Water quality for ZIP code 95203
ZIP 95203 covers Stockton in San Joaquin County, California, one of 30 ZIP codes in the county. 306 active public water systems serve the county; 69 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 Joaquin County
92 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| City of Stockton Stockton |
192,702 | 2 | 3.3 mi | |
| San Joaquin County Lincoln Village |
5,841 | 0 | 3.9 mi | |
| Sahara Mobile Court |
300 | 0 | 4.0 mi | |
| San Juan Vista |
201 | 0 | 4.2 mi | |
| Big Wheel Mobile Home Park |
120 | 0 | 5.0 mi | |
| Fremont One |
39 | 1 | 5.0 mi | |
| San Joaquin County Colonial Heights |
1,841 | 0 | 5.2 mi | |
| Mobile Villas Trailer Park |
130 | 0 | 5.2 mi | |
| Country Squire Mobile Estates & Water SY |
131 | 1 | 5.5 mi | |
| V & P Trailer Court Water System |
35 | 2 | 5.5 mi | |
| Caribou Mobile Park PWS |
180 | 0 | 5.6 mi | |
| A1 Winstons Mobile Home Park |
75 | 2 | 5.6 mi | |
| Walnut Acres |
106 | 0 | 5.8 mi | |
| Stockton Verde Mobile Home Park |
703 | 0 | 5.8 mi | |
| EL Rio Mobile Home Park |
60 | 1 | 5.9 mi | |
| Mapache Trailer Park |
275 | 0 | 6.2 mi | |
| Martinez Apartments |
26 | 2 | 6.2 mi | |
| Rancho San Joaquin Water Sys |
172 | 0 | 6.4 mi | |
| Bel Air Mobile Estate |
325 | 0 | 6.6 mi | |
| Gayla Manor PWS |
178 | 0 | 6.8 mi | |
| Haven Acres River Club INC |
100 | 0 | 6.9 mi | |
| Century Mobile Home Park |
50 | 1 | 6.9 mi | |
| Shaded Terrace PWS |
238 | 0 | 7.0 mi | |
| Sunny Road Water System |
34 | 1 | 7.0 mi | |
| Stockton East Water District |
0 | 0 | 7.0 mi |
Non-community systems in San Joaquin County (213: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to San Joaquin 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.
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.