Tapcensus

Water quality for ZIP code 91020

ZIP 91020 covers La Crescenta-Montrose, Glendale, and La Cañada Flintridge 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

LA Canada Irrigation Dist. CA1910054 · Community water system · Surface water purchased
Serves 9,258 people Rules violated, past 3 years 0 Last sanitary survey Nov 12, 2024 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
Crescenta Valley Cwd
 28,162 0 1.2 mi
Valley Water Co.
 10,113 0 2.3 mi
Glendale-City, Water Dept.
Glendale		 192,212 0 2.3 mi
Liberty Utilities Mesa Crest
 1,616 0 2.7 mi
Foothill Municipal Water Dist.
 0 2 3.4 mi
Lincoln Avenue Water Co.
 8,721 0 4.6 mi
Valhalla Water Association
 25 1 5.3 mi
Burbank-City, Water Dept.
Burbank		 106,146 0 5.5 mi
Las Flores Water Co.
 2,211 0 5.7 mi
Rubio Canon Land & Water Association
 6,646 0 6.1 mi
Pasadena Water and Power
Pasadena		 165,448 0 6.6 mi
City of South Pasadena
South Pasadena		 25,329 0 8.2 mi
Kinneloa Irrigation Dist.
 1,808 1 8.7 mi
Los Angeles Cwwd 21-Kagel Canyon
 736 0 9.9 mi
City of Alhambra
Alhambra		 80,279 0 10.3 mi
Sierra Madre-City, Water Dept.
Sierra Madre		 11,000 0 10.7 mi
Cal/am Water Company San Marino
 48,065 0 11.0 mi
Sunny Slope Water Co.
 25,252 1 11.2 mi
Cal-Am Water Company East Pasadena
 9,963 0 11.2 mi
San Gabriel County WD
 40,154 0 11.3 mi
Los Angeles-City, Dept. of Water & Power
Los Angeles		 3,875,566 0 12.1 mi
City of Arcadia
Arcadia		 54,236 0 12.2 mi
Monterey Park-City, Water Dept.
Monterey Park		 61,096 1 12.5 mi
Gswc-South San Gabriel
 26,451 0 12.8 mi
California Water Service Co. Ela
 142,140 0 12.8 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
Millard Canyon Improvement Association
 42 1 0
Clear Creek Outdoor Education Center
 105 0 0
Rancho Ybarra Christian Camp
 73 0 0
Usfs-Red Box Station A-3
 25 0 0
Henninger Flats
 50 0 0
Colby Ranch-United Methodist Camp
 180 0 0
Young-Nak Presbyterian Church
 25 0 0
Usfs-Skyline Park / Mount Wilson A-4
 25 0 0
Angeles Shooting Ranges
 490 0 0
Usfs-Chantry Flats-A16 Water
 113 0 0
Usfs-Monte Cristo Camp T-4
 116 0 0
Martin Marietta Southern Calif Aggregate
 51 0 0
Acton la North KOA
 400 0 0
Acton Conservation Camp #11
 90 4 0
1000 Trails / Soledad Canyon Preserve
 812 1 0
Angeles Crest Christian Camp
 112 1 0
Usfs-Chilao Main A-9
 50 0 0
Irwindale Brewery Yard (iby)
 300 0 0
Acton Four Square Church
 50 0 0
Acton-Agua Dulce Lds Church
 150 0 0
Plant Water Well Rockview Dairy
South Gate 		45 0 0
Rancho los Amigos Hospital
 3,200 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
Coldbrook Campground
 38 0 0
Texas Canyon Ranger Station
 30 0 0
Usfs-Crystal Lake B-13 Water
 2,000 0 0
Saint Andrews Abbey
 210 1 1
Anchor Retreat Center
 202 0 0
Usfs-Valyermo Ranger Station
 25 1 1
Huttopia Paradise Springs
 302 1 0
Desert Aire Golf Course
 80 0 0
Lockheed Martin Skunk Works
 135 0 0
Los Angeles World Airports
 180 0 0
Camp Elk
 121 0 0
Northrop Grumman Corp.
 5,764 1 0
Usfs-Jackson Lake V-4
 805 0 0
Usfs-Appletree Flats V-3
 25 0 0
Lancaster National Soccer Center
Lancaster 		500 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
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.