Tapcensus

Water quality for ZIP code 91745

ZIP 91745 covers Hacienda Heights, Industry, and Rowland Heights 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

Suburban Water Systems-San Jose CA1910205 · Community water system · Surface water purchased
Serves 170,523 people Rules violated, past 3 years 0 Last sanitary survey Aug 14, 2024 Distance 3.9 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
LA Puente Valley Cwd
 8,276 0 2.0 mi
City of Industry Waterworks Systems
La Puente		 6,151 0 2.2 mi
LA Habra Heights Cwd
 5,682 0 3.0 mi
California Domestic Water Company
 0 0 3.8 mi
Rowland Water District
 56,100 0 3.9 mi
San Gabriel Valley Water Co.-El Monte
 240,000 0 3.9 mi
Whittier-City, Water Dept.
Whittier		 49,954 0 3.9 mi
Suburban Water Systems-Whittier
 66,565 0 4.2 mi
Del Rio Mutual
 700 1 4.5 mi
Orchard Dale Water District
 25,000 0 5.5 mi
Sterling Mutual Water Company
 198 2 6.0 mi
Valley View Mutual Water Co.
 4,613 0 6.2 mi
EL Monte-City, Water Dept.
El Monte		 23,000 0 6.4 mi
Pico WD
 22,051 0 6.5 mi
Pico Rivera City, Water Dept.
Pico Rivera		 39,451 0 6.7 mi
Suburban Water Systems-La Mirada
 57,240 0 6.9 mi
Hemlock Mutual Water Co.
 686 2 6.9 mi
San Gabriel Valley Water Co-Montebello 1
 5,205 0 6.9 mi
Valley County Water Dist.
 68,871 0 6.9 mi
Santa FE Springs City, Water Dept.
Santa Fe Springs		 19,219 0 7.0 mi
Valencia Heights Water Co.
 7,775 0 7.3 mi
Gswc Norwalk
 43,167 0 7.6 mi
Amarillo Mutual Water Company
 3,134 0 7.7 mi
Walnut Valley Water District
 100,941 0 7.9 mi
Gswc-South Arcadia
 27,430 0 7.9 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
Martin Marietta Southern Calif Aggregate
 51 0 0
Irwindale Brewery Yard (iby)
 300 0 0
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Rancho los Amigos Hospital
 3,200 0 0
Usfs-Chantry Flats-A16 Water
 113 0 0
Young-Nak Presbyterian Church
 25 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
Coldbrook Campground
 38 0 0
Clear Creek Outdoor Education Center
 105 0 0
Colby Ranch-United Methodist Camp
 180 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
Usfs-Chilao Main A-9
 50 0 0
Angeles Crest Christian Camp
 112 1 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Rancho Ybarra Christian Camp
 73 0 0
Huttopia Paradise Springs
 302 1 0
Usfs-Jackson Lake V-4
 805 0 0
Usfs-Appletree Flats V-3
 25 0 0
Camp Elk
 121 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
Angeles Shooting Ranges
 490 0 0
Usfs-Valyermo Ranger Station
 25 1 1
Saint Andrews Abbey
 210 1 1
1000 Trails / Soledad Canyon Preserve
 812 1 0
Acton la North KOA
 400 0 0
Acton Four Square Church
 50 0 0
Acton-Agua Dulce Lds Church
 150 0 0
Acton Conservation Camp #11
 90 4 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
General Atomics Aeronautical Gray Butt
 405 0 0
Lockheed Martin Skunk Works
 135 0 0
Texas Canyon Ranger Station
 30 0 0
Northrop Grumman Corp.
 5,764 1 0
Antelope Valley Indian Museum State Park
 506 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.