Water quality for ZIP code 92521
ZIP 92521 covers Riverside in Riverside County, California, one of 71 ZIP codes in the county. 198 active public water systems serve the county; 66 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Riverside County
93 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Riverside, City of Riverside |
302,776 | 0 | |
| Coachella Vwd: Cove Community |
270,000 | 0 | |
| Elsinore Valley Mwd |
169,455 | 0 | |
| Corona, City of Corona |
169,380 | 6 | |
| Rancho California Water District |
146,147 | 0 | |
| Jurupa Community SD |
134,638 | 0 | |
| Indio Water Authority |
89,137 | 1 | |
| Western Mwd |
87,955 | 0 | |
| Desert Water Agency |
75,588 | 0 | |
| Beaumont Cherry Valley WD |
66,841 | 0 | |
| Lake Hemet Mwd |
52,913 | 0 | |
| Coachella Water Authority Coachella |
43,590 | 2 | |
| Mission Springs WD |
43,484 | 0 | |
| Rubidoux Community SD |
38,522 | 1 | |
| Hemet, City of Hemet |
33,591 | 0 | |
| Banning, City of Banning |
31,680 | 0 | |
| Norco, City of Norco |
25,068 | 5 | |
| Temescal Valley Water District |
22,268 | 1 | |
| San Jacinto, City of San Jacinto |
20,938 | 0 | |
| Western Mwd Murrieta Division |
17,837 | 0 | |
| South Mesa WC |
10,348 | 0 | |
| Blythe City of Blythe |
9,735 | 0 | |
| Myoma Dunes Mutual Water Company |
9,445 | 0 | |
| Nuevo Water Company |
6,733 | 0 | |
| Santa Ana River Water Company |
6,475 | 0 |
Non-community systems in Riverside County (104: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Riverside 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.