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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDOK1010830
PWS NameSOUTHERN OKLA WATER CORP
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served11250
County ServedCarter

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
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127729Known01-JUL-202530-SEP-2025Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127728Known01-JUL-202530-SEP-2025Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127730Known01-JUL-202530-SEP-2025Yes
TTSingle Turbidity Exceed (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule127726Returned to Compliance01-MAY-202531-MAY-2025Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127724Known01-APR-202530-JUN-2025Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127717Known01-JAN-202531-MAR-2025Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127713Known01-OCT-202431-DEC-2024Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127712Known01-OCT-202431-DEC-2024Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127707Known01-JUL-202430-SEP-2024Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127708Known01-JUL-202430-SEP-2024Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127702Known01-APR-202430-JUN-2024Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127697Known01-JAN-202431-MAR-2024Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127689Known01-OCT-202331-DEC-2023Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127681Known01-JUL-202330-SEP-2023Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127682Known01-JUL-202330-SEP-2023Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127674Known01-APR-202330-JUN-2023Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127675Known01-APR-202330-JUN-2023Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127670Known01-JAN-202331-MAR-2023Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127664Known01-OCT-202231-DEC-2022Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127657Known01-JUL-202230-SEP-2022Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127655Known01-APR-202230-JUN-2022Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127656Known01-APR-202230-JUN-2022Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127653Known01-JAN-202231-MAR-2022Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127651Known01-JAN-202231-MAR-2022Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127650Known01-JAN-202231-MAR-2022Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127652Known01-JAN-202231-MAR-2022Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127638Known01-OCT-202131-DEC-2021Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127637Known01-OCT-202131-DEC-2021Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127626Known01-JUL-202130-SEP-2021Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127625Known01-JUL-202130-SEP-2021Yes
TTTreatment Technique Precursor RemovalStage 1 Disinfectants and Disinfection Byproducts RuleCARBON, TOTAL127627Known01-JUL-202130-SEP-2021Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127619Known01-APR-202130-JUN-2021Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127608Known01-JAN-202131-MAR-2021Yes
TTTreatment Technique Precursor RemovalStage 1 Disinfectants and Disinfection Byproducts RuleCARBON, TOTAL127609Known01-JAN-202131-MAR-2021Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127601Known01-OCT-202031-DEC-2020Yes
TTSingle Turbidity Exceed (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule127599Returned to Compliance01-OCT-202031-OCT-2020Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127593Known01-JUL-202030-SEP-2020Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127531Known01-APR-202030-JUN-2020Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127522Known01-JAN-202031-MAR-2020Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127517Known01-OCT-201931-DEC-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127516Known01-OCT-201931-DEC-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127499Known01-JUL-201930-SEP-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127498Known01-JUL-201930-SEP-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127492Known01-APR-201930-JUN-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127491Known01-APR-201930-JUN-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127484Known01-JAN-201931-MAR-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127483Known01-JAN-201931-MAR-2019Yes
TTMonthly Turbidity Exceed (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule127465Returned to Compliance01-OCT-201831-OCT-2018Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM127469Known01-OCT-201831-DEC-2018Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)127462Known01-JUL-201830-SEP-2018Yes
  • 1 - 50 of 416

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
9005444127729SIFState Public Notification received31-DEC-2025State -
9005444127730SIFState Public Notification received31-DEC-2025State -
9005444127728SIFState Public Notification received31-DEC-2025State -
9005441127726SOXState Compliance achieved02-DEC-2025StateMAY2025 Turbidity TT. Closed 12/2/2025, system achieved compliance.
9005440127724SIFState Public Notification received27-AUG-2025State -
9005434127717SIFState Public Notification received02-JUL-2025State -
9005431127231SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127713SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127236SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127239SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127248SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127250SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127261SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127264SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127295SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127297SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127321SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127323SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127333SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127335SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127350SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127351SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127360SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127361SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127372SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127373SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127462SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127463SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127469SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127483SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127484SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127491SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127492SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127498SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127499SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127516SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127517SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127522SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127531SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127593SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127601SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127608SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127609SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127619SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127625SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127626SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127627SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127637SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127638SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
9005431127650SFOState Administrative/Compliance Order with penalty issued11-APR-2025StateStage 2 TTHM MCL, Construction & Operational Violations.
  • 1 - 50 of 416

