Tapcensus

Water quality in Alum Rock, California

Alum Rock 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

San Jose Water CA4310011 · Community water system · Surface water
Serves 1,039,920 people Rules violated, past 3 years 0 Last sanitary survey May 8, 2026 Distance 6.8 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
Roseview Heights Mutual Water Company
 148 1 1.6 mi
Three Springs Ranch Mutual Water Company
 110 0 3.3 mi
Mt. Pleasant Water Users Association
 300 0 3.4 mi
Spring Valley Heights Association INC
 65 0 4.9 mi
Aborn Heights Water Mutual Association
 45 1 5.1 mi
City of Milpitas
Milpitas		 81,915 1 6.0 mi
City of San Jose Evg/edv/coy
San Jose		 99,783 0 7.7 mi
Lee's Orchard Owners Association
Santa Clara		 35 0 7.9 mi
City of Santa Clara
Santa Clara		 134,587 0 7.9 mi
City of San Jose Nsj/alviso
San Jose		 48,082 0 9.4 mi
Lick Observatory-Ucsc
 369 0 10.2 mi
Great Oaks WC INC
 112,582 0 10.2 mi
Muriel Wright Residential Center
 52 0 10.8 mi
City of Sunnyvale
Sunnyvale		 157,566 5 11.0 mi
Santa Clara Valley Water District
 0 0 11.8 mi
Kennon Water Company
 142 1 12.1 mi
Mireval Improvement Association
 60 1 12.9 mi
Nasa Ames Research Center
 1,200 0 13.0 mi
Cwsc los Altos Suburban
 63,559 0 13.6 mi
Coyote Valley RV Resort
 500 0 13.7 mi
City of Cupertino
Cupertino		 16,336 0 13.8 mi
Sullivan Mutual Water
 53 2 14.0 mi
City of Mountain View
Mountain View		 81,340 0 14.3 mi
Santa Teresa Meadows Water Company
 68 0 14.3 mi
Mt. Eden Mutual Water Company
 165 1 14.5 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
Mt. Hamilton Grandview Restaurant
 181 0 0
Joseph Grant County Park
 322 1 0
O'connor Hospital
 2,500 2 1
Santa Clara Valley Medical Center
 3,000 3 2
Newby Island Landfill, Republic Services
 65 0 0
Western Digital Technologies, Inc.
 2,439 0 0
Metcalf Motorcycle County Park
 210 0 0
Field Sports Park/coyote Ranch
 258 0 0
Coyote Creek Golf Club
 101 0 0
EL Camino Hospital
 2,000 0 0
Calero County Park
 210 0 0
Cinnabar Hills Golf Club
 50 1 1
Hkn LLC
 50 1 1
Monterey Mushrooms
 361 1 1
Saratoga Springs, Inc.
 180 0 0
Lakeside Sd-Lakeside School
 127 1 0
Walden West
 273 0 0
Coyote Valley Sporting Clays
 27 1 1
Sanborn-Skyline County Park
 414 0 0
Willow Heights Mansion
 269 0 0
Nestldown Ranch
 265 0 0
Alma Latter-Day Saints Church
 25 2 1
Loma Prieta Jusd-Loma Prieta School
 542 0 0
The Rainbow Junction Water System
 50 2 0
Csp Henry W. Coe State Park
 1,205 0 0
Sveadal Water System
 111 0 0
Uvas Canyon County Park
 512 0 0
Morgan Hill Usd-Machado School
 60 0 0
George Chiala Farms INC
 150 0 0
Economy Inn
 52 1 0
Scc Animal Shelter/airport
 25 0 0
San Martin Lions Club
 30 0 0
Coyote Lake County Park
 216 1 0
VO UU Buddhist Meditation Association
 33 0 0
Learning Services Corp.
 48 0 0
Chitactac-Adams County Park
 156 0 0
Gilroy Usd-Rucker School
 510 0 0
Mt. Madonna County Park
 621 0 0
Fortino Winery
 25 0 0
Pacific Point Christian School
 165 0 0
Reforestation Technologies International
 34 1 1
Henry W Coe State Park Dowdy Ranch
 65 0 0
Gavilan Joint Community College District
 5,400 0 0
Garlic World
 25 1 0
Christopher Ranch L.l.c.
 735 0 0
Z Best Products
 90 0 0
About this data

Water systems are matched to Santa Clara County, nearest to Alum Rock 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.