What's in CORONA, CITY OF's water?
CORONA, 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: 168,575, over 44,981 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, CORONA, CITY OF ranks 1,702th by violation burden (87th percentile) - 88 violations total, 11 health-baseds.
How CORONA, CITY OF compares within CA
CA's 803 covered systems average 5.8 health-based violations each; CORONA, CITY OF carries 11, more than typical for the state. 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 CORONA, CITY OF is from 2022-01-04 (health-based: 2001-01-06). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
CORONA, 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
- Microbial contamination / treatment technique - flagged from: Surface Water Treatment Rule
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
CORONA, 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 - 11 health-based violations on file for CORONA, 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.