Tapcensus

Water quality in El Monte, California

El Monte 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

EL Monte-City, Water Dept. CA1910038 · Community water system · Ground water · El Monte
Serves 23,000 people Rules violated, past 3 years 0 Last sanitary survey Nov 12, 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 Los Angeles County

198 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Sterling Mutual Water Company
 198 2 1.6 mi
Del Rio Mutual
 700 1 2.0 mi
Amarillo Mutual Water Company
 3,134 0 2.4 mi
Hemlock Mutual Water Co.
 686 2 2.5 mi
Gswc-South Arcadia
 27,430 0 2.5 mi
San Gabriel Valley Water Co.-El Monte
 240,000 0 2.9 mi
San Gabriel County WD
 40,154 0 3.4 mi
Sunny Slope Water Co.
 25,252 1 3.5 mi
Gswc-South San Gabriel
 26,451 0 3.5 mi
Cal/am Water Company San Marino
 48,065 0 3.5 mi
Valley View Mutual Water Co.
 4,613 0 3.7 mi
Cal-Am Water Company East Pasadena
 9,963 0 3.8 mi
San Gabriel Valley Water Co-Montebello 1
 5,205 0 4.3 mi
City of Arcadia
Arcadia		 54,236 0 4.3 mi
Valley County Water Dist.
 68,871 0 4.9 mi
City of Industry Waterworks Systems
La Puente		 6,151 0 5.0 mi
Monterey Park-City, Water Dept.
Monterey Park		 61,096 1 5.6 mi
City of Alhambra
Alhambra		 80,279 0 5.6 mi
Montebello Land & Water Co.
 26,554 1 5.7 mi
Pico Rivera City, Water Dept.
Pico Rivera		 39,451 0 6.0 mi
Cal-Am Water Company Duarte
 24,767 0 6.1 mi
Pico WD
 22,051 0 6.1 mi
LA Puente Valley Cwd
 8,276 0 6.2 mi
Whittier-City, Water Dept.
Whittier		 49,954 0 6.3 mi
Sierra Madre-City, Water Dept.
Sierra Madre		 11,000 0 6.6 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
Young-Nak Presbyterian Church
 25 0 0
Usfs-Skyline Park / Mount Wilson A-4
 25 0 0
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Millard Canyon Improvement Association
 42 1 0
Rancho los Amigos Hospital
 3,200 0 0
Usfs-Red Box Station A-3
 25 0 0
Clear Creek Outdoor Education Center
 105 0 0
Colby Ranch-United Methodist Camp
 180 0 0
Coldbrook Campground
 38 0 0
Angeles Crest Christian Camp
 112 1 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Usfs-Chilao Main A-9
 50 0 0
Rancho Ybarra Christian Camp
 73 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
Angeles Shooting Ranges
 490 0 0
Huttopia Paradise Springs
 302 1 0
1000 Trails / Soledad Canyon Preserve
 812 1 0
Saint Andrews Abbey
 210 1 1
Usfs-Valyermo Ranger Station
 25 1 1
Camp Elk
 121 0 0
Usfs-Jackson Lake V-4
 805 0 0
Usfs-Appletree Flats V-3
 25 0 0
Acton la North KOA
 400 0 0
Acton Four Square Church
 50 0 0
Mountain High East Ski Area
 150 0 0
Acton Conservation Camp #11
 90 4 0
Mount Kare Camp/kare Youth League
 59 0 0
Usfs-Big Pines V-2
 54 0 0
Acton-Agua Dulce Lds Church
 150 0 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
Agua Dulce Winery
 113 0 0
Shepherd of the Hills
 80 0 0
Living Springs Church
 50 0 0
LE Chene Restaurant Water System
 100 0 0
Desert Aire Golf Course
 80 0 0
Los Angeles World Airports
 180 0 0
Lockheed Martin Skunk Works
 135 0 0
Texas Canyon Ranger Station
 30 0 0
Northrop Grumman Corp.
 5,764 1 0
Anchor Retreat Center
 202 0 0
General Atomics Aeronautical Gray Butt
 405 0 0
All non-community systems
About this data

Water systems are matched to Los Angeles County, nearest to El Monte 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.