Water quality in San Joaquin, California
San Joaquin is in Fresno County. 339 active public water systems serve the county; 128 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 Fresno County
101 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Tranquillity Irrigation District |
686 | 3 | 4.9 mi | |
| Helm School |
25 | 1 | 6.9 mi | |
| Cantua Creek Vineyards, Iv, Llc. |
55 | 0 | 10.2 mi | |
| Kerman, City of Kerman |
17,256 | 0 | 10.6 mi | |
| Fcsa 32 Cantua Creek |
468 | 0 | 10.6 mi | |
| Rau Dairy |
66 | 0 | 11.5 mi | |
| CC Farms, Llc. |
82 | 0 | 12.0 mi | |
| Five Points Ranch |
95 | 0 | 13.0 mi | |
| Britz/colusa |
40 | 1 | 13.1 mi | |
| Britz/five Points |
76 | 1 | 13.2 mi | |
| Fcsa 30 EL Porvenir |
241 | 1 | 13.5 mi | |
| Fcsa 49 Five Points |
440 | 0 | 14.7 mi | |
| Westside Harvesting |
69 | 1 | 14.7 mi | |
| Murrieta/hernandez Farms |
25 | 4 | 14.8 mi | |
| Mendota, City of Mendota |
12,595 | 0 | 14.8 mi | |
| Fcsa 43 Raisin City |
182 | 0 | 15.6 mi | |
| Biola Community Services Dist |
1,427 | 0 | 16.4 mi | |
| Harris Farms Headquarters |
140 | 2 | 18.2 mi | |
| Lanare Community Services Dist |
540 | 0 | 18.5 mi | |
| Harris Farms/horse Barn |
20 | 0 | 19.0 mi | |
| Countryside Care Center |
56 | 0 | 19.5 mi | |
| Fcsa 39 a and B |
395 | 0 | 19.6 mi | |
| Las Deltas Mutual Water Company |
375 | 2 | 19.7 mi | |
| Caruthers Comm Serv Dist |
2,613 | 0 | 19.8 mi | |
| Terra Linda Farms |
79 | 0 | 20.8 mi |
Non-community systems in Fresno County (237: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Fresno County, nearest to San Joaquin 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.
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.