What's in CASTLE ROCK MUNICIPAL WATER's water?
CASTLE ROCK MUNICIPAL WATER has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 4,367 people get their water from it, across 1,202 connections.
CASTLE ROCK MUNICIPAL WATER's record against the rest of the country
Out of 12,903 systems in this dataset, CASTLE ROCK MUNICIPAL WATER ranks 5,937th by violation burden (54th percentile) - 47 violations total, 2 health-baseds.
Against the WA average
CASTLE ROCK MUNICIPAL WATER's 2 health-based violations sit within the WA average of 3.7, across 322 systems statewide. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
CASTLE ROCK MUNICIPAL WATER's most recent violation on record is dated 2026-01-03, with the most recent health-based one dated 2006-01-04. Last reported to EPA: 06/19/2026.
The concern categories on record
CASTLE ROCK MUNICIPAL WATER'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: 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 CASTLE ROCK MUNICIPAL WATER's record does not cover
This is what CASTLE ROCK MUNICIPAL WATER 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. This record - 2 health-based violations on file for CASTLE ROCK MUNICIPAL WATER - 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.