What's in Viejas Community System's water?
Viejas Community System has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 9,600 people through 230 service connections.
Viejas Community System's record against the rest of the country
146 total violations and 3 health-based ones put Viejas Community System at the 64th percentile nationally for violation burden, rank 4,673 of 12,903.
How Viejas Community System compares within CA
Viejas Community System's 3 health-based violations sit within the CA average of 5.8, across 803 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 Viejas Community System is from 2026-01-02 (health-based: 2008-01-12). Last reported to EPA: 06/30/2026.
What kind of problem, specifically
Viejas Community 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)
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 Viejas Community 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. This record - 3 health-based violations on file for Viejas Community System - 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.