Water Quality: Mariposa, CA
6 water systems • 3,755 people served
Multiple Health Violations53
Total Violations
40
Health-Based Violations
6
Water Systems
3,755
Population Served
Water Quality Summary
Mariposa has 40 health-based violations on record, meaning one or more contaminants were found above EPA-established safe levels. Contaminants involved: Gross Alpha, Stage 2 DBP, TTHM, Total Haloacetic Acids (HAA5). In total, 53 violations are on record for 6 water systems serving 3,755 people.
Contaminants Found
Gross Alpha
Stage 2 DBP
TTHM
Total Haloacetic Acids (HAA5)
Water Systems Serving Mariposa
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| MARIPOSA PUBLIC UTILITY DIST | CA2210001 | Surface Water | 2,000 | 38 |
| PONDEROSA BASIN MUTUAL WTR CO | CA2210002 | Groundwater | 798 | 1 |
| YOSEMITE WEST WATER SYSTEM | CA2210924 | Groundwater | 420 | 1 |
| MARIPOSA PINES MUTUAL | CA2210906 | Groundwater | 284 | 9 |
| MPWD-COULTERVILLE CSA 1 | CA2210901 | Groundwater | 193 | 4 |
| CDF & FP - MT. BULLION | CA2210851 | Groundwater | 60 | 0 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.