Water quality in Poway, California
Poway is in San Diego County. 198 active public water systems serve the county; 83 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in San Diego County
81 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Rincon del Diablo Mwd (id-A) |
5,016 | 0 | 6.4 mi | |
| Del Dios Mutual Water Company |
330 | 3 | 7.9 mi | |
| San Pasqual Academy |
298 | 0 | 8.5 mi | |
| Ramona Municipal WD |
36,455 | 0 | 8.6 mi | |
| Lakeside WD |
35,500 | 1 | 9.7 mi | |
| Rincon del Diablo Mwd (id-1) |
28,427 | 0 | 9.8 mi | |
| Olivenhain Mwd |
86,458 | 0 | 9.8 mi | |
| Escondido, City of Escondido |
137,044 | 0 | 10.2 mi | |
| Santa FE I.d. |
21,539 | 0 | 11.0 mi | |
| San Diego County Water Authority |
0 | 0 | 11.3 mi | |
| San Diego, City of San Diego |
1,408,937 | 0 | 12.3 mi | |
| Oakvale Park |
260 | 3 | 12.8 mi | |
| Del Mar, City of Del Mar |
3,950 | 0 | 13.4 mi | |
| Lake Wohlford Resort |
250 | 0 | 13.4 mi | |
| Padre Dam Mwd |
93,980 | 0 | 13.9 mi | |
| Vallecitos WD |
114,700 | 1 | 14.3 mi | |
| Helix Water District |
277,918 | 0 | 14.4 mi | |
| San Dieguito WD |
40,405 | 1 | 15.1 mi | |
| Rancho Santa Teresa MW Co. |
102 | 2 | 15.3 mi | |
| Valley Center Mwd |
30,166 | 0 | 18.1 mi | |
| Vista Irrigation District |
134,501 | 0 | 18.2 mi | |
| Carlsbad Mwd |
96,371 | 0 | 18.2 mi | |
| Alpine Oaks Estates LLC |
185 | 0 | 20.1 mi | |
| Willowside Terrace Water Association |
100 | 2 | 20.8 mi | |
| Lazy H Mutual Water Company |
117 | 0 | 21.5 mi |
Non-community systems in San Diego County (116: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to San Diego County, nearest to Poway 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.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 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.