Tapcensus

Water quality for ZIP code 91750

ZIP 91750 covers La Verne, Claremont, San Dimas, and Glendora in Los Angeles County, California, one of 295 ZIP codes in the county. 271 active public water systems serve the county; 66 had an EPA violation in the past three years.

Most likely your provider

LA Verne, City WD CA1910062 · Community water system · Surface water purchased · La Verne
Serves 31,334 people Rules violated, past 3 years 0 Last sanitary survey Oct 20, 2021 Distance 3.6 mi
View system details EPA facility report

Other community water systems in Los Angeles County

198 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Camp Williams-Resort Water
 80 0 3.8 mi
The River Community
 35 2 4.0 mi
Metropolitan Water Dist. of So. Cal.
 0 0 4.0 mi
Glendora-City, Water Dept.
Glendora		 44,411 0 5.3 mi
Gswc Claremont
 39,776 0 5.5 mi
Gswc-San Dimas
 56,564 0 6.3 mi
Suburban Water Systems-Glendora
 5,301 0 7.1 mi
Covina Valley Water Company Wholesale
 0 0 7.6 mi
Suburban Water Systems-Covina Knolls
 1,451 0 8.2 mi
Pomona City, Water Dept.
Pomona		 151,713 0 8.4 mi
Three Valleys Mwd
 0 0 8.6 mi
Calif State Polytechnical Univ Pomona
 2,668 2 8.8 mi
Covina-City, Water Dept.
Covina		 33,300 0 8.8 mi
Azusa Light and Water
 110,044 0 9.0 mi
Valencia Heights Water Co.
 7,775 0 9.8 mi
Cal-Am Water Company Duarte
 24,767 0 11.2 mi
Valley County Water Dist.
 68,871 0 11.9 mi
Walnut Valley Water District
 100,941 0 12.3 mi
Monrovia-City, Water Dept.
Monrovia		 37,931 0 12.4 mi
Suburban Water Systems-San Jose
 170,523 0 12.9 mi
Valley View Mutual Water Co.
 4,613 0 13.2 mi
Hemlock Mutual Water Co.
 686 2 14.4 mi
Fenner Canyon Youth Conservation Camp
 95 1 14.6 mi
LA Puente Valley Cwd
 8,276 0 14.8 mi
Gswc-South Arcadia
 27,430 0 15.0 mi
All 199 community water systems in Los Angeles County
Non-community systems in Los Angeles County (72: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Coldbrook Campground
 38 0 0
Irwindale Brewery Yard (iby)
 300 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
Martin Marietta Southern Calif Aggregate
 51 0 0
Mount Kare Camp/kare Youth League
 59 0 0
Usfs-Big Pines V-2
 54 0 0
Mountain High East Ski Area
 150 0 0
Usfs-Jackson Lake V-4
 805 0 0
Usfs-Appletree Flats V-3
 25 0 0
Huttopia Paradise Springs
 302 1 0
Usfs-Chantry Flats-A16 Water
 113 0 0
Camp Elk
 121 0 0
Usfs-Chilao Main A-9
 50 0 0
Usfs-Skyline Park / Mount Wilson A-4
 25 0 0
Angeles Crest Christian Camp
 112 1 0
Henninger Flats
 50 0 0
Usfs-Valyermo Ranger Station
 25 1 1
Usfs-Red Box Station A-3
 25 0 0
Saint Andrews Abbey
 210 1 1
Colby Ranch-United Methodist Camp
 180 0 0
Millard Canyon Improvement Association
 42 1 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Clear Creek Outdoor Education Center
 105 0 0
Young-Nak Presbyterian Church
 25 0 0
General Atomics Aeronautical Gray Butt
 405 0 0
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Rancho los Amigos Hospital
 3,200 0 0
Rancho Ybarra Christian Camp
 73 0 0
1000 Trails / Soledad Canyon Preserve
 812 1 0
Acton-Agua Dulce Lds Church
 150 0 0
Acton Four Square Church
 50 0 0
Antelope Valley Indian Museum State Park
 506 0 0
Desert Aire Golf Course
 80 0 0
Acton la North KOA
 400 0 0
Acton Conservation Camp #11
 90 4 0
Los Angeles World Airports
 180 0 0
Angeles Shooting Ranges
 490 0 0
Lockheed Martin Skunk Works
 135 0 0
Northrop Grumman Corp.
 5,764 1 0
Lancaster National Soccer Center
Lancaster 		500 0 0
Vasquez Rocks County Park
 30 0 0
Agua Dulce Women's Club
 50 0 0
Lang Ranch Shopping Center
 28 0 0
Wagon Wheel Plaza
 55 1 0
Ilead Agua Dulce Charter School
 450 1 1
Agua Dulce Water System
 493 0 0
Agua Dulce Winery
 113 0 0
Living Springs Church
 50 0 0
Shepherd of the Hills
 80 0 0
Eastside Union School District
 650 1 1
All non-community systems
About this data

Water systems are matched to Los Angeles County, the county this ZIP code lies in, nearest to the ZIP code's centre 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.

ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.