EAST COLUMBIA WATER SYSTEM: EPA violation history, explained
EAST COLUMBIA WATER SYSTEM has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 2,829 people get their water from it, across 943 connections.
How this compares nationally
57 total violations and 31 health-based ones put EAST COLUMBIA WATER SYSTEM at the 96th percentile nationally for violation burden, rank 546 of 12,903.
Against the LA average
LA's 347 covered systems average 12.6 health-based violations each; EAST COLUMBIA WATER SYSTEM carries 31, more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
EAST COLUMBIA WATER SYSTEM's most recent violation on record is dated 2021-01-10, with the most recent health-based one dated 2021-01-10. Last reported to EPA: 06/23/2026.
The concern categories on record
EAST COLUMBIA WATER SYSTEM'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); Groundwater Rule
- Disinfection byproducts - flagged from: TTHM; Total Haloacetic Acids (HAA5)
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 EAST COLUMBIA WATER SYSTEM's record does not cover
This is what EAST COLUMBIA WATER SYSTEM 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 EAST COLUMBIA WATER SYSTEM's customers' taps is household plumbing, invisible to a system-level record ranked 546th of 12,903 by violation count. The guide to what this data misses covers that gap.