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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDAZ0411128
PWS NameEPCOR - SAN TAN
PWS TypeCommunity water system
Owner TypePrivate
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served87435
County ServedPinal

Note

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

PWS Violation

Violations

Violation Category CodeViolation Type DescriptionRule NameContaminant NameViolation IDCompliance Status DescriptionCompliance Period Begin DateCompliance Period End DateIs Health Based Ind
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine6489Returned to Compliance01-DEC-202431-DEC-2024No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine6488Returned to Compliance01-SEP-202430-SEP-2024No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine6487Returned to Compliance01-APR-202430-APR-2024No
MRMonitoring, RegularVolatile Organic ChemicalsToluene6511Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsBenzene6510Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsCHLOROBENZENE6509Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsTetrachloroethylene6508Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,1,2-Trichloroethane6507Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsTrichloroethylene6506Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloropropane6505Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularNitrate RuleNitrate6514Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,1,1-Trichloroethane6503Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloroethane6502Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicalstrans-1,2-Dichloroethylene6501Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,1-Dichloroethylene6500Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicalsp-Dichlorobenzene6499Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicalso-Dichlorobenzene6498Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsDICHLOROMETHANE6497Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsXylenes, Total6496Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicalscis-1,2-Dichloroethylene6495Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,2,4-Trichlorobenzene6494Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularNitrate RuleNitrate6492Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularNitrate RuleNitrate6515Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsEthylbenzene6512Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsStyrene6513Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularNitrate RuleNitrate6493Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsCarbon tetrachloride6504Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine6458Returned to Compliance01-APR-202230-JUN-2022No
MRMonitoring, RegularNitrate RuleNitrate6463Returned to Compliance01-APR-202230-JUN-2022No
MRMonitoring, RegularNitrate RuleNitrate6462Returned to Compliance01-APR-202230-JUN-2022No
MRMonitoring, RegularNitrate RuleNitrate6461Returned to Compliance01-APR-202230-JUN-2022No
MRMonitoring, Source Water (GWR)Ground Water RuleE. COLI6457Returned to Compliance07-OCT-2020 - No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine6456Returned to Compliance01-OCT-201931-DEC-2019No
MRMonitoring, RegularNitrate RuleNitrate6449Returned to Compliance01-APR-201930-JUN-2019No
MRMonitoring, RegularNitrate RuleNitrate6451Returned to Compliance01-APR-201930-JUN-2019No
MRMonitoring, RegularNitrate RuleNitrate6450Returned to Compliance01-APR-201930-JUN-2019No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine6444Returned to Compliance01-JAN-201931-MAR-2019No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM6447Returned to Compliance01-DEC-201828-FEB-2019No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)6448Returned to Compliance01-DEC-201828-FEB-2019No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM6442Returned to Compliance01-SEP-201830-NOV-2018No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)6443Returned to Compliance01-SEP-201830-NOV-2018No
MRMonitoring, RegularNitrate RuleNitrate6439Returned to Compliance01-JUL-201830-SEP-2018No
MRMonitoring, RegularNitrate RuleNitrate6440Returned to Compliance01-JUL-201830-SEP-2018No
MRMonitoring, RegularNitrate RuleNitrate6441Returned to Compliance01-JUL-201830-SEP-2018No
MRMonitoring, RegularNitrate RuleNitrate6435Returned to Compliance01-JAN-201831-MAR-2018No
MRMonitoring, RegularNitrate RuleNitrate6436Returned to Compliance01-JAN-201831-MAR-2018No
MRMonitoring, RegularNitrate RuleNitrate6437Returned to Compliance01-JAN-201831-MAR-2018No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM6433Returned to Compliance01-JUN-201731-AUG-2017No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)6434Returned to Compliance01-JUN-201731-AUG-2017No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine6432Returned to Compliance01-APR-201730-JUN-2017No
  • 1 - 50 of 267

