Is KELSO CITY OF's water safe to drink?
KELSO CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 15,775 people get their water from it, across 5,082 connections.
How this compares nationally
13 total violations and 1 health-based ones put KELSO CITY OF at the 38th percentile nationally for violation burden, rank 8,041 of 12,903.
How KELSO CITY OF compares within WA
KELSO CITY OF's 1 health-based violations sit within the WA average of 3.7, across 322 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for KELSO CITY OF is from 2018-01-12 (health-based: 2000-01-01). Last reported to EPA: 06/19/2026.
What kind of problem, specifically
KELSO 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
Everything on this page is KELSO CITY OF's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 1 health-based violation on file for KELSO 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.