Tapcensus

California

San Benito County drinking water quality

64 active public water systems serve 105,886 people in San Benito County. 40 are compliant, 24 had at least one EPA violation in the past three years, 0 are designated serious violators, and 9 carry a health flag.

Active systems 64 31 community systems
People served 106K by public water systems
Systems with violations 24 38% of active systems, past 3 years
Serious violators 0 9 systems carry a health flag

Needs attention

San Juan Bautista, City of CA3510002 · San Juan Bautista · Community water system · Serves 2,335 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
San Justo Mutual Water Company CA3500550 · Community water system · Serves 166 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Mission Farm R.v. Park CA3500556 · Community water system · Serves 110 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Betabel RV Resort CA3500836 · Community water system · Serves 102 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Villa Robles Water System CA3500929 · Transient non-community system · Serves 98 3 rules violated in the past three years. Unresolved: Revised Total Coliform Rule and Ground Water Rule.
Rancho San Joaquin Mwc CA3500581 · Community water system · Serves 96 3 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Paicines Ranch CA3500925 · Non-Transient non-community system · Serves 52 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
McAlpine Lake & Park CA3500562 · Non-Transient non-community system · Serves 31 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Willow Grove Union Elementary School CA3500801 · Non-Transient non-community system · Serves 25 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.

Community water systems

31 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Hollister, City of
Hollister 		26,598 1 0
Sunnyslope County Water Dist
 25,486 0 0
Aromas Water District
 2,988 0 0
San Juan Bautista, City of
San Juan Bautista 		2,335 1 1
Mission Oaks Mobile Home Park
 550 0 0
Tres Pinos Cwd
 350 0 0
Golden State Water CO San Juan Oaks
 260 0 0
Csa No. 31 Stonegate WS
 230 1 0
San Justo Mutual Water Company
 166 2 1
Hollister Ranch Estates
 150 0 0
Ashford Highlands Mwc
 132 0 0
Mission Farm R.v. Park
 110 1 1
Betabel RV Resort
 102 2 1
McMahon Road Mutual Water Company
 102 0 0
Comstock Mutual Water Company
 100 0 0
Union Heights Mwc
 98 0 0
Rancho San Joaquin Mwc
 96 3 1
Dunneville Estates Csa #50
 95 0 0
Vineyard Estates Mwc
 90 2 1
Fallon Road Labor Housing
 84 0 0
Creekbridge Mutual Water Company
 69 1 1
Rosa Morada Mutual Water Company
 69 0 0
Valenzuela Water System
 55 1 0
Casa de Fruta Orchards
 53 0 0
Springwood Estates Mwc
 50 0 0
Venture Estates Mwc
 50 1 0
Los Madrones Mwc
 39 0 0
Aromas Hills Mutual Water Association
 33 1 0
Whispering Pines Inn
 28 1 0
Thousand Trails San Benito Preserve
 17 1 0
San Benito County Water District
 0 0 0
Non-community systems (33: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Csp-Fremont Peak
 22,217 0 0
33rd District Agricultural Association
 9,000 0 0
San Benito High School
 3,310 0 0
Csp Hollister Hills Svra
 2,719 0 0
Pinnacles National Park-East District
 1,811 1 1
Taylor Farms Retail, Inc.
 1,055 0 0
Pinnacles National Park Campground
 647 0 0
Pacific Scientific Energetic Mats. Comp.
 550 0 0
Kingdom Hall (fallon Rd)
 500 0 0
Mohi at the Grove
 500 0 0
True Leaf Farms, Llc.
 372 1 0
George Chiala Farms, Inc..
Hollister 		350 0 0
Pinnacles National Park-West District
 328 0 0
Dunneville Market & Kitchen
 300 0 0
Southside Elementary School
 300 0 0
Anzar High School
 268 0 0
T & a Onions
 165 0 0
Hollister Sda Christian School
 122 0 0
Fireclay Tile
 100 1 0
Villa Robles Water System
 98 3 2
Willis Construction WS
 76 0 0
Enza Zaden Research
 65 2 0
St. Francis Retreat Center
 61 1 0
Paicines Ranch
 52 2 1
Cienega Winery
 50 0 0
Paicines Water System
 50 0 0
Quintero Labor Camp #1 (wright Rd)
 50 0 0
Bayer Research and Development LLC
 35 0 0
Tri-Cal Incorporated
 35 0 0
B & R Farms
 34 0 0
McAlpine Lake & Park
 31 1 1
San Benito County Historical Park
 25 1 0
Willow Grove Union Elementary School
 25 2 1
Inactive systems (85, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The California records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.