Tapcensus

Water quality in Santa Clara, California

Santa Clara is in Santa Clara County. 119 active public water systems serve the county; 41 had an EPA violation in the past three years.

Most likely your provider

City of Santa Clara CA4310012 · Community water system · Surface water purchased · Santa Clara
Serves 134,587 people Rules violated, past 3 years 0 Last sanitary survey Sep 23, 2025 Distance under 0.1 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in Santa Clara County

72 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Lee's Orchard Owners Association
Santa Clara		 35 0 under 0.1 mi
City of Sunnyvale
Sunnyvale		 157,566 5 3.2 mi
City of San Jose Nsj/alviso
San Jose		 48,082 0 4.9 mi
San Jose Water
 1,039,920 0 5.6 mi
Cwsc los Altos Suburban
 63,559 0 5.6 mi
Nasa Ames Research Center
 1,200 0 5.9 mi
City of Milpitas
Milpitas		 81,915 1 6.0 mi
City of Cupertino
Cupertino		 16,336 0 6.3 mi
City of Mountain View
Mountain View		 81,340 0 6.8 mi
Mt. Eden Mutual Water Company
 165 1 7.9 mi
Spring Valley Heights Association INC
 65 0 8.5 mi
Roseview Heights Mutual Water Company
 148 1 9.4 mi
Saratoga Heights Mutual Water Company
 258 0 9.6 mi
Purissima Hills Water District
 6,252 1 9.8 mi
Camp Saratoga
 450 0 10.0 mi
City of Palo Alto
Palo Alto		 67,658 0 10.0 mi
Kennon Water Company
 142 1 10.2 mi
Mireval Improvement Association
 60 1 10.4 mi
Mt. Pleasant Water Users Association
 300 0 10.8 mi
Three Springs Ranch Mutual Water Company
 110 0 11.2 mi
Vista Grande Water Users Association
 79 0 11.5 mi
Stanford University
 23,817 0 11.7 mi
Lake Canyon Mutual Water Company
 156 1 11.8 mi
Aborn Heights Water Mutual Association
 45 1 12.1 mi
City of San Jose Evg/edv/coy
San Jose		 99,783 0 13.0 mi
All 73 community water systems in Santa Clara County
Non-community systems in Santa Clara County (46: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
O'connor Hospital
 2,500 2 1
Santa Clara Valley Medical Center
 3,000 3 2
EL Camino Hospital
 2,000 0 0
Newby Island Landfill, Republic Services
 65 0 0
Saratoga Springs, Inc.
 180 0 0
Walden West
 273 0 0
Sanborn-Skyline County Park
 414 0 0
Mt. Hamilton Grandview Restaurant
 181 0 0
Lakeside Sd-Lakeside School
 127 1 0
Western Digital Technologies, Inc.
 2,439 0 0
Joseph Grant County Park
 322 1 0
Nestldown Ranch
 265 0 0
Metcalf Motorcycle County Park
 210 0 0
Alma Latter-Day Saints Church
 25 2 1
Field Sports Park/coyote Ranch
 258 0 0
Loma Prieta Jusd-Loma Prieta School
 542 0 0
Calero County Park
 210 0 0
Cinnabar Hills Golf Club
 50 1 1
Coyote Creek Golf Club
 101 0 0
Monterey Mushrooms
 361 1 1
Hkn LLC
 50 1 1
Coyote Valley Sporting Clays
 27 1 1
Willow Heights Mansion
 269 0 0
Sveadal Water System
 111 0 0
Uvas Canyon County Park
 512 0 0
Morgan Hill Usd-Machado School
 60 0 0
Economy Inn
 52 1 0
Csp Henry W. Coe State Park
 1,205 0 0
George Chiala Farms INC
 150 0 0
The Rainbow Junction Water System
 50 2 0
Scc Animal Shelter/airport
 25 0 0
San Martin Lions Club
 30 0 0
Chitactac-Adams County Park
 156 0 0
Mt. Madonna County Park
 621 0 0
Coyote Lake County Park
 216 1 0
VO UU Buddhist Meditation Association
 33 0 0
Learning Services Corp.
 48 0 0
Fortino Winery
 25 0 0
Gilroy Usd-Rucker School
 510 0 0
Reforestation Technologies International
 34 1 1
Gavilan Joint Community College District
 5,400 0 0
Pacific Point Christian School
 165 0 0
Garlic World
 25 1 0
Christopher Ranch L.l.c.
 735 0 0
Henry W Coe State Park Dowdy Ranch
 65 0 0
Z Best Products
 90 0 0
About this data

Water systems are matched to Santa Clara County, nearest to Santa Clara first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.

Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.

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. Retrieved from ECHO on Oct 11, 2026.