Signal Hill - City, Water Dept., CA Water Quality
Is Signal Hill - City, Water Dept.'s water safe to drink?
Signal Hill - City, Water Dept. had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. Population served: 11,848, over 3,035 connections.
Ranked against every other system in this dataset
Signal Hill - City, Water Dept. has 13 violations on record in total, 6 of them health-based - ranking it 3,198th of 12,903 systems by violation count, the 75th percentile nationally.
How Signal Hill - City, Water Dept. compares within CA
CA's 804 covered systems average 5.8 health-based violations each; Signal Hill - City, Water Dept. carries 6, 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 Signal Hill - City, Water Dept. is from 2025-01-04 (health-based: 2025-01-04). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
Signal Hill - 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); 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
This is what Signal Hill - 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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 13 logged violations can see. The guide to what this data misses covers that gap.