A83/100
WILLOW CREEK C.S.D. — Water Quality Report 2026
Serving 1,298 people · California
Water Source
Groundwater Under Influence of Surface Water
County
—
System ID
CA1210015
Violations
5
Contaminant Test Results
EPA Violation History
3
Violations (last 5yr)
3
Unresolved
1
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Unresolved
Treatment technique violation
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 WILLOW CREEK C.S.D.
Is WILLOW CREEK C.S.D. water safe to drink?
WILLOW CREEK C.S.D. water receives a grade of A (83/100), which is considered excellent. Out of 8 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has WILLOW CREEK C.S.D. detected?
8 contaminants were tested in WILLOW CREEK C.S.D.'s water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does WILLOW CREEK C.S.D. have any EPA violations?
Yes, WILLOW CREEK C.S.D. has 5 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, TT. 3 are health-based violations.
How many people does WILLOW CREEK C.S.D. serve?
WILLOW CREEK C.S.D. serves approximately 1,298 people, California.
What type of water does WILLOW CREEK C.S.D. provide?
WILLOW CREEK C.S.D. sources its water from groundwater under influence of surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA1210015.
How does WILLOW CREEK C.S.D. compare to other utilities in California?
WILLOW CREEK C.S.D. scores 83/100 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.