San Tan Valley Water Quality
Arizona
According to EPA SDWIS, San Tan Valley, Arizona is served by 4 community water systems covering about 98,772 people. The same extract lists 17 health-based violation records, most recently coded 0700 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in San Tan Valley, Arizona is delivered through 4 EPA-regulated community water systems serving an estimated 98,772 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 17 violation records across the 4 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 2 distinct EPA contaminant codes: Groundwater Rule, Nitrate.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Arizona drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| EPCOR - SAN TAN | 87,435 | 2 | Health |
| EPCOR - SAN TAN ANTHEM | 10,362 | 0 | Clean |
| SUN VALLEY FARMS UNIT VI | 600 | 9 | Health |
| SKYLINE RESORT RV PARK | 375 | 6 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| SKYLINE RESORT RV PARK | Groundwater Rule | 2024-10-11 |
| SKYLINE RESORT RV PARK | Groundwater Rule | 2024-10-11 |
| SUN VALLEY FARMS UNIT VI | Groundwater Rule | 2020-11-25 |
| SUN VALLEY FARMS UNIT VI | Groundwater Rule | 2020-11-25 |
| SKYLINE RESORT RV PARK | Nitrate | 2020-01-01 |
| SKYLINE RESORT RV PARK | Nitrate | 2019-01-01 |
| SUN VALLEY FARMS UNIT VI | Nitrate | 2018-04-01 |
| SKYLINE RESORT RV PARK | Nitrate | 2018-01-01 |
| SKYLINE RESORT RV PARK | Nitrate | 2018-01-01 |
| SUN VALLEY FARMS UNIT VI | Nitrate | 2018-01-01 |
| SUN VALLEY FARMS UNIT VI | Nitrate | 2017-10-01 |
| SUN VALLEY FARMS UNIT VI | Nitrate | 2017-07-01 |
| SUN VALLEY FARMS UNIT VI | Nitrate | 2017-04-01 |
| EPCOR - SAN TAN | Nitrate | 2017-01-01 |
| SUN VALLEY FARMS UNIT VI | Nitrate | 2016-10-01 |
| EPCOR - SAN TAN | Nitrate | 2016-01-01 |
| SUN VALLEY FARMS UNIT VI | Nitrate | 2015-04-01 |
What are San Tan Valley's health-based records for?
San Tan Valley's health-based violation records carry 2 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.
| Contaminant | Records | Systems |
|---|---|---|
| Nitrate | 13 | 3 |
| Groundwater Rule | 4 | 2 |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in San Tan Valley, Arizona? ▼
How many water violations does San Tan Valley have in this EPA extract? ▼
What contaminants were found in San Tan Valley water? ▼
How many water systems serve San Tan Valley? ▼
Where does San Tan Valley get its drinking water? ▼
How does San Tan Valley compare in Arizona?
Of the 191 Arizona places with at least one community water system on file, San Tan Valley ranks #48 by number of systems (4).
Either side of it: Peoria (4), Pine (4), Second Mesa (4), Somerton (4)
About This Data
Figures here are the current EPA SDWIS extract joined to the 4 community water systems whose service area lists San Tan Valley, ranked against the 191 Arizona places with at least one system on file. Data current as of 2026-08-25.
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.
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.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.