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Tap water quality report

Snohomish City of

EPA monitoring tested this supplier for 44 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

44
contaminants tested
9
detected
16,367
people served
3
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
SWP
Ownership
Local government
Counties served
Snohomish

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

3
health-based violations
108
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Archived 2009-01-01 → 2009-01-31
TT Health-based Archived 2006-05-01 → 2006-05-31
TT Health-based Archived 1997-10-01 → 1997-10-31
MR Monitoring Resolved 2012-10-01 → 2012-10-31
MR Monitoring Resolved 2012-10-01 → 2012-10-31
MR Monitoring Archived 2006-05-01 → 2006-05-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
78.505 µg/L 98%
of the EPA limit 80 µg/L
worst single sample: 87.3 µg/L
120/120 SYR4 2012–2019
Chloroform
72.3 µg/L
No EPA limit set
worst single sample: 83.9 µg/L
119/119 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
46.46 µg/L 77%
of the EPA limit 60 µg/L
worst single sample: 58.2 µg/L
119/120 SYR4 2012–2019
Trichloroacetic Acid
30.96 µg/L
No EPA limit set
worst single sample: 35.7 µg/L
118/119 SYR4 2012–2019
Dichloroacetic Acid
18.625 µg/L
No EPA limit set
worst single sample: 21.4 µg/L
116/118 SYR4 2012–2019
Bromodichloromethane
3.2 µg/L
No EPA limit set
worst single sample: 4.3 µg/L
108/108 SYR4 2012–2019
Monochloroacetic Acid
3.8 µg/L
No EPA limit set
 19/119 SYR4 2012–2019
Lead
0.00080 mg/L 5.3%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2018
Copper
0.9000 µg/L 0.1%
of the EPA limit 1300 µg/L
 1/1 SYR4 2013
35 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromoformDibromoacetic AcidDibromochloromethaneHfpo-DaLeadMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
Timothy Jackson

Frequently asked questions about Snohomish City of

Is Snohomish City of tap water safe to drink?

EPA monitoring detected 9 contaminants in Snohomish City of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Snohomish City of's water?

EPA monitoring detected TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Snohomish City of serve?

Snohomish City of reports serving 16,367 people in Washington, per its EPA record.

Has Snohomish City of had any water quality violations?

The EPA has 108 violations on file for Snohomish City of, of which 3 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.