SAN JOSE WATER: EPA violation history, explained
SAN JOSE WATER had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 1,039,920 people through 237,130 service connections.
SAN JOSE WATER's record against the rest of the country
Out of 12,903 systems in this dataset, SAN JOSE WATER ranks 5,514th by violation burden (57th percentile) - 5 violations total, 3 health-baseds.
How SAN JOSE WATER compares within CA
Among the 803 CA systems in this dataset, the average is 5.8 health-based violations - SAN JOSE WATER'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 SAN JOSE WATER is from 2023-01-06 (health-based: 2023-01-06). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
SAN JOSE WATER'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); 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
SAN JOSE WATER'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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 5 logged violations can see. The guide to what this data misses covers that gap.