Tapcensus

Water quality for ZIP code 91042

ZIP 91042 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 17.3 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
Valhalla Water Association
 25 1 2.4 mi
Crescenta Valley Cwd
 28,162 0 6.6 mi
LA Canada Irrigation Dist.
 9,258 0 7.4 mi
Liberty Utilities Mesa Crest
 1,616 0 8.1 mi
Los Angeles Cwwd 21-Kagel Canyon
 736 0 8.2 mi
Valley Water Co.
 10,113 0 9.1 mi
Cali Lake RV Resort
 99 0 9.2 mi
Foothill Municipal Water Dist.
 0 2 9.2 mi
Lincoln Avenue Water Co.
 8,721 0 9.7 mi
Glendale-City, Water Dept.
Glendale		 192,212 0 9.9 mi
Las Flores Water Co.
 2,211 0 10.4 mi
Burbank-City, Water Dept.
Burbank		 106,146 0 10.5 mi
Rivers End Trailer Park
 35 2 10.5 mi
Rubio Canon Land & Water Association
 6,646 0 11.1 mi
Los Angeles Cwwd 37-Acton
 4,782 0 11.5 mi
San Fernando-City, Water Dept.
San Fernando		 23,364 0 11.6 mi
Casa Dulce Estates
 26 0 12.5 mi
Pasadena Water and Power
Pasadena		 165,448 0 12.8 mi
Kinneloa Irrigation Dist.
 1,808 1 13.3 mi
North Trails Mutual Water Company
 100 3 13.5 mi
Spv Water Company
 211 0 13.8 mi
Oak Grove Mobile Home Park
 109 1 14.7 mi
Sleepy Valley Water Company
 160 0 14.8 mi
Sierra Madre-City, Water Dept.
Sierra Madre		 11,000 0 15.1 mi
City of South Pasadena
South Pasadena		 25,329 0 15.4 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
Rancho Ybarra Christian Camp
 73 0 0
Clear Creek Outdoor Education Center
 105 0 0
Angeles Shooting Ranges
 490 0 0
Colby Ranch-United Methodist Camp
 180 0 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Acton la North KOA
 400 0 0
Acton Conservation Camp #11
 90 4 0
1000 Trails / Soledad Canyon Preserve
 812 1 0
Millard Canyon Improvement Association
 42 1 0
Usfs-Red Box Station A-3
 25 0 0
Acton Four Square Church
 50 0 0
Acton-Agua Dulce Lds Church
 150 0 0
Usfs-Skyline Park / Mount Wilson A-4
 25 0 0
Henninger Flats
 50 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
Usfs-Chantry Flats-A16 Water
 113 0 0
Shepherd of the Hills
 80 0 0
Living Springs Church
 50 0 0
Angeles Crest Christian Camp
 112 1 0
LE Chene Restaurant Water System
 100 0 0
Usfs-Chilao Main A-9
 50 0 0
Young-Nak Presbyterian Church
 25 0 0
Texas Canyon Ranger Station
 30 0 0
Anchor Retreat Center
 202 0 0
Martin Marietta Southern Calif Aggregate
 51 0 0
Lockheed Martin Skunk Works
 135 0 0
Desert Aire Golf Course
 80 0 0
Saint Andrews Abbey
 210 1 1
Irwindale Brewery Yard (iby)
 300 0 0
Los Angeles World Airports
 180 0 0
Coldbrook Campground
 38 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
Usfs-Valyermo Ranger Station
 25 1 1
Northrop Grumman Corp.
 5,764 1 0
Huttopia Paradise Springs
 302 1 0
Lancaster National Soccer Center
Lancaster 		500 0 0
Mira Loma High Desert Hospital
 500 0 0
Hughes-Elizabeth Lake Unified School Dis
 550 2 1
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Rancho los Amigos Hospital
 3,200 0 0
Del Sur School/westside Union District
 825 1 0
Camp Elk
 121 0 0
TN Truss
 35 1 0
Usfs-Jackson Lake V-4
 805 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.