Tapcensus

Water quality in Downey, California

Downey 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

Downey City, Water Dept. CA1910034 · Community water system · Ground water · Downey
Serves 110,556 people Rules violated, past 3 years 0 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
Gswc Hollydale
 8,099 0 2.4 mi
City of Bell Gardens
Bell Gardens		 11,413 0 2.6 mi
Gswc Bell, Bell Gardens
 55,050 0 3.1 mi
Liberty Utilities Bellflower-Norwalk
 72,472 0 3.2 mi
Tract 180 Mutual Water Co.
 14,000 1 3.3 mi
San Gabriel Valley Water Co-Montebello 2
Montebello		 3,731 0 3.3 mi
Paramount City, Water Dept.
Paramount		 55,200 0 3.5 mi
Norwalk City, Water Dept.
Norwalk		 20,283 1 3.6 mi
Santa FE Springs City, Water Dept.
Santa Fe Springs		 19,219 0 3.8 mi
Gswc Norwalk
 43,167 0 3.8 mi
Bellflower Somerset Mwc
 46,300 0 3.9 mi
South Gate-City, Water Dept.
South Gate		 88,544 0 3.9 mi
Tract 349 Mutual Water Co.
 8,700 0 4.0 mi
South Montebello Irrigation Dist.
 15,021 0 4.1 mi
Lynwood-City, Water Dept.
Lynwood		 66,967 0 4.2 mi
Commerce-City, Water Dept.
Montebello		 3,598 0 4.2 mi
Liberty Utilities Lynwood
 24,649 0 4.4 mi
Bellflower Home Garden Water Company
 1,129 1 4.7 mi
Pico WD
 22,051 0 4.7 mi
Maywood Mutual Water Co. #2
 6,349 0 4.7 mi
Maywood Mutual Water Co. #3
 6,059 0 4.7 mi
Pico Rivera City, Water Dept.
Pico Rivera		 39,451 0 4.8 mi
Maywood Mutual Water Co. #1
 3,851 0 4.8 mi
Montebello Land & Water Co.
 26,554 1 5.4 mi
Walnut Park Mutual Water Co.
 16,180 1 5.6 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
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Rancho los Amigos Hospital
 3,200 0 0
Young-Nak Presbyterian Church
 25 0 0
Martin Marietta Southern Calif Aggregate
 51 0 0
Irwindale Brewery Yard (iby)
 300 0 0
Henninger Flats
 50 0 0
Usfs-Chantry Flats-A16 Water
 113 0 0
Millard Canyon Improvement Association
 42 1 0
Usfs-Skyline Park / Mount Wilson A-4
 25 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
Rancho Ybarra Christian Camp
 73 0 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Angeles Shooting Ranges
 490 0 0
Coldbrook Campground
 38 0 0
Angeles Crest Christian Camp
 112 1 0
Usfs-Chilao Main A-9
 50 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
1000 Trails / Soledad Canyon Preserve
 812 1 0
Acton la North KOA
 400 0 0
Acton Conservation Camp #11
 90 4 0
Huttopia Paradise Springs
 302 1 0
Acton Four Square Church
 50 0 0
Acton-Agua Dulce Lds Church
 150 0 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
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
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
Texas Canyon Ranger Station
 30 0 0
Desert Aire Golf Course
 80 0 0
Anchor Retreat Center
 202 0 0
Los Angeles World Airports
 180 0 0
Lockheed Martin Skunk Works
 135 0 0
Northrop Grumman Corp.
 5,764 1 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 Downey 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.