Tapcensus

Water quality in Los Altos, California

Los Altos 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 Mountain View CA4310007 · Community water system · Surface water purchased · Mountain View
Serves 81,340 people Rules violated, past 3 years 0 Last sanitary survey Feb 11, 2025 Distance 2.7 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
Cwsc los Altos Suburban
 63,559 0 1.6 mi
Purissima Hills Water District
 6,252 1 2.8 mi
City of Palo Alto
Palo Alto		 67,658 0 3.2 mi
City of Cupertino
Cupertino		 16,336 0 3.8 mi
City of Sunnyvale
Sunnyvale		 157,566 5 4.1 mi
Nasa Ames Research Center
 1,200 0 4.2 mi
Stanford University
 23,817 0 5.5 mi
Mt. Eden Mutual Water Company
 165 1 6.7 mi
City of Santa Clara
Santa Clara		 134,587 0 7.1 mi
Lee's Orchard Owners Association
Santa Clara		 35 0 7.1 mi
Camp Saratoga
 450 0 7.6 mi
City of San Jose Nsj/alviso
San Jose		 48,082 0 8.2 mi
Saratoga Heights Mutual Water Company
 258 0 9.4 mi
San Jose Water
 1,039,920 0 11.4 mi
City of Milpitas
Milpitas		 81,915 1 11.7 mi
Lake Canyon Mutual Water Company
 156 1 12.7 mi
Vista Grande Water Users Association
 79 0 12.9 mi
Mireval Improvement Association
 60 1 13.2 mi
Kennon Water Company
 142 1 13.6 mi
Spring Valley Heights Association INC
 65 0 14.7 mi
Oakmont Water System
 61 0 14.7 mi
Raineri Mutual Water Company
 145 1 14.9 mi
Brush and Old Well Mutual Water Company
 70 1 15.0 mi
Lupin Lodge
 300 2 15.1 mi
Chemeketa Park Mutual Water Company
 346 1 15.6 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
EL Camino Hospital
 2,000 0 0
Saratoga Springs, Inc.
 180 0 0
Walden West
 273 0 0
O'connor Hospital
 2,500 2 1
Santa Clara Valley Medical Center
 3,000 3 2
Sanborn-Skyline County Park
 414 0 0
Newby Island Landfill, Republic Services
 65 0 0
Lakeside Sd-Lakeside School
 127 1 0
Nestldown Ranch
 265 0 0
Alma Latter-Day Saints Church
 25 2 1
Mt. Hamilton Grandview Restaurant
 181 0 0
Western Digital Technologies, Inc.
 2,439 0 0
Loma Prieta Jusd-Loma Prieta School
 542 0 0
Joseph Grant County Park
 322 1 0
Metcalf Motorcycle County Park
 210 0 0
Calero County Park
 210 0 0
Field Sports Park/coyote Ranch
 258 0 0
Cinnabar Hills Golf Club
 50 1 1
Coyote Creek Golf Club
 101 0 0
Monterey Mushrooms
 361 1 1
Uvas Canyon County Park
 512 0 0
Hkn LLC
 50 1 1
Sveadal Water System
 111 0 0
Coyote Valley Sporting Clays
 27 1 1
Willow Heights Mansion
 269 0 0
Morgan Hill Usd-Machado School
 60 0 0
Economy Inn
 52 1 0
George Chiala Farms INC
 150 0 0
Csp Henry W. Coe State Park
 1,205 0 0
Mt. Madonna County Park
 621 0 0
The Rainbow Junction Water System
 50 2 0
Chitactac-Adams County Park
 156 0 0
San Martin Lions Club
 30 0 0
Scc Animal Shelter/airport
 25 0 0
Fortino Winery
 25 0 0
Learning Services Corp.
 48 0 0
VO UU Buddhist Meditation Association
 33 0 0
Coyote Lake County Park
 216 1 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
Z Best Products
 90 0 0
Henry W Coe State Park Dowdy Ranch
 65 0 0
About this data

Water systems are matched to Santa Clara County, nearest to Los Altos 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.