Cal-Am Water Coronado, CA Water Quality
What's in Cal-Am Water Coronado's water?
Cal-Am Water Coronado 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 106,000 people through 21,749 service connections.
Cal-Am Water Coronado's record against the rest of the country
Cal-Am Water Coronado has 1 violation on record in total, 1 of them health-based - ranking it 9,176th of 12,903 systems by violation count, the 29th percentile nationally.
Against the CA average
Cal-Am Water Coronado's 1 health-based violations sit within the CA average of 5.8, across 804 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
Cal-Am Water Coronado's most recent violation on record is dated 2023-01-08, with the most recent health-based one dated 2023-01-08. Last reported to EPA: 06/22/2026.
The concern categories on record
Cal-Am Water Coronado'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: 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 Cal-Am Water Coronado's record does not cover
Everything on this page is Cal-Am Water Coronado's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and Cal-Am Water Coronado's customers' taps is household plumbing, invisible to a system-level record ranked 9,176th of 12,903 by violation count. The guide to what this data misses covers that gap.