOHOMISH CITY OF was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does SNOHOMISH CITY OF use? ▼
SNOHOMISH CITY OF 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.

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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