A95/100
HIDDEN VALLEY LAKE CSD — Water Quality Report 2026
Serving 6,235 people · California
Water Source
Groundwater
County
—
System ID
CA1710015
Violations
1
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2004.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About HIDDEN VALLEY LAKE CSD
Is HIDDEN VALLEY LAKE CSD water safe to drink?
HIDDEN VALLEY LAKE CSD water receives a grade of A (95/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has HIDDEN VALLEY LAKE CSD detected?
31 contaminants were tested in HIDDEN VALLEY LAKE CSD's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does HIDDEN VALLEY LAKE CSD have any EPA violations?
Yes, HIDDEN VALLEY LAKE CSD has 1 EPA violation(s) on record, with the most recent in 2004. Violation types include MCL. 1 are health-based violations.
How many people does HIDDEN VALLEY LAKE CSD serve?
HIDDEN VALLEY LAKE CSD serves approximately 6,235 people, California.
What type of water does HIDDEN VALLEY LAKE CSD provide?
HIDDEN VALLEY LAKE CSD sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1710015.
How does HIDDEN VALLEY LAKE CSD compare to other utilities in California?
HIDDEN VALLEY LAKE CSD scores 95/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.