Is PATTERSON, CITY OF's water safe to drink?
PATTERSON, CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 24,977, over 7,367 connections.
How this compares nationally
5 total violations and 3 health-based ones put PATTERSON, CITY OF at the 57th percentile nationally for violation burden, rank 5,525 of 12,903.
How PATTERSON, CITY OF compares within CA
Among the 803 CA systems in this dataset, the average is 5.8 health-based violations - PATTERSON, CITY OF's 3 is at or below that. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for PATTERSON, CITY OF is from 2007-01-01 (health-based: 2007-01-01). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
PATTERSON, 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)
- Nitrate / nitrite - flagged from: Nitrate
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
PATTERSON, CITY OF's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. This record - 3 health-based violations on file for PATTERSON, 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.