Santa Cruz County Water Quality
Arizona
According to EPA SDWIS, Santa Cruz County, Arizona hosts 9 community water systems covering about 23,406 people. The same extract lists 21 health-based violation records across 8 systems. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Santa Cruz County, Arizona hosts 9 EPA-regulated community water systems delivering drinking water to approximately 23,406 people. Each system is catalogued in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which mandates monitoring for dozens of regulated contaminants, public notification when standards are exceeded, and the issuance of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 21 violation records across these active community systems, with 8 systems carrying at least one record. The extract excludes monitoring and reporting violations. The county contains 5 incorporated places where these systems deliver service.
A historical health-based registry row does not establish water delivered today or describe current compliance. For current conditions, request the utility's most recent Consumer Confidence Report or contact the Arizona drinking water program. Figures shown here reflect only the health-based subset fetched from federal EPA SDWIS.
What water systems serve Santa Cruz County?
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| NOGALES CITY OF | 22,000 | 5 | Health |
| PATAGONIA WATER DEPARTMENT | 819 | 0 | Clean |
| THE GRAND ACRES | 153 | 1 | Health |
| KINO RANCH 2 | 109 | 2 | Health |
| AVALON GARDENS WATER SYSTEM | 100 | 2 | Health |
| MOUNTAIN VIEW RV RANCH | 100 | 2 | Health |
| TRUJILLO TRAIL DWID | 75 | 2 | Health |
| CASAS ARROYO ASSOCIATION INC | 27 | 4 | Health |
| RED ROCK ACRES HOA | 23 | 3 | Health |
Cities in Santa Cruz County
How does Santa Cruz County compare in Arizona?
Of the 15 Arizona counties with at least one community water system on file, Santa Cruz County ranks #13 by number of systems (9).
Either side of it: Yuma County (23), La Paz County (12), Graham County (8), Greenlee County (4)
What are Santa Cruz County's health-based records for?
Santa Cruz County's health-based violation records carry 5 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results, and a historical record does not establish present water quality.
| Contaminant | Records | Systems |
|---|---|---|
| Lead and Copper Rule Revisions | 10 | 6 |
| Revised Total Coliform Rule | 6 | 4 |
| Groundwater Rule | 3 | 2 |
| Asbestos | 1 | 1 |
| Lead and Copper Rule | 1 | 1 |
About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
Figures here are the current EPA SDWIS extract joined to the 9 community water systems whose service area falls in Santa Cruz County, ranked against the 15 Arizona counties with at least one system on file. Data current as of 2026-08-25. Editorial standards, methodology, report an error.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
Read our methodology - how this data is sourced, computed, and verified.