Water Quality: San Tan Valley, AZ
4 water systems • 98,772 people served
Multiple Health ViolationsWater Quality Summary
San Tan Valley is served by 4 public water systems with a combined service population of 98,772 people, and has 301 EPA Safe Drinking Water Act violations on record. Critically, 16 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. San Tan Valley's violation count is 21% below the national average for Arizona. Contaminants associated with violations include Chlorine Dioxide, Selenium.
Contaminants Found
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Hair loss, nail brittleness, and nervous system damage at elevated concentrations.
Common source: Natural geological deposits, mining discharges, oil refinery waste
EPA limit: 0.05 mg/L (50 ppb)
Water Systems Serving San Tan Valley
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| EPCOR - SAN TAN | AZ0411128 | Groundwater | 87,435 | 72 |
| EPCOR - SAN TAN ANTHEM | AZ0411136 | Groundwater | 10,362 | 34 |
| SUN VALLEY FARMS UNIT VI | AZ0411111 | Groundwater | 600 | 70 |
| SKYLINE RESORT RV PARK | AZ0411556 | Groundwater | 375 | 125 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Arizona
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.