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
35466494SIFState Public Notification received30-SEP-2025State -
35466495SIFState Public Notification received30-SEP-2025State -
35466513SIFState Public Notification received30-SEP-2025State -
35466512SIFState Public Notification received30-SEP-2025State -
35466511SIFState Public Notification received30-SEP-2025State -
35466510SIFState Public Notification received30-SEP-2025State -
35466496SIFState Public Notification received30-SEP-2025State -
35466497SIFState Public Notification received30-SEP-2025State -
35466498SIFState Public Notification received30-SEP-2025State -
35466499SIFState Public Notification received30-SEP-2025State -
35466500SIFState Public Notification received30-SEP-2025State -
35466501SIFState Public Notification received30-SEP-2025State -
35466502SIFState Public Notification received30-SEP-2025State -
35466503SIFState Public Notification received30-SEP-2025State -
35466504SIFState Public Notification received30-SEP-2025State -
35466505SIFState Public Notification received30-SEP-2025State -
35466506SIFState Public Notification received30-SEP-2025State -
35466507SIFState Public Notification received30-SEP-2025State -
35466508SIFState Public Notification received30-SEP-2025State -
35466509SIFState Public Notification received30-SEP-2025State -
35416493SOXState Compliance achieved06-FEB-2025StateSystem subsequently submitted sample on 2.6.25 nra 2.7.25
35426514SOXState Compliance achieved06-FEB-2025StateSystem subsequently submitted sample on 2.6.25 nra 2.7.25
35436492SOXState Compliance achieved05-FEB-2025StateSystem subsequently submitted sample on 2.5.25 nra 2.13.25
35446515SOXState Compliance achieved05-FEB-2025StateSystem subsequently submitted sample on 2.5.25 nra 2.13.25
35296489SOXState Compliance achieved29-JAN-2025State -
35226488SOXState Compliance achieved04-DEC-2024State -
35196487SOXState Compliance achieved05-AUG-2024State -
35026458SOXState Compliance achieved29-JUL-2022StateData received on 07/22/2022 - DB18 07/29/2022
35096463SOXState Compliance achieved29-JUL-2022StatePWS submitted data late on 07/22/2022 -DB18 07/29/2022
35096462SOXState Compliance achieved29-JUL-2022StatePWS submitted data late on 07/22/2022 -DB18 07/29/2022
35096461SOXState Compliance achieved29-JUL-2022StatePWS submitted data late on 07/22/2022 -DB18 07/29/2022
34936457SIEState Public Notification requested24-NOV-2020State -
34896456SOXState Compliance achieved30-JAN-2020StateSystem submitted revised report on 1/30/2020 HML 1/30/2020
34806451SIAState Violation/Reminder Notice31-JUL-2019State -
34756449SIAState Violation/Reminder Notice29-JUL-2019State -
34776450SIAState Violation/Reminder Notice29-JUL-2019State -
34726448SIAState Violation/Reminder Notice19-APR-2019State -
34726447SIAState Violation/Reminder Notice19-APR-2019State -
34696444SIAState Violation/Reminder Notice17-APR-2019State -
34746443SOXState Compliance achieved16-APR-2019StateSystem submitted results late on 4/16/2019 HML 4/19/2019
34746442SOXState Compliance achieved16-APR-2019StateSystem submitted results late on 4/16/2019 HML 4/19/2019
34566440SIAState Violation/Reminder Notice26-OCT-2018State -
34546439SIAState Violation/Reminder Notice26-OCT-2018State -
34586441SIAState Violation/Reminder Notice26-OCT-2018State -
34496436SIAState Violation/Reminder Notice26-APR-2018State -
34476435SIAState Violation/Reminder Notice26-APR-2018State -
34516437SIAState Violation/Reminder Notice26-APR-2018State -
34446433SIAState Violation/Reminder Notice15-NOV-2017State -
34446434SIAState Violation/Reminder Notice15-NOV-2017State -
34436425SOXState Compliance achieved24-AUG-2017StateSystem submitted 3 quarters of nitrate samples below the MCL (1q2017 = 7.5 mg/L, 2q2017 average=9.67, rounds to 9.7, 3q2017 = 8.3 mg/L). System submitted 3rd quarter data on 8/24/2017 HML 8/29/2017.
  • 1 - 50 of 267

