Is ZILLAH CITY OF's water safe to drink?
ZILLAH CITY OF had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. Population served: 3,518, over 1,206 connections.
How this compares nationally
Out of 12,903 systems in this dataset, ZILLAH CITY OF ranks 2,362th by violation burden (82th percentile) - 44 violations total, 8 health-baseds.
How ZILLAH CITY OF compares within WA
Among the 322 WA systems in this dataset, the average is 3.7 health-based violations - ZILLAH CITY OF's 8 is above 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 ZILLAH CITY OF is from 2023-01-10 (health-based: 2023-01-10). Last reported to EPA: 06/19/2026.
What kind of problem, specifically
ZILLAH 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: Coliform (TCR); Revised Total Coliform 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 ZILLAH 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. This record - 8 health-based violations on file for ZILLAH CITY OF - 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.