Water quality for ZIP code 92350
ZIP 92350 covers Loma Linda 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
Other community water systems in San Bernardino County
146 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| San Bernardino City San Bernardin0 |
214,665 | 0 | |
| Cucamonga Valley Water District |
213,375 | 0 | |
| Ontario Municipal Utilities Company Ontario |
185,010 | 0 | |
| Victorville Water District |
140,721 | 0 | |
| San Bernardino Valley WD |
109,608 | 0 | |
| East Valley Water District |
108,600 | 0 | |
| Hesperia WD |
101,836 | 0 | |
| West Valley Water District |
96,123 | 0 | |
| Chino, City of Chino |
90,187 | 0 | |
| Upland, City of Upland |
78,376 | 0 | |
| Redlands City Mud-Water Div Redlands |
78,025 | 0 | |
| Chino Hills, City of Chino Hills |
76,314 | 0 | |
| Liberty Utilities (av Ranchos) Corp. |
63,381 | 0 | |
| Rialto, City of Rialto |
59,264 | 0 | |
| Monte Vista WD |
56,390 | 0 | |
| Yucaipa Valley Water District |
52,202 | 3 | |
| Colton, City of Colton |
46,525 | 0 | |
| Adelanto, City of Adelanto |
39,930 | 1 | |
| Golden State Water CO Barstow |
32,445 | 0 | |
| HI Desert WD |
26,660 | 1 | |
| Big Bear Lake Dwp Big Bear System |
26,164 | 0 | |
| Loma Linda, City of Loma Linda |
25,208 | 0 | |
| Phelan Pinon Hills Csd |
24,509 | 0 | |
| Riverside Highland Water Company |
19,053 | 1 | |
| Twentynine Palms Water District |
18,795 | 0 |
Non-community systems in San Bernardino County (174: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to San Bernardino County, the county this ZIP code lies in, largest 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.
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.