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
XWL-55-586189 - EDWARD24313YesWell Ground waterOtherInactive
XWL-55-582088 - OASIS 38321YesWell Ground waterPermanentInactive
XWL-55-582087 - OASIS 28320YesWell Ground waterPermanentInactive
XWL-55-5820868319YesWell Ground waterPermanentInactive
XWL-55-220344 - BELLA VISTA 223482YesWell Ground waterPermanentInactive
XWL-55-582085 - OASIS 119500YesWell Ground waterPermanentInactive
WL-55-621462 - SKYLINE 18322YesWell Ground waterPermanentActive
WL-55-559843 - JR #57924YesWell Ground waterPermanentActive
WL-55-558445 - JR #47552YesWell Ground waterPermanentActive
WL-55-230882 - PROMENADE 126908YesWell Ground waterPermanentActive
WL-55-229147 - BELLA VISTA FARMS25677YesWell Ground waterPermanentActive
WL-55-229336 - PROMENADE #225580YesWell Ground waterPermanentActive
WL-55-626147- SAN TAN 125337YesWell Ground waterPermanentActive
WL 55-627105 - JR#325062YesWell Ground waterPermanentActive
WL-55-212850 - MAGMA 224357YesWell Ground waterPermanentActive
WL-55-603380 - ATTAWAY23678YesWell Ground waterPermanentActive
WL-55-211012 - MORNING SUN 219502YesWell Ground waterPermanentActive
WL-55-209384 - HARDISON19501YesWell Ground waterPermanentActive
WL-55-571198 - WILDHORSE18159YesWell Ground waterPermanentActive
WL-55-594071 - RICKY 318158YesWell Ground waterPermanentActive
WL-55-570372 - RICKY 118156YesWell Ground waterPermanentActive
WL-55-201429 - MORNING SUN 118154YesWell Ground waterPermanentActive
WL-55-598836 - SAN TAN 217248YesWell Ground waterPermanentActive
WL-55-599026 - CIRCLE CROSS17087YesWell Ground waterPermanentActive
DISTRIBUTION SYSTEM15394NoDistribution System/Zone - - Active
EPDS00417090NoSampling Station - - Active
EPDS00718157NoSampling Station - - Active
EPDS00818160NoSampling Station - - Active
EPDS01019499NoSampling Station - - Active
EPDS01124314NoSampling Station - - Active
EPDS01425582NoSampling Station - - Active
EPDS001278NoSampling Station - - Active
XEPDS00310237NoSampling Station - - Inactive
XEPDS00517247NoSampling Station - - Inactive
XEPHIS17787NoSampling Station - - Inactive
XEPDS00618155NoSampling Station - - Inactive
XEPDS00919498NoSampling Station - - Inactive
EPDS01226643NoSampling Station - - Inactive
XEPDS002279NoSampling Station - - Inactive
STORAGE TANK 001 - 500,00018161NoStorage - - Active
STORAGE TANK 002 - 100,00018162NoStorage - - Active
STORAGE TANK 003 - 500,00019489NoStorage - - Active
STORAGE TANK 004 - 1,000,00019490NoStorage - - Active
STORAGE TANK 005 - 500,00019491NoStorage - - Active
STORAGE TANK 006 - 50,00019492NoStorage - - Active
STORAGE TANK 007 - 50,00019493NoStorage - - Active
STORAGE TANK 008 - 1,000,00019494NoStorage - - Active
STORAGE TANK 009 - 1,000,00019495NoStorage - - Active
STORAGE TANK 010 - 1,000,00019496NoStorage - - Active
STORAGE TANK 011 - 50,00019497NoStorage - - Active
  • 1 - 50 of 74

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TP001 - CL216840Gaseous Chlorination, PostDisinfection
TP002 - CL217088Gaseous Chlorination, PreDisinfection
TP002 - CL217088Gaseous Chlorination, PostDisinfection
XTP003 - CL217089Gaseous Chlorination, PreDisinfection
TP004 - CL217091Gaseous Chlorination, PreDisinfection
TP004 - CL217091Gaseous Chlorination, PostDisinfection
XTP005 - CL217249Hypochlorination, PostDisinfection
XTP005 - CL217249Gaseous Chlorination, PreDisinfection
XTP006 - CL219484Gaseous Chlorination, PreDisinfection
XTP006 - CL219484Gaseous Chlorination, PostDisinfection
TP007 - CL219485Gaseous Chlorination, PreDisinfection
TP007 - CL219485Gaseous Chlorination, PostDisinfection
TP008 - CL219486Gaseous Chlorination, PreDisinfection
TP008 - CL219486Gaseous Chlorination, PostDisinfection
XTP009 - CL219487Gaseous Chlorination, PreDisinfection
XTP009 - CL219487Gaseous Chlorination, PostDisinfection
TP010 - CL2, BLENDING - NO319488Gaseous Chlorination, PreDisinfection
TP010 - CL2, BLENDING - NO319488Gaseous Chlorination, PostDisinfection
TP013 - CL224315Chlorination (FRDS-1.5)Disinfection
TP015 - NO325063Reverse OsmosisInorganics removal
XTP016 - BLENDING - NO325064InnovativeInorganics removal
XTP017 - TEMPORARY - NO325083Reverse OsmosisInorganics removal
XTP018 - BLENDING - NO325319Ion ExchangeInorganics removal
XTP018 - BLENDING - NO325319InnovativeInorganics removal
XTP019 - TEMPORARY - NO325336Reverse OsmosisInorganics removal
TP021 - CL225589Hypochlorination, PostDisinfection
TP022 - NO326916Reverse OsmosisInorganics removal
TP023 - CL2, GAS26941Gaseous Chlorination, PreDisinfection
  • 1 - 28 of 28
For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.