Tapcensus

Water quality for ZIP code 92377

ZIP 92377 covers Rialto in San Bernardino County, California, one of 91 ZIP codes in the county. 321 active public water systems serve the county; 146 had an EPA violation in the past three years.

Most likely your provider

San Gabriel Valley WC Fontana CA3610041 · Community water system · Surface water
Serves 228,270 people Rules violated, past 3 years 0 Last sanitary survey Apr 13, 2022 Distance 5.6 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 San Bernardino County

146 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
West Valley Water District
 96,123 0 3.3 mi
Muscoy Mwc No. 1
 13,000 1 3.5 mi
Rialto, City of
Rialto		 59,264 0 3.9 mi
Devore WC
 1,574 0 5.4 mi
San Bernardino City
San Bernardin0		 214,665 0 5.7 mi
Marygold Mwc
 3,155 1 5.8 mi
Terrace Water Company
 2,400 0 6.7 mi
Gilbert Street Complex
 124 2 7.4 mi
Camp Waterman Mwc
 55 1 7.7 mi
Valley View Park Mwc
 499 1 7.8 mi
Lytle Springs WC
 475 0 8.1 mi
Cedarpines Park Mwc
 2,458 0 8.2 mi
Valley of Enchantment Mwc
 2,471 1 8.5 mi
Colton, City of
Colton		 46,525 0 8.6 mi
Cucamonga Valley Water District
 213,375 0 9.3 mi
Crestline Village Cwd Division 10
 11,650 0 9.4 mi
Cdf Pilot Rock Conservation Camp
 65 1 10.6 mi
Strawberry Lodge Mwc
 381 1 10.7 mi
Loma Linda University
 455 0 10.9 mi
Riverside Highland Water Company
 19,053 1 11.0 mi
Lacsd Rimforest
 717 0 11.5 mi
Alpine Water Users Association
 2,534 0 11.7 mi
Loma Linda, City of
Loma Linda		 25,208 0 11.7 mi
East Valley Water District
 108,600 0 12.4 mi
Clawa
 2,320 0 12.7 mi
All 147 community water systems in San Bernardino County
Non-community systems in San Bernardino County (174: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Glen Helen Truck Parking Facility
 25 0 0
Arrowhead Regional Medical Center
 4,500 0 0
Hidden Acres
 25 0 0
Bonita Ranch RV Campground
 400 1 0
Socal Mobile Food Facility
Colton 		25 0 0
Mountain Streams RV Park
 16 1 0
Applewhite Campground
 3,177 1 0
Thousand Pines Christian
 28 1 1
Church of Spiritual Technology
 51 1 0
Silverwood Japanese Restaurant Sushi & G
 25 1 0
Petrolink Hwy 138 INC
 25 0 0
Alpine Retreat and Camp
 309 0 0
SS Hert Trucking INC
 25 0 0
Best Western Cajon Pass
 34 1 0
Lytle Creek Administration Site
 100 5 3
MT Baldy Ski Lift
 1,000 0 0
Forest Lawn Scout Reservation
 200 2 0
Pali Overnight Adventures
 54 0 0
Joshua Inn
 25 1 0
Dovid Oved Retreat Center
 100 0 0
Calvary Chapel Christian Camp
 34 0 0
Ponderosa Pines Christian Camp
 202 0 0
Camp Cedar Crest
 310 1 0
Green Valley Campground
 3,029 0 0
8986 Deep Creek Road
 300 1 0
Snow Valley Mountain Resort
 35 2 0
The High Adobe
 25 0 0
Loch Leven Christian Camp & Conference C
 100 1 0
Burger King #9310
 510 1 0
Big Pine Flats Admin & Recreation
 417 0 0
Redlands Colony Pipeline Association
 21 1 1
Lone Wolf Colony
 114 0 0
Camp Angelus TR Land Assn
 57 0 0
Parrish Ranch
 25 0 0
Hanna Flats Campground
 4,850 0 0
YMCA Camp Whittle
 30 1 0
R W Ranch
 101 0 0
OG Investments, LLC
 30 0 0
Camp Cedar Falls
 405 0 0
Seven Oaks MT Resort MHP
 321 0 0
Forest Home Christian CC
 100 2 0
Los Rios Rancho Water System
 46 1 0
Riley's Log Cabin Farm
 105 1 0
Riley's Farm
 2,400 1 0
Cemex Calif Cement LLC VV
 100 1 1
Holland Burger Cafe
 100 2 0
DE Benneville Pines
 63 0 0
Big Bear Shores RV Resort
 132 0 0
Holcomb Valley Ranch
 250 2 0
Crazzy's Wasewagan Camp
 198 0 0
All non-community systems
About this data

Water systems are matched to San Bernardino 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 or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.

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.