Tapcensus

Water quality in Irwindale, California

Irwindale is in Los Angeles County. 271 active public water systems serve the county; 66 had an EPA violation in the past three years.

Most likely your provider

Cal-Am Water Company Duarte CA1910186 · Community water system · Ground water
Serves 24,767 people Rules violated, past 3 years 0 Last sanitary survey Feb 20, 2025 Distance 1.6 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 Los Angeles County

198 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Valley County Water Dist.
 68,871 0 1.0 mi
Valley View Mutual Water Co.
 4,613 0 1.8 mi
Hemlock Mutual Water Co.
 686 2 2.7 mi
Azusa Light and Water
 110,044 0 2.9 mi
Gswc-South Arcadia
 27,430 0 3.3 mi
Sterling Mutual Water Company
 198 2 3.6 mi
Monrovia-City, Water Dept.
Monrovia		 37,931 0 4.1 mi
City of Arcadia
Arcadia		 54,236 0 4.5 mi
Suburban Water Systems-Glendora
 5,301 0 5.0 mi
EL Monte-City, Water Dept.
El Monte		 23,000 0 5.1 mi
Covina-City, Water Dept.
Covina		 33,300 0 5.2 mi
Suburban Water Systems-San Jose
 170,523 0 5.5 mi
Del Rio Mutual
 700 1 5.6 mi
City of Industry Waterworks Systems
La Puente		 6,151 0 5.6 mi
Cal-Am Water Company East Pasadena
 9,963 0 5.9 mi
LA Puente Valley Cwd
 8,276 0 6.3 mi
Sierra Madre-City, Water Dept.
Sierra Madre		 11,000 0 6.3 mi
Covina Valley Water Company Wholesale
 0 0 6.3 mi
Sunny Slope Water Co.
 25,252 1 6.4 mi
Valencia Heights Water Co.
 7,775 0 6.5 mi
San Gabriel Valley Water Co.-El Monte
 240,000 0 6.6 mi
Suburban Water Systems-Covina Knolls
 1,451 0 6.6 mi
Glendora-City, Water Dept.
Glendora		 44,411 0 6.7 mi
Cal/am Water Company San Marino
 48,065 0 7.2 mi
Amarillo Mutual Water Company
 3,134 0 7.4 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
Martin Marietta Southern Calif Aggregate
 51 0 0
Irwindale Brewery Yard (iby)
 300 0 0
Usfs-Chantry Flats-A16 Water
 113 0 0
Henninger Flats
 50 0 0
Usfs-Skyline Park / Mount Wilson A-4
 25 0 0
Usfs-Red Box Station A-3
 25 0 0
Millard Canyon Improvement Association
 42 1 0
Coldbrook Campground
 38 0 0
Young-Nak Presbyterian Church
 25 0 0
Colby Ranch-United Methodist Camp
 180 0 0
Clear Creek Outdoor Education Center
 105 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Usfs-Chilao Main A-9
 50 0 0
Angeles Crest Christian Camp
 112 1 0
Rancho los Amigos Hospital
 3,200 0 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Rancho Ybarra Christian Camp
 73 0 0
Huttopia Paradise Springs
 302 1 0
Camp Elk
 121 0 0
Usfs-Jackson Lake V-4
 805 0 0
Usfs-Appletree Flats V-3
 25 0 0
Usfs-Valyermo Ranger Station
 25 1 1
Saint Andrews Abbey
 210 1 1
Mountain High East Ski Area
 150 0 0
Mount Kare Camp/kare Youth League
 59 0 0
Usfs-Big Pines V-2
 54 0 0
Angeles Shooting Ranges
 490 0 0
1000 Trails / Soledad Canyon Preserve
 812 1 0
Acton Four Square Church
 50 0 0
Acton-Agua Dulce Lds Church
 150 0 0
Acton la North KOA
 400 0 0
Acton Conservation Camp #11
 90 4 0
Vasquez Rocks County Park
 30 0 0
Ilead Agua Dulce Charter School
 450 1 1
Agua Dulce Women's Club
 50 0 0
Lang Ranch Shopping Center
 28 0 0
Wagon Wheel Plaza
 55 1 0
Agua Dulce Water System
 493 0 0
Desert Aire Golf Course
 80 0 0
Agua Dulce Winery
 113 0 0
Living Springs Church
 50 0 0
Shepherd of the Hills
 80 0 0
Los Angeles World Airports
 180 0 0
General Atomics Aeronautical Gray Butt
 405 0 0
LE Chene Restaurant Water System
 100 0 0
Lockheed Martin Skunk Works
 135 0 0
Northrop Grumman Corp.
 5,764 1 0
Antelope Valley Indian Museum State Park
 506 0 0
Lancaster National Soccer Center
Lancaster 		500 0 0
All non-community systems
About this data

Water systems are matched to Los Angeles County, nearest to Irwindale 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.

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.