SAN TAN VALLEY, AZ · Pinal County
EPCOR - SAN TAN Water System
Consumer Confidence Report status
EPCOR - SAN TAN must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for EPCOR - SAN TAN.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Arizona’s official records. Always confirm current status with Arizona before making decisions based on this information.
System facts
- System ID (PWSID)
- AZ0411128
- System type
- Community Water System
- Population served
- 87,435
- Service connections
- 26,986
- Ownership
- privately owned
- Water source
- groundwater (wells)
EPCOR - SAN TAN is among the 15 largest community water systems in Arizona, serving 87,435 people from groundwater.
As of August 1, 2026, its federal record holds 5 entries between 2000 and 2006, all of which EPA lists as closed. Nothing has been added since 2006.
All 5 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals and volatile organic chemicals.
Violation history
Monitoring, Regular
—1,1,1-Trichloroethane
January 1, 2006 – December 31, 2006
ResolvedMonitoring, Regular
—Glyphosate
January 1, 2006 – December 31, 2008
ResolvedMonitoring, Regular
—Glyphosate
January 1, 2006 – December 31, 2008
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) adipate
January 1, 2000 – December 31, 2008
ResolvedMonitoring, Regular
—Diquat
January 1, 2000 – December 31, 2008
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2006 – December 31, 2006 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2006 – December 31, 2008 | Monitoring, Regular | Glyphosate | — | Resolved |
| January 1, 2006 – December 31, 2008 | Monitoring, Regular | Glyphosate | — | Resolved |
| January 1, 2000 – December 31, 2008 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| January 1, 2000 – December 31, 2008 | Monitoring, Regular | Diquat | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- January 30, 2025State Violation/Reminder Notice224 linked violations
- November 15, 2017State Violation/Reminder Notice211 linked violations
- April 26, 2017State no longer subject to Rule199 linked violations
Common questions
Is EPCOR - SAN TAN required to publish a Consumer Confidence Report?
- Yes. EPCOR - SAN TAN is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is EPCOR - SAN TAN’s next Consumer Confidence Report due?
- EPCOR - SAN TAN’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does EPCOR - SAN TAN have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for EPCOR - SAN TAN.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
HOSKIN, JULIE
602-722-4100
SAN TAN VALLEY, AZ 85143