Water quality for ZIP code 85643
ZIP 85643 covers Willcox in Graham County, Arizona, one of 10 ZIP codes in the county. 16 active public water systems serve the county; 13 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Graham County
6 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Usdj Fbp Fed Corr Inst Safford Safford |
949 | 5 | 25.6 mi | |
| Ash Creek Water Company Pima |
310 | 1 | 31.0 mi | |
| Safford City of Safford |
20,600 | 5 | 31.9 mi | |
| Graham County Utilities Pima Pima |
3,899 | 3 | 34.5 mi | |
| Eden Water Company INC Safford |
400 | 6 | 37.6 mi | |
| Graham County Utilities-Fort Thomas Pima |
452 | 2 | 43.4 mi |
Non-community systems in Graham County (9: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Naturesweet USA Fort Grant |
200 | 2 | 0 | |
|
Bonita Public School Willcox |
128 | 6 | 3 | |
|
AZ State Pks Roper Lake Safford |
110 | 0 | 0 | |
|
MT Graham Cabin Owners Assoc Safford |
140 | 1 | 0 | |
|
Usfs Cnf Treasure Park Safford |
50 | 2 | 0 | |
|
Freeport McMoran Safford Unknown |
1,594 | 0 | 0 | |
|
Usfs-Cnf-Arcadia Mount Graham |
67 | 1 | 0 | |
|
Usfs-Cnf-Riggs Lake Mount Graham |
65 | 0 | 0 | |
|
Usfs Cnf Columbine Mount Graham |
50 | 1 | 0 |
About this data
Water systems are matched to Graham 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.