Water Quality: Napa, CA
15 water systems • 87,861 people served
Multiple Health Violations177
Total Violations
71
Health-Based Violations
15
Water Systems
87,861
Population Served
Water Quality Summary
Napa has 71 health-based violations on record, meaning one or more contaminants were found above EPA-established safe levels. Contaminants involved: Arsenic, E. coli, Gross Alpha, Stage 2 DBP, TTHM, Total Haloacetic Acids (HAA5). In total, 177 violations are on record for 15 water systems serving 87,861 people.
Contaminants Found
Arsenic
E. coli
Gross Alpha
Stage 2 DBP
TTHM
Total Haloacetic Acids (HAA5)
Water Systems Serving Napa
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| NAPA, CITY OF | CA2810003 | Surface Water | 84,804 | 3 |
| BERRYESSA HIGHLANDS | CA2810013 | Surface Water | 715 | 50 |
| CIRCLE OAKS WATER DISTRICT | CA2800521 | Surface Water | 500 | 2 |
| BERRYESSA ESTATES (LBRID) | CA2800526 | Surface Water | 474 | 13 |
| BERRYESSA PINES WATER SYSTEM | CA2810009 | Surface Water | 261 | 16 |
| MEYERS WATER CO. | CA2800530 | Groundwater | 250 | 6 |
| HESS WINERY | CA2801016 | Groundwater | 250 | 4 |
| SPANISH FLAT WATER DISTRICT | CA2810014 | Surface Water | 230 | 13 |
| NAPA RIVER RANCH | CA2800531 | Groundwater | 70 | 35 |
| RIVER RANCH FARM WORKER CENTER | CA2800035 | Groundwater | 66 | 0 |
| MONDAVI FARM WORKER CENTER | CA2800040 | Groundwater | 66 | 0 |
| CALISTOGA FARM WORKER CENTER | CA2800039 | Groundwater | 65 | 0 |
| MILTON ROAD WATER COMPANY | CA2801080 | Groundwater | 44 | 21 |
| LITTLE LAKE MOBILE HOME PARK | CA2300705 | Groundwater | 38 | 4 |
| R RANCH AT THE LAKE | CA2800593 | Groundwater | 28 | 10 |
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.