Tapcensus

Water quality for ZIP code 90031

ZIP 90031 covers Los Angeles 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

Los Angeles-City, Dept. of Water & Power CA1910067 · Community water system · Surface water · Los Angeles
Serves 3,875,566 people Rules violated, past 3 years 0 Distance 11.6 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
City of South Pasadena
South Pasadena		 25,329 0 3.4 mi
City of Alhambra
Alhambra		 80,279 0 4.2 mi
California Water Service Co. Ela
 142,140 0 4.2 mi
Monterey Park-City, Water Dept.
Monterey Park		 61,096 1 5.0 mi
Vernon-City, Water Dept.
Vernon		 28,112 0 5.6 mi
Gswc-South San Gabriel
 26,451 0 6.5 mi
San Gabriel County WD
 40,154 0 6.6 mi
Pasadena Water and Power
Pasadena		 165,448 0 6.7 mi
Maywood Mutual Water Co. #3
 6,059 0 6.8 mi
Maywood Mutual Water Co. #2
 6,349 0 6.8 mi
Commerce-City, Water Dept.
Montebello		 3,598 0 6.9 mi
Maywood Mutual Water Co. #1
 3,851 0 6.9 mi
Glendale-City, Water Dept.
Glendale		 192,212 0 7.0 mi
Cal/am Water Company San Marino
 48,065 0 7.0 mi
Huntington Park-City, Water Dept.
Huntington Park		 15,437 0 7.3 mi
Amarillo Mutual Water Company
 3,134 0 7.5 mi
Montebello Land & Water Co.
 26,554 1 7.5 mi
Valley Water Co.
 10,113 0 7.8 mi
Sunny Slope Water Co.
 25,252 1 7.9 mi
San Gabriel Valley Water Co-Montebello 1
 5,205 0 8.0 mi
South Montebello Irrigation Dist.
 15,021 0 8.0 mi
Walnut Park Mutual Water Co.
 16,180 1 8.0 mi
Gswc Florence/graham
 63,472 0 8.2 mi
San Gabriel Valley Water Co-Montebello 2
Montebello		 3,731 0 8.2 mi
Gswc Bell, Bell Gardens
 55,050 0 8.3 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
Young-Nak Presbyterian Church
 25 0 0
Millard Canyon Improvement Association
 42 1 0
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Rancho los Amigos Hospital
 3,200 0 0
Henninger Flats
 50 0 0
Usfs-Red Box Station A-3
 25 0 0
Usfs-Chantry Flats-A16 Water
 113 0 0
Martin Marietta Southern Calif Aggregate
 51 0 0
Usfs-Skyline Park / Mount Wilson A-4
 25 0 0
Clear Creek Outdoor Education Center
 105 0 0
Rancho Ybarra Christian Camp
 73 0 0
Irwindale Brewery Yard (iby)
 300 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
Usfs-Chilao Main A-9
 50 0 0
Acton la North KOA
 400 0 0
Acton Conservation Camp #11
 90 4 0
Coldbrook Campground
 38 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
Usfs-Crystal Lake B-13 Water
 2,000 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
LE Chene Restaurant Water System
 100 0 0
Living Springs Church
 50 0 0
Saint Andrews Abbey
 210 1 1
Huttopia Paradise Springs
 302 1 0
Usfs-Valyermo Ranger Station
 25 1 1
Texas Canyon Ranger Station
 30 0 0
Camp Elk
 121 0 0
Usfs-Jackson Lake V-4
 805 0 0
Usfs-Appletree Flats V-3
 25 0 0
Anchor Retreat Center
 202 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
Desert Aire Golf Course
 80 0 0
Lockheed Martin Skunk Works
 135 0 0
Los Angeles World Airports
 180 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.