D39/100
UNION PUBLIC UTILITY DISTRICT — Water Quality Report 2026
Serving 4,774 people · California
Water Source
Surface Water
County
—
System ID
CA0510001
Violations
17
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2021.
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 UNION PUBLIC UTILITY DISTRICT
Is UNION PUBLIC UTILITY DISTRICT water safe to drink?
UNION PUBLIC UTILITY DISTRICT water receives a grade of D (39/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 17 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has UNION PUBLIC UTILITY DISTRICT detected?
51 contaminants were tested in UNION PUBLIC UTILITY DISTRICT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does UNION PUBLIC UTILITY DISTRICT have any EPA violations?
Yes, UNION PUBLIC UTILITY DISTRICT has 17 EPA violation(s) on record, with the most recent in 2021. Violation types include MCL, Other, MR. 11 are health-based violations.
How many people does UNION PUBLIC UTILITY DISTRICT serve?
UNION PUBLIC UTILITY DISTRICT serves approximately 4,774 people, California.
What type of water does UNION PUBLIC UTILITY DISTRICT provide?
UNION PUBLIC UTILITY DISTRICT sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA0510001.
How does UNION PUBLIC UTILITY DISTRICT compare to other utilities in California?
UNION PUBLIC UTILITY DISTRICT scores 39/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our California state page for a full comparison of water systems.