Water quality for ZIP code 85203
ZIP 85203 covers Mesa in Maricopa County, Arizona, one of 135 ZIP codes in the county. 217 active public water systems serve the county; 139 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 Maricopa County
99 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Tempe City of Tempe |
165,000 | 0 | 8.6 mi | |
| Sontel Water Coop Gilbert |
80 | 4 | 10.2 mi | |
| Gilbert, Town of Gilbert |
247,600 | 9 | 10.2 mi | |
| Epcor Paradise Valley/scottsdale Paradise Valley |
14,107 | 2 | 10.5 mi | |
| Berneil Water Company Paradise Valley |
1,388 | 1 | 10.9 mi | |
| Epcor Chaparral City Fountain Hills |
26,026 | 2 | 11.2 mi | |
| Chandler City of Chandler |
247,328 | 4 | 12.0 mi | |
| Greenfield Ranchettes Chandler |
53 | 6 | 15.2 mi | |
| Gilbert Rigg Well Coop Chandler |
95 | 1 | 15.6 mi | |
| Peekaboo Water Coop Chandler |
100 | 1 | 16.5 mi | |
| Pima Utilities Chandler |
20,000 | 7 | 16.6 mi | |
| Scottsdale City of Scottsdale |
241,361 | 2 | 16.8 mi | |
| Chandler Heights Citrus Irrigation Dist Chandler |
2,620 | 3 | 17.7 mi | |
| Queen Creek Town of Queen Creek |
95,502 | 1 | 18.0 mi | |
| Phoenix City of Phoenix |
1,695,000 | 2 | 18.4 mi | |
| Michigan Trailer Park Phoenix |
400 | 2 | 19.0 mi | |
| Epcor Rio Verde Rio Verde |
5,330 | 2 | 20.6 mi | |
| GW -Bwc, Inc. Nswc Scottsdale |
301 | 1 | 21.4 mi | |
| Orangewood Mobile Home Park Phoenix |
500 | 1 | 23.1 mi | |
| 67 Ave Property Owners Association Phoenix |
40 | 5 | 23.6 mi | |
| Glendale City of Glendale |
234,766 | 3 | 24.9 mi | |
| Adjc Adobe Mountain School Phoenix |
680 | 3 | 25.3 mi | |
| Tolleson City of Tolleson |
9,300 | 4 | 26.2 mi | |
| Carefree Water Company Carefree |
3,588 | 3 | 26.4 mi | |
| Cave Creek Water Cave Creek |
5,895 | 0 | 27.7 mi |
Non-community systems in Maricopa County (117: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Maricopa 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.