SNOHOMISH CITY OF: EPA violation history, explained
SNOHOMISH CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 16,367 people get their water from it, across 5,482 connections.
How this compares nationally
28 total violations and 3 health-based ones put SNOHOMISH CITY OF at the 62th percentile nationally for violation burden, rank 4,940 of 12,903.
How SNOHOMISH CITY OF compares within WA
WA's 322 covered systems average 3.7 health-based violations each; SNOHOMISH CITY OF carries 3, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for SNOHOMISH CITY OF is from 2012-01-10 (health-based: 2009-01-01). Last reported to EPA: 06/19/2026.
What kind of problem, specifically
SNOHOMISH CITY OF's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Surface Water Treatment Rule
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What this data is and is not
This is what SNOHOMISH CITY OF reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Between the utility's meter and SNOHOMISH CITY OF's customers' taps is household plumbing, invisible to a system-level record ranked 4,940th of 12,903 by violation count. The guide to what this data misses covers that gap.