Downey - City, Water Dept., CA Water Quality
Is Downey - City, Water Dept.'s water safe to drink?
Downey - City, Water Dept. has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 110,556, over 23,459 connections.
Ranked against every other system in this dataset
Downey - City, Water Dept. has 6 violations on record in total, 3 of them health-based - ranking it 5,466th of 12,903 systems by violation count, the 58th percentile nationally.
How Downey - City, Water Dept. compares within CA
Among the 804 CA systems in this dataset, the average is 5.8 health-based violations - Downey - City, Water Dept.'s 3 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for Downey - City, Water Dept. is from 2018-01-02 (health-based: 2018-01-02). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
Downey - City, Water Dept.'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); Revised Total Coliform 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
This is what Downey - City, Water Dept. 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 Downey - City, Water Dept.'s customers' taps is household plumbing, invisible to a system-level record ranked 5,466th of 12,903 by violation count. The guide to what this data misses covers that gap.