Water quality for ZIP code 85257
ZIP 85257 covers Scottsdale and 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 |
|---|---|---|---|---|
| Epcor Paradise Valley/scottsdale Paradise Valley |
14,107 | 2 | 5.3 mi | |
| Berneil Water Company Paradise Valley |
1,388 | 1 | 7.1 mi | |
| Mesa City of Mesa |
466,000 | 3 | 12.3 mi | |
| Michigan Trailer Park Phoenix |
400 | 2 | 12.4 mi | |
| Phoenix City of Phoenix |
1,695,000 | 2 | 12.4 mi | |
| Chandler City of Chandler |
247,328 | 4 | 13.0 mi | |
| Epcor Chaparral City Fountain Hills |
26,026 | 2 | 14.0 mi | |
| Gilbert, Town of Gilbert |
247,600 | 9 | 14.4 mi | |
| Scottsdale City of Scottsdale |
241,361 | 2 | 15.5 mi | |
| Sontel Water Coop Gilbert |
80 | 4 | 15.5 mi | |
| Pima Utilities Chandler |
20,000 | 7 | 17.1 mi | |
| 67 Ave Property Owners Association Phoenix |
40 | 5 | 17.2 mi | |
| Orangewood Mobile Home Park Phoenix |
500 | 1 | 17.8 mi | |
| Gilbert Rigg Well Coop Chandler |
95 | 1 | 18.1 mi | |
| Glendale City of Glendale |
234,766 | 3 | 18.6 mi | |
| Greenfield Ranchettes Chandler |
53 | 6 | 18.6 mi | |
| Peekaboo Water Coop Chandler |
100 | 1 | 19.5 mi | |
| Tolleson City of Tolleson |
9,300 | 4 | 19.7 mi | |
| Adjc Adobe Mountain School Phoenix |
680 | 3 | 20.4 mi | |
| Chandler Heights Citrus Irrigation Dist Chandler |
2,620 | 3 | 21.7 mi | |
| GW -Bwc, Inc. Nswc Scottsdale |
301 | 1 | 22.2 mi | |
| Epcor Rio Verde Rio Verde |
5,330 | 2 | 22.9 mi | |
| Avondale City of Avondale |
96,130 | 2 | 22.9 mi | |
| Queen Creek Town of Queen Creek |
95,502 | 1 | 23.1 mi | |
| Peoria City of Peoria |
187,676 | 4 | 23.6 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.