Water quality for ZIP code 85204
ZIP 85204 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 |
|---|---|---|---|---|
| Gilbert, Town of Gilbert |
247,600 | 9 | 6.4 mi | |
| Sontel Water Coop Gilbert |
80 | 4 | 6.8 mi | |
| Tempe City of Tempe |
165,000 | 0 | 8.4 mi | |
| Chandler City of Chandler |
247,328 | 4 | 8.7 mi | |
| Greenfield Ranchettes Chandler |
53 | 6 | 11.3 mi | |
| Gilbert Rigg Well Coop Chandler |
95 | 1 | 11.8 mi | |
| Peekaboo Water Coop Chandler |
100 | 1 | 12.6 mi | |
| Pima Utilities Chandler |
20,000 | 7 | 13.3 mi | |
| Epcor Paradise Valley/scottsdale Paradise Valley |
14,107 | 2 | 13.5 mi | |
| Chandler Heights Citrus Irrigation Dist Chandler |
2,620 | 3 | 13.9 mi | |
| Berneil Water Company Paradise Valley |
1,388 | 1 | 14.4 mi | |
| Queen Creek Town of Queen Creek |
95,502 | 1 | 14.5 mi | |
| Epcor Chaparral City Fountain Hills |
26,026 | 2 | 14.6 mi | |
| Scottsdale City of Scottsdale |
241,361 | 2 | 20.7 mi | |
| Michigan Trailer Park Phoenix |
400 | 2 | 20.7 mi | |
| Phoenix City of Phoenix |
1,695,000 | 2 | 21.2 mi | |
| Epcor Rio Verde Rio Verde |
5,330 | 2 | 23.9 mi | |
| 67 Ave Property Owners Association Phoenix |
40 | 5 | 24.4 mi | |
| GW -Bwc, Inc. Nswc Scottsdale |
301 | 1 | 25.1 mi | |
| Orangewood Mobile Home Park Phoenix |
500 | 1 | 26.3 mi | |
| Glendale City of Glendale |
234,766 | 3 | 27.3 mi | |
| Tolleson City of Tolleson |
9,300 | 4 | 27.3 mi | |
| Adjc Adobe Mountain School Phoenix |
680 | 3 | 28.7 mi | |
| Carefree Water Company Carefree |
3,588 | 3 | 30.3 mi | |
| Avondale City of Avondale |
96,130 | 2 | 30.6 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.