Water quality for ZIP code 85620
ZIP 85620 covers Naco in Cochise County, Arizona, one of 21 ZIP codes in the county. 105 active public water systems serve the county; 86 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 Cochise County
52 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Naco Estates Naco |
75 | 5 | 0.7 mi | |
| Naco Water CO Bisbee Bisbee |
138 | 1 | 3.8 mi | |
| Arizona Water CO Bisbee Bisbee |
8,590 | 2 | 5.8 mi | |
| Palominas Water Sewer CO Palominas |
27 | 0 | 11.1 mi | |
| Twin Buttes Rv, LLC Douglas |
79 | 4 | 12.1 mi | |
| Southern Sunrise WC Miracle Valley Bisbee |
620 | 0 | 16.5 mi | |
| Bella Vista Water South Sierra Vista |
2,178 | 1 | 18.3 mi | |
| Southern Sunrise WC Cochise Horseshoe Sierra Vista |
1,588 | 0 | 18.7 mi | |
| East Slope Water Company Sierra Vista |
2,012 | 0 | 20.7 mi | |
| Southland Utilities Golden Acres Sierra Vista |
1,635 | 1 | 20.9 mi | |
| Monte Vista Water Company Douglas |
150 | 8 | 21.6 mi | |
| Pueblo del Sol Water Company Sierra Vista |
12,804 | 4 | 22.1 mi | |
| Bisbee Douglas Intl Airport Bisbee |
1,700 | 3 | 22.1 mi | |
| Sierra Vista MH Village Sierra Vista |
328 | 3 | 22.1 mi | |
| East Slope Water West Sierra Vista |
655 | 0 | 22.4 mi | |
| Cloud Nine Water Company Sierra Vista |
143 | 1 | 23.2 mi | |
| Arizona Water CO Sierra Vista Sierra Vista |
9,233 | 1 | 23.5 mi | |
| LA Costa Water Users Assoc Douglas |
30 | 2 | 23.7 mi | |
| Douglas City of Douglas |
16,656 | 2 | 23.9 mi | |
| Bella Vista City Water System Sierra Vista |
20,045 | 1 | 24.0 mi | |
| McNeal Water Company Mcneal |
66 | 6 | 24.1 mi | |
| Cochise College Park Water Assoc Douglas |
83 | 0 | 24.7 mi | |
| Ntm Aviation Mcneal |
47 | 4 | 24.8 mi | |
| Tombstone City of Tombstone |
1,545 | 4 | 27.2 mi | |
| CS Holiday Water Company Tombstone |
395 | 3 | 27.8 mi |
Non-community systems in Cochise County (52: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Cochise 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.