County · Arizona
Santa Cruz County, Arizona: drinking water records
This overview covers 7 ZIP codes and 16 community water systems in Santa Cruz County. It also stands in for 1 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Nogales City of AZ0412004 | 22,000 | 300 | 0 | 3 | 0 ppb |
| Liberty Water Rio Rico AZ0412011 | 17,960 | 360 | 7 | 0 | 0 ppb |
| Valle Verde Water Company - East AZ0412009 | 2,331 | 0 | 0 | 1 | 0 ppb |
| Patagonia Water Department AZ0412006 | 819 | 60 | 0 | 0 | 0 ppb |
| Town & Country - Preston AZ0412311 | 430 | 0 | 0 | 2 | 0 ppb |
| Sonoita Valley (South) Water Company AZ0412005 | 169 | 0 | 0 | 2 | 8 ppb |
| The Grand Acres AZ0412305 | 153 | 0 | 0 | 1 | 0 ppb |
| Kino Ranch 2 AZ0412015 | 109 | 0 | 0 | 2 | 0 ppb |
| Avalon Gardens Water System AZ0412044 | 100 | 0 | 0 | 3 | 0 ppb |
| Mountain View RV Ranch AZ0412306 | 100 | 0 | 0 | 2 | 3 ppb |
| Trujillo Trail Dwid AZ0412040 | 75 | 0 | 0 | 2 | 1.3 ppb |
| Casas Arroyo Association INC AZ0412020 | 27 | 0 | 0 | 2 | 1 ppb |
| Red Rock Acres HOA AZ0412321 | 23 | 0 | 0 | 1 | 0 ppb |
| Epcor - Tubac AZ0412001 | 2,076 | 0 | 0 | 0 | 0 ppb |
| Baca Float Water Company AZ0412037 | 1,090 | 0 | 0 | 0 | 0 ppb |
| Sonoita Valley (North) Water Company AZ0412308 | 49 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Santa Cruz County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 85611.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.