Water quality for ZIP code 85637
ZIP 85637 covers Sonoita in Santa Cruz County, Arizona, one of 7 ZIP codes in the county. 37 active public water systems serve the county; 32 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Santa Cruz County
16 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Casas Arroyo Association INC Sonoita |
27 | 4 | 4.1 mi | |
| Sonoita Valley (south) Water Company Sonoita |
172 | 4 | 5.4 mi | |
| Red Rock Acres HOA Patagonia |
23 | 2 | 12.4 mi | |
| Patagonia Water Department Patagonia |
819 | 1 | 12.7 mi | |
| Baca Float Water Company Tubac |
1,162 | 1 | 21.5 mi | |
| Mountain View RV Ranch Green Valley |
100 | 2 | 21.9 mi | |
| Liberty Water Rio Rico Rio Rico |
17,960 | 3 | 22.3 mi | |
| Epcor Tubac Tubac |
2,076 | 0 | 22.9 mi | |
| Avalon Gardens Water System Tubac |
100 | 2 | 22.9 mi | |
| Trujillo Trail Dwid Tubac |
78 | 3 | 25.0 mi | |
| Kino Ranch 2 Nogales |
173 | 4 | 25.9 mi | |
| Valle Verde Water Company East Nogales |
2,397 | 4 | 27.1 mi | |
| The Grand Acres Nogales |
153 | 4 | 27.7 mi | |
| Town & Country Preston Nogales |
430 | 6 | 28.3 mi | |
| Nogales City of Nogales |
22,000 | 7 | 28.5 mi | |
| CS Santa Cruz Water CO Fort Huachuca |
82 | 5 | — |
Non-community systems in Santa Cruz County (20: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Santa Cruz County Fairgrounds Sonoita |
297 | 3 | 1 | |
|
Sonoita Springs Water Company Sonoita |
30 | 3 | 2 | |
|
Sonoita Mercantile Water System Sonoita |
125 | 3 | 0 | |
|
Adot Border Patrol Sonoita |
100 | 5 | 0 | |
|
Elgin School Elgin |
150 | 4 | 0 | |
|
Patagonia Sonoita Creek Preserve Patagonia |
25 | 1 | 0 | |
|
Patagonia RV Park Patagonia |
28 | 1 | 0 | |
|
AZ State Pks Patagonia Lake Patagonia |
564 | 0 | 0 | |
|
Parcel 1 Water Amado |
100 | 1 | 1 | |
|
Smithsonian Inst II Amado |
35 | 2 | 1 | |
|
DE Anza Trail RV Tubac |
200 | 2 | 0 | |
|
Crisantes Greenhouse Water System Amado |
60 | 6 | 1 | |
|
Wisdom Cafe Tumacacori |
100 | 3 | 0 | |
|
Tumacacori National Historic Park Nogales |
170 | 2 | 0 | |
|
Old Tumacacori Bar Tumacacori |
25 | 2 | 0 | |
|
Valle Verde Water Company West Nogales |
74 | 3 | 0 | |
|
Gen Properties LLC Nogales |
100 | 2 | 0 | |
|
Ac's Truck Stop Nogales |
110 | 1 | 0 | |
|
Usfs-Cnf Nogales Admin Nogales |
25 | 0 | 0 | |
|
Usfs Cnf Bog Springs Madera Canyon |
35 | 0 | 0 |
About this data
Water systems are matched to Santa Cruz 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.