Tapcensus

Water quality for ZIP code 90221

ZIP 90221 covers Compton, East Rancho Dominguez, Carson, and Lynwood 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

Compton-City, Water Dept. CA1910026 · Community water system · Surface water purchased · Compton
Serves 90,986 people Rules violated, past 3 years 0 Last sanitary survey Apr 3, 2025 Distance 1.3 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
Liberty Utilities Lynwood
 24,649 0 1.2 mi
Suburban Water Systems Sativa
 4,372 0 2.3 mi
Lynwood Park Mutual Water Co.
 1,564 1 2.3 mi
Paramount City, Water Dept.
Paramount		 55,200 0 2.4 mi
Lynwood-City, Water Dept.
Lynwood		 66,967 0 2.7 mi
Gswc Willowbrook
 10,793 0 2.9 mi
Liberty Utilities Compton
 26,316 0 3.1 mi
Gswc Hollydale
 8,099 0 3.2 mi
Bellflower Home Garden Water Company
 1,129 1 3.5 mi
South Gate-City, Water Dept.
South Gate		 88,544 0 4.4 mi
Bellflower Somerset Mwc
 46,300 0 4.7 mi
California Water Service Co. Dominguez
 149,490 0 4.9 mi
Lakewood City, Water Dept.
Lakewood		 66,356 0 5.0 mi
Tract 349 Mutual Water Co.
 8,700 0 5.6 mi
Tract 180 Mutual Water Co.
 14,000 1 5.6 mi
Downey City, Water Dept.
Downey		 110,556 0 5.6 mi
Walnut Park Mutual Water Co.
 16,180 1 5.8 mi
Gswc Bell, Bell Gardens
 55,050 0 6.1 mi
Signal Hill City, Water Dept.
Signal Hill		 11,848 3 6.1 mi
Gswc Florence/graham
 63,472 0 6.2 mi
Long Beach Utilities Department
Long Beach		 466,772 0 6.2 mi
Liberty Utilities Bellflower-Norwalk
 72,472 0 6.4 mi
Gswc Southwest
 277,740 0 6.4 mi
Huntington Park-City, Water Dept.
Huntington Park		 15,437 0 6.5 mi
City of Bell Gardens
Bell Gardens		 11,413 0 6.8 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
Rancho los Amigos Hospital
 3,200 0 0
Plant Water Well Rockview Dairy
South Gate 		45 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
Millard Canyon Improvement Association
 42 1 0
Usfs-Chantry Flats-A16 Water
 113 0 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
Rancho Ybarra Christian Camp
 73 0 0
Colby Ranch-United Methodist Camp
 180 0 0
Angeles Shooting Ranges
 490 0 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Angeles Crest Christian Camp
 112 1 0
Coldbrook Campground
 38 0 0
Usfs-Chilao Main A-9
 50 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
Acton la North KOA
 400 0 0
Acton Conservation Camp #11
 90 4 0
1000 Trails / Soledad Canyon Preserve
 812 1 0
Acton Four Square Church
 50 0 0
Acton-Agua Dulce Lds Church
 150 0 0
Huttopia Paradise Springs
 302 1 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
Saint Andrews Abbey
 210 1 1
Usfs-Valyermo Ranger Station
 25 1 1
Agua Dulce Winery
 113 0 0
LE Chene Restaurant Water System
 100 0 0
Camp Elk
 121 0 0
Shepherd of the Hills
 80 0 0
Living Springs Church
 50 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
Texas Canyon Ranger Station
 30 0 0
Anchor Retreat Center
 202 0 0
Desert Aire Golf Course
 80 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, 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.