Drinking Water Systems in NAPA, California
16 water systems are reported for this city, with a combined service population of 87,913. The systems have 21 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving NAPA
BERRYESSA PINES WATER SYSTEM
261 served5 historical records2 recent
B
MEYERS WATER CO.
250 served13 historical records
A
NAPA RIVER RANCH
70 served29 historical records11 recent
D
SPANISH FLAT WATER DISTRICT
230 served0 historical records
A
CIRCLE OAKS WATER DISTRICT
500 served3 historical records
A
NAPA, CITY OF
84,804 served2 historical records
A
RIVER RANCH FARM WORKER CENTER
66 served0 historical records
A
CALISTOGA FARM WORKER CENTER
65 served1 historical record
A
MONDAVI FARM WORKER CENTER
66 served1 historical record
A
EDDY DRIVE
48 served0 historical records
A
BERRYESSA ESTATES (LBRID)
474 served27 historical records
A
BERRYESSA HIGHLANDS
715 served4 historical records
A
MILTON ROAD WATER COMPANY
44 served13 historical records
A
R RANCH AT THE LAKE
28 served15 historical records5 recent
C
HESS WINERY
250 served6 historical records2 recent
C
BUCKTAIL MUTUAL WATER COMPANY
42 served3 historical records1 recent
B
EPA Contaminant Categories in Historical Violation Records
Coliform (TCR)34 records
Lead and Copper Rule14 records
Gross Alpha10 records
Revised Total Coliform Rule8 records
Nitrate7 records
Consumer Confidence Rule5 records
LEAD AND COPPER RULE REVISIONS5 records
Total Trihalomethanes (TTHMs)4 records
Surface Water Treatment Rule1 record
Haloacetic Acids (HAA5)1 record
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.