KING COUNTY WATER DISTRICT #20: EPA violation history, explained
KING COUNTY WATER DISTRICT #20 has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 48,469, over 14,783 connections.
Ranked against every other system in this dataset
2 total violations and 1 health-based ones put KING COUNTY WATER DISTRICT #20 at the 30th percentile nationally for violation burden, rank 9,084 of 12,903.
How KING COUNTY WATER DISTRICT #20 compares within WA
Among the 322 WA systems in this dataset, the average is 3.7 health-based violations - KING COUNTY WATER DISTRICT #20's 1 is at or below that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for KING COUNTY WATER DISTRICT #20 is from 2003-01-07 (health-based: 2003-01-07). Last reported to EPA: 06/19/2026.
What kind of problem, specifically
KING COUNTY WATER DISTRICT #20'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: Coliform (TCR)
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
KING COUNTY WATER DISTRICT #20's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. This record - 1 health-based violation on file for KING COUNTY WATER DISTRICT #20 - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.