What's in HIDDEN VALLEY LAKE CSD's water?
HIDDEN VALLEY LAKE CSD has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 6,235 people get their water from it, across 2,518 connections.
HIDDEN VALLEY LAKE CSD's record against the rest of the country
HIDDEN VALLEY LAKE CSD has 1 violation on record in total, 1 of them health-based - ranking it 9,206th of 12,903 systems by violation count, the 29th percentile nationally.
Against the CA average
CA's 803 covered systems average 5.8 health-based violations each; HIDDEN VALLEY LAKE CSD carries 1, not more than typical for the state. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
HIDDEN VALLEY LAKE CSD's most recent violation on record is dated 2004-01-10, with the most recent health-based one dated 2004-01-10. Last reported to EPA: 06/22/2026.
The concern categories on record
HIDDEN VALLEY LAKE CSD'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)
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 HIDDEN VALLEY LAKE CSD's record does not cover
Everything on this page is HIDDEN VALLEY LAKE CSD's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 1 health-based violation on file for HIDDEN VALLEY LAKE CSD - 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.