Drinking Water Systems in HOLLISTER, California
21 water systems are reported for this city, with a combined service population of 53,795. The systems have 13 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving HOLLISTER
SPRINGWOOD ESTATES MWC
50 served2 historical records
A
COMSTOCK MUTUAL WATER COMPANY
100 served3 historical records
A
ASHFORD HIGHLANDS MWC
132 served5 historical records
A
SAN JUSTO MUTUAL WATER COMPANY
160 served15 historical records2 recent
C
VENTURE ESTATES MWC
50 served27 historical records2 recent
B
SAN BENITO COUNTY WATER DISTRICT
25 served0 historical records
A
CREEKBRIDGE MUTUAL WATER COMPANY
69 served3 historical records
A
WHISPERING PINES INN
38 served9 historical records2 recent
B
HOLLISTER RANCH ESTATES
150 served4 historical records
A
VINEYARD ESTATES MWC
90 served5 historical records2 recent
B
CASA DE FRUTA ORCHARDS
53 served0 historical records
A
CASA DE FRUTA WATER SYSTEM
250 served3 historical records
A
MCMAHON ROAD MUTUAL WATER COMPANY
102 served12 historical records
A
UNION HEIGHTS MWC
98 served3 historical records
A
SUNNYSLOPE COUNTY WATER DIST
24,954 served2 historical records
A
RANCHO SAN JOAQUIN MWC
914 served11 historical records4 recent
D
VALENZUELA WATER SYSTEM
55 served25 historical records1 recent
B
DUNNEVILLE ESTATES CSA #50
120 served0 historical records
A
CSA NO. 31 STONEGATE WS
230 served8 historical records
A
ROSA MORADA MUTUAL WATER COMPANY
138 served8 historical records
A
HOLLISTER, CITY OF
26,017 served6 historical records
A
EPA Contaminant Categories in Historical Violation Records
Coliform (TCR)39 records
Total Trihalomethanes (TTHMs)29 records
Arsenic10 records
Gross Alpha9 records
Consumer Confidence Rule9 records
Haloacetic Acids (HAA5)7 records
Chlorine7 records
Nitrate7 records
Revised Total Coliform Rule6 records
LEAD AND COPPER RULE REVISIONS3 records
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.