Tapcensus

Water quality for ZIP code 90602

ZIP 90602 covers Whittier and South Whittier 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

Whittier-City, Water Dept. CA1910173 · Community water system · Ground water · Whittier
Serves 49,954 people Rules violated, past 3 years 0 Last sanitary survey Nov 16, 2023 Distance 1.1 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
Suburban Water Systems-Whittier
 66,565 0 2.0 mi
California Domestic Water Company
 0 0 2.7 mi
Orchard Dale Water District
 25,000 0 2.7 mi
Santa FE Springs City, Water Dept.
Santa Fe Springs		 19,219 0 3.7 mi
Pico WD
 22,051 0 4.0 mi
San Gabriel Valley Water Co.-El Monte
 240,000 0 4.1 mi
LA Habra Heights Cwd
 5,682 0 4.2 mi
Pico Rivera City, Water Dept.
Pico Rivera		 39,451 0 4.2 mi
Gswc Norwalk
 43,167 0 4.4 mi
Suburban Water Systems-La Mirada
 57,240 0 4.8 mi
City of Industry Waterworks Systems
La Puente		 6,151 0 5.1 mi
Del Rio Mutual
 700 1 5.2 mi
San Gabriel Valley Water Co-Montebello 1
 5,205 0 5.3 mi
LA Puente Valley Cwd
 8,276 0 5.3 mi
South Montebello Irrigation Dist.
 15,021 0 5.7 mi
Montebello Land & Water Co.
 26,554 1 5.8 mi
Norwalk City, Water Dept.
Norwalk		 20,283 1 5.9 mi
San Gabriel Valley Water Co-Montebello 2
Montebello		 3,731 0 6.1 mi
Liberty Utilities Bellflower-Norwalk
 72,472 0 6.5 mi
Rowland Water District
 56,100 0 6.5 mi
Downey City, Water Dept.
Downey		 110,556 0 6.7 mi
EL Monte-City, Water Dept.
El Monte		 23,000 0 7.0 mi
City of Bell Gardens
Bell Gardens		 11,413 0 7.2 mi
Amarillo Mutual Water Company
 3,134 0 7.3 mi
Suburban Water Systems-San Jose
 170,523 0 7.3 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
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Rancho los Amigos Hospital
 3,200 0 0
Martin Marietta Southern Calif Aggregate
 51 0 0
Irwindale Brewery Yard (iby)
 300 0 0
Young-Nak Presbyterian Church
 25 0 0
Usfs-Chantry Flats-A16 Water
 113 0 0
Henninger Flats
 50 0 0
Usfs-Skyline Park / Mount Wilson A-4
 25 0 0
Millard Canyon Improvement Association
 42 1 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-Chilao Main A-9
 50 0 0
Rancho Ybarra Christian Camp
 73 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Angeles Shooting Ranges
 490 0 0
Huttopia Paradise Springs
 302 1 0
Usfs-Jackson Lake V-4
 805 0 0
Camp Elk
 121 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
Saint Andrews Abbey
 210 1 1
Usfs-Valyermo Ranger Station
 25 1 1
1000 Trails / Soledad Canyon Preserve
 812 1 0
Acton la North KOA
 400 0 0
Acton Conservation Camp #11
 90 4 0
Acton Four Square Church
 50 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
Texas Canyon Ranger Station
 30 0 0
Lockheed Martin Skunk Works
 135 0 0
General Atomics Aeronautical Gray Butt
 405 0 0
Northrop Grumman Corp.
 5,764 1 0
Anchor Retreat Center
 202 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.