Water quality for ZIP code 85718
ZIP 85718 covers Catalina Foothills, Tucson, Casas Adobes, and Oro Valley in Pima County, Arizona, one of 51 ZIP codes in the county. 193 active public water systems serve the county; 127 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 Pima County
141 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Vista del Norte MHP Tucson |
554 | 0 | 4.0 mi | |
| Mission Palms Apartments Tucson |
720 | 1 | 4.1 mi | |
| Casitas de Castilian Tucson |
167 | 5 | 4.1 mi | |
| Campbell Estates MHP Tucson |
450 | 1 | 4.2 mi | |
| Samalayuca Improvement Assoc Tucson |
150 | 1 | 4.2 mi | |
| Rio Vista Mobile Home Park Tucson |
217 | 0 | 4.3 mi | |
| Winterhaven Water Development Tucson |
685 | 0 | 4.6 mi | |
| Cammies Foothills Vista MHC Tucson |
62 | 1 | 4.6 mi | |
| Mesaland Water Company Tucson |
294 | 5 | 5.2 mi | |
| Metropolitan Dwid Tucson |
45,570 | 4 | 5.4 mi | |
| Silver Cholla LLC Tucson |
168 | 0 | 6.0 mi | |
| North la Cholla MHP Tucson |
150 | 0 | 6.0 mi | |
| Crescent Manor MHP Tucson |
200 | 1 | 6.0 mi | |
| Crossroads Park MHP Tucson |
100 | 1 | 6.0 mi | |
| Far Horizons MHP Tucson |
258 | 0 | 6.1 mi | |
| Flowing Wells Irrigation District Tucson |
16,000 | 6 | 6.2 mi | |
| Bella Capri MHP Tucson |
342 | 2 | 6.5 mi | |
| Diamond Grove Mobile Home Estates Tucson |
385 | 1 | 6.6 mi | |
| Desert Shores RV MHP Tucson |
220 | 2 | 6.6 mi | |
| Metropolitan Dwid Hub Tucson |
4,252 | 1 | 6.9 mi | |
| Oro Valley Water Utility Oro Valley |
42,316 | 0 | 7.0 mi | |
| Catalina Village Tucson |
107 | 3 | 7.2 mi | |
| Far Horizons East MHP Tucson |
870 | 0 | 8.7 mi | |
| Siete Casas Joint Venture Tucson |
25 | 2 | 8.7 mi | |
| Carolanne Drive HOA Tucson |
72 | 2 | 9.0 mi |
Non-community systems in Pima County (51: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Pima 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.