Water quality for ZIP code 85371
ZIP 85371 covers Poston in La Paz County, Arizona, one of 8 ZIP codes in the county. 87 active public water systems serve the county; 57 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in La Paz County
21 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Quartzsite Town of Quartzsite |
2,761 | 2 | 14.4 mi | |
| Shady Spot RV Park Quartzsite |
44 | 1 | 14.4 mi | |
| Q Mountain Vista MHP Quartzsite |
440 | 0 | 14.6 mi | |
| CS Q Mountain Water Company Quartzsite |
1,224 | 1 | 16.5 mi | |
| Ehrenberg Improvement District Ehrenberg |
989 | 1 | 16.6 mi | |
| Just for Fun RV Park Bouse |
212 | 1 | 22.3 mi | |
| Bouse Dwid Bouse |
284 | 7 | 22.5 mi | |
| Epcor Lakeside Parker |
1,775 | 0 | 25.7 mi | |
| Cienega Water Company INC Parker |
108 | 8 | 26.4 mi | |
| Epcor Moovalya Keys Parker |
1,298 | 1 | 27.0 mi | |
| Epcor Marina Village Parker |
528 | 1 | 30.0 mi | |
| Epcor Rio Lindo Parker |
79 | 0 | 31.0 mi | |
| Epcor Holiday Harbor Parker |
559 | 1 | 33.5 mi | |
| Epcor Parker Dam Parker |
429 | 1 | 34.2 mi | |
| Cibola Water Improvement District Cibola |
197 | 8 | 34.4 mi | |
| Desert Sky Dwid Salome |
72 | 4 | 35.1 mi | |
| Hillcrest Water Company Parker Dam |
459 | 1 | 35.7 mi | |
| Vicksburg Farm Vicksburg |
220 | 2 | 37.0 mi | |
| Salome Water Company Salome |
289 | 4 | 43.8 mi | |
| CS Harrisburg Utility Company Salome |
1,759 | 4 | 44.3 mi | |
| Wenden Dwid Wenden |
360 | 3 | 47.9 mi |
Non-community systems in La Paz County (65: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to La Paz 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 or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
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 Arizona 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.