What's in HOLLISTER, CITY OF's water?
HOLLISTER, CITY OF 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 26,017 people through 7,884 service connections.
Ranked against every other system in this dataset
19 total violations and 6 health-based ones put HOLLISTER, CITY OF at the 76th percentile nationally for violation burden, rank 3,108 of 12,903.
How HOLLISTER, CITY OF compares within CA
HOLLISTER, CITY OF's 6 health-based violations sit above the CA average of 5.8, across 803 systems statewide. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for HOLLISTER, CITY OF is from 2024-01-04 (health-based: 2022-01-07). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
HOLLISTER, 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:
- Nitrate / nitrite - flagged from: Nitrate
- Disinfection byproducts - flagged from: TTHM
The most severe category on record is nitrate / nitrite, which points toward a reverse osmosis-class filter if you want to address it directly.
What this data is and is not
HOLLISTER, 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. Between the utility's meter and HOLLISTER, CITY OF's customers' taps is household plumbing, invisible to a system-level record ranked 3,108th of 12,903 by violation count. The guide to what this data misses covers that gap.