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
ARDMORE 231666YesConsecutive ConnectionSurface waterPermanentActive
NEWPORT WELL #225709YesWell Ground waterPermanentInactive
MARIETTA WELL11243YesWell Ground waterPermanentInactive
RUDD SPRING11242YesWell Ground waterPermanentInactive
BANKS WELL #130244YesWell Ground waterPermanentActive
NEWPORT #629702YesWell Ground waterPermanentActive
MCKINNEY #2 WELL28976YesWell Ground waterPermanentActive
MCKINNEY WELL25668YesWell Ground waterPermanentActive
WOODFORD WELL #225667YesWell Ground waterPermanentActive
SHIGGIN WELL25049YesWell Ground waterPermanentActive
NEWPORT WELL25048YesWell Ground waterPermanentActive
WILLIS WELL25047YesWell Ground waterPermanentActive
WOODFORD WELL22366YesWell Ground waterPermanentActive
LAKE MURRAY15701YesIntakeSurface waterPermanentActive
ARBUCKLE LAKE15680YesIntakeSurface waterPermanentActive
ARDMORE 331667YesConsecutive ConnectionSurface waterPermanentActive
ARDMORE 431668YesConsecutive ConnectionSurface waterPermanentActive
ARDMORE 125278YesConsecutive ConnectionSurface waterSeasonalActive
DISTRIBUTION SYSTEM17218NoDistribution System/Zone - - Active
TOC RAW - ARBUCKLE LAKE23084NoSampling Station - - Active
TOC RAW - LAKE MURRAY23093NoSampling Station - - Active
POE01 - ARBUCKLE LAKE WTP22294NoSampling Station - - Inactive
POE02 - LAKE MURRAY WTP22303NoSampling Station - - Inactive
MARIETTA STANDPIPE31653NoStorage - - Active
SHIGGEN STANDPIPE31655NoStorage - - Active
SPRINGER STANDPIPE31656NoStorage - - Active
WOODFORD STANDPIPE31657NoStorage - - Active
DICKSON-NORTH STANDPIPE31658NoStorage - - Active
WALKER STANDPIPE31661NoStorage - - Active
LONE GROVE STANDPIPE31662NoStorage - - Active
PEAR GROVE STANDPIPE31652NoStorage - - Inactive
CARTER STANDPIPE31654NoStorage - - Inactive
DICKSON-SOUTH STANDPIPE31659NoStorage - - Inactive
HATLEY BEAN STANDPIP31660NoStorage - - Inactive
GENE AUTRY STANDPIPE31663NoStorage - - Inactive
MEEK STANDPIPE31664NoStorage - - Inactive
LANG STANDPIPE31665NoStorage - - Inactive
SOWC - ARBUCKLE LAKE WTP10845NoTreatment Plant - - Active
SOWC LAKE MURRAY STATE PARK WTP10853NoTreatment Plant - - Active
CL2 WOODFORD WELL25710NoTreatment Plant - - Active
CL2 WILLIS WELL25711NoTreatment Plant - - Active
CL2 NEWPORT WELL25712NoTreatment Plant - - Active
CL2 SHIGGIN WELL25713NoTreatment Plant - - Active
CL2 WOODFORD WELL #225714NoTreatment Plant - - Active
CL2 MCKINNEY WELL25715NoTreatment Plant - - Active
CL2 STATION MCKINNEY #2 WELL28977NoTreatment Plant - - Active
CL2 STATION AT NEWPORT #629704NoTreatment Plant - - Active
PHOSPHATE AND CL2 STATION BANK 1 WELL30245NoTreatment Plant - - Active
CL2 NEWPORT WELL #225716NoTreatment Plant - - Inactive
  • 1 - 49 of 49

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
SOWC - ARBUCKLE LAKE WTP10845CoagulationParticulate removal
SOWC - ARBUCKLE LAKE WTP10845Gaseous Chlorination, PreDisinfection
SOWC - ARBUCKLE LAKE WTP10845Chlorine DioxideDisinfection
SOWC - ARBUCKLE LAKE WTP10845Filtration, Rapid SandParticulate removal
SOWC - ARBUCKLE LAKE WTP10845pH AdjustmentCorrosion control
SOWC - ARBUCKLE LAKE WTP10845pH Adjustment, PreSoftening (hardness removal)
SOWC LAKE MURRAY STATE PARK WTP10853Gaseous Chlorination, PostDisinfection
SOWC LAKE MURRAY STATE PARK WTP10853CoagulationParticulate removal
SOWC LAKE MURRAY STATE PARK WTP10853Gaseous Chlorination, PreDisinfection
SOWC LAKE MURRAY STATE PARK WTP10853SedimentationParticulate removal
SOWC LAKE MURRAY STATE PARK WTP10853Filtration, Rapid SandParticulate removal
SOWC LAKE MURRAY STATE PARK WTP10853pH AdjustmentCorrosion control
CL2 WOODFORD WELL25710Hypochlorination, PostDisinfection
CL2 WILLIS WELL25711Hypochlorination, PostDisinfection
CL2 NEWPORT WELL25712Hypochlorination, PostDisinfection
CL2 SHIGGIN WELL25713Hypochlorination, PostDisinfection
CL2 WOODFORD WELL #225714Hypochlorination, PostDisinfection
CL2 MCKINNEY WELL25715Hypochlorination, PostDisinfection
CL2 NEWPORT WELL #225716Hypochlorination, PostDisinfection
CL2 STATION MCKINNEY #2 WELL28977Hypochlorination, PostDisinfection
CL2 STATION AT NEWPORT #629704Hypochlorination, PostDisinfection
PHOSPHATE AND CL2 STATION BANK 1 WELL30245SequestrationIron removal
PHOSPHATE AND CL2 STATION BANK 1 WELL30245Hypochlorination, PostDisinfection
  • 1 - 23 of 23
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.