F0/100
MARIPOSA PUBLIC UTILITY DIST — Water Quality Report 2026
Serving 2,000 people · California
Water Source
Surface Water
County
—
System ID
CA2210001
Violations
51
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.50 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
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 MARIPOSA PUBLIC UTILITY DIST
Is MARIPOSA PUBLIC UTILITY DIST water safe to drink?
MARIPOSA PUBLIC UTILITY DIST water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 51 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MARIPOSA PUBLIC UTILITY DIST detected?
2 contaminants were tested in MARIPOSA PUBLIC UTILITY DIST's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does MARIPOSA PUBLIC UTILITY DIST have any EPA violations?
Yes, MARIPOSA PUBLIC UTILITY DIST has 51 EPA violation(s) on record, with the most recent in 2013. Violation types include MCL, TT, MR. 47 are health-based violations.
How many people does MARIPOSA PUBLIC UTILITY DIST serve?
MARIPOSA PUBLIC UTILITY DIST serves approximately 2,000 people, California.
What type of water does MARIPOSA PUBLIC UTILITY DIST provide?
MARIPOSA PUBLIC UTILITY DIST 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 CA2210001.
How does MARIPOSA PUBLIC UTILITY DIST compare to other utilities in California?
MARIPOSA PUBLIC UTILITY DIST scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our California state page for a full comparison of water systems.