What's in CWS - SELMA's water?
CWS - SELMA has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 26,517 people through 6,501 service connections.
Ranked against every other system in this dataset
CWS - SELMA has 1 violation on record in total, 1 of them health-based - ranking it 9,189th of 12,903 systems by violation count, the 29th percentile nationally.
How CWS - SELMA compares within CA
CA's 803 covered systems average 5.8 health-based violations each; CWS - SELMA carries 1, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for CWS - SELMA is from 1992-01-09 (health-based: 1992-01-09). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
CWS - SELMA'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 CWS - SELMA 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 CWS - SELMA's customers' taps is household plumbing, invisible to a system-level record ranked 9,189th of 12,903 by violation count. The guide to what this data misses covers that gap.