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EPCOR - SAN TAN

Arizona — Community Water System — PWSID: AZ0411128

System Information

PWSIDAZ0411128
System NameEPCOR - SAN TAN
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedMar 31, 2000
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CitySAN TAN VALLEY
ZIP Code85143
Address—
OrganizationHOSKIN, JULIE
Phone602-722-4100

Population & Service

Population Served87,435
Service Connections26,986

Drinking Water Violations (344)

This water system has 344 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Dec 1, 2024 Dec 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Dec 1, 2024 Dec 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2024 Sep 30, 2024 Chlorine MR No No — 4.0 mg/L — Resolved Sep 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2024 Sep 30, 2024 Chlorine MR No No — 4.0 mg/L — Resolved Sep 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2024 Apr 30, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Apr 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2024 Apr 30, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Apr 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2024 Dec 31, 2024 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2024 Volatile Organic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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