ARDMORE, OK · Carter County

SOUTHERN OKLA WATER CORP Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Oklahoma’s official records. Always confirm current status with Oklahoma before making decisions based on this information.

System facts

System ID (PWSID): OK1010830
System type: Community Water System
Population served: 11,250
Service connections: 4,883
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2025 – September 30, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2025 – September 30, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2025 – September 30, 2025
Archived
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2025 – May 31, 2025
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2025 – June 30, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2024 – December 31, 2024
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2024 – March 31, 2024
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2023 – December 31, 2023
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2023 – June 30, 2023
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2023 – June 30, 2023
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2023 – March 31, 2023
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2022 – December 31, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2022 – September 30, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2022 – June 30, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2022 – June 30, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2022 – March 31, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2022 – March 31, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2022 – March 31, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2022 – March 31, 2022
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2021 – December 31, 2021
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2021 – December 31, 2021
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2021 – September 30, 2021
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2021 – September 30, 2021
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2021 – September 30, 2021
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2021 – June 30, 2021
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
January 1, 2021 – March 31, 2021
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2020 – June 30, 2020
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2020 – March 31, 2020
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2019 – September 30, 2019
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2019 – September 30, 2019
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2019 – June 30, 2019
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2019 – March 31, 2019
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2018 – December 31, 2018
Archived
Monitoring, Regular
—
Styrene
July 1, 2018 – September 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2018 – September 30, 2018
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2018 – September 30, 2018
Archived
Monitoring, Regular
—
Ethylbenzene
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
Benzene
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
CHLOROBENZENE
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
Vinyl chloride
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
Xylenes, Total
July 1, 2018 – September 30, 2018
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
July 1, 2018 – September 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2018 – June 30, 2018
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2018 – June 30, 2018
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2018 – March 31, 2018
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2018 – March 31, 2018
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2018 – January 31, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2017 – September 30, 2017
Archived
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2017 – June 30, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2017 – March 31, 2017
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2016 – December 31, 2016
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2016 – December 31, 2016
Archived
Maximum Contaminant Level Violation, E. coli (RTCR)
Health-based
Revised Total Coliform Rule
August 1, 2016 – August 31, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2016 – September 30, 2016
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2016 – September 30, 2016
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2016 – June 30, 2016
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2016 – June 30, 2016
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2016 – June 30, 2016
Archived
Failure Submit IDSE/Subpart V Plan Rpt
—
Total Haloacetic Acids (HAA5)
March 31, 2016 – June 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2016 – March 31, 2016
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2016 – March 31, 2016
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
December 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2015 – December 31, 2015
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2015 – December 31, 2015
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2015 – September 30, 2015
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2015 – June 30, 2015
Archived
Failure Submit IDSE/Subpart V Plan Rpt
—
TTHM
April 1, 2015 – June 9, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2015 – March 31, 2015
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2014 – December 31, 2014
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2013 – December 31, 2013
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2012 – October 31, 2012
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
August 1, 2011 – August 31, 2011
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
August 1, 2011 – August 31, 2011
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2011 – September 30, 2011
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2011 – June 30, 2011
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2011 – June 30, 2011
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2011 – March 31, 2011
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
January 1, 2011 – March 31, 2011
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 1, 2010 – October 31, 2010
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2010 – December 31, 2010
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2010 – September 30, 2010
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
April 1, 2010 – June 30, 2010
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
April 1, 2010 – June 30, 2010
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2010 – March 31, 2010
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2010 – January 31, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2010 – March 31, 2010
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2010 – January 31, 2010
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
October 1, 2009 – December 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2009 – December 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Vinyl chloride
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Carbon tetrachloride
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
CHLOROBENZENE
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Styrene
October 1, 2009 – December 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
October 1, 2009 – December 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
October 1, 2009 – December 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
October 1, 2009 – December 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
July 1, 2009 – September 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2009 – September 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2009 – September 30, 2009
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2009 – July 31, 2009
Resolved
Monitoring, Regular
—
Xylenes, Total
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Styrene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Toluene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
CHLOROBENZENE
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Tetrachloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Xylenes, Total
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Styrene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Ethylbenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Toluene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Benzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
CHLOROBENZENE
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Tetrachloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Carbon tetrachloride
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Xylenes, Total
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Styrene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Ethylbenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Vinyl chloride
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Toluene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Benzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
CHLOROBENZENE
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Tetrachloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Vinyl chloride
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Styrene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Ethylbenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Toluene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Benzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
CHLOROBENZENE
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Tetrachloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Carbon tetrachloride
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Vinyl chloride
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
July 1, 2009 – September 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2009 – June 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2009 – June 30, 2009
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2009 – March 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2008 – December 31, 2008
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2008 – December 31, 2008
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2008 – September 30, 2008
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2008 – September 30, 2008
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2008 – September 30, 2008
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Benzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Toluene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Benzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Toluene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2008 – March 31, 2008
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2007 – September 30, 2007
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
January 1, 2007 – March 31, 2007
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2006 – December 31, 2006
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2004 – December 31, 2007
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2004 – December 31, 2007
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 2000 – March 31, 2000
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1991 – May 31, 1991
Resolved

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2025 – September 30, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2025 – September 30, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2025 – September 30, 2025	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
May 1, 2025 – May 31, 2025	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
April 1, 2025 – June 30, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2024 – December 31, 2024	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2024 – March 31, 2024	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2023 – December 31, 2023	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2023 – June 30, 2023	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2023 – June 30, 2023	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2022 – December 31, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2022 – September 30, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2022 – June 30, 2022	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
April 1, 2022 – June 30, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
October 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
July 1, 2021 – September 30, 2021	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2021 – September 30, 2021	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Archived
July 1, 2021 – September 30, 2021	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
April 1, 2021 – June 30, 2021	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2021 – March 31, 2021	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Archived
April 1, 2020 – June 30, 2020	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2020 – March 31, 2020	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2019 – September 30, 2019	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
July 1, 2019 – September 30, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2019 – June 30, 2019	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
January 1, 2019 – March 31, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2018 – December 31, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2018 – September 30, 2018	Monitoring, Regular	Styrene	—	Resolved
July 1, 2018 – September 30, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2018 – September 30, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
July 1, 2018 – September 30, 2018	Monitoring, Regular	Ethylbenzene	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	Benzene	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	CHLOROBENZENE	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	Vinyl chloride	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	Xylenes, Total	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
April 1, 2018 – June 30, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2018 – June 30, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
January 1, 2018 – March 31, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2018 – March 31, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
January 1, 2018 – January 31, 2018	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2017 – September 30, 2017	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
June 1, 2017 – June 30, 2017	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2017 – March 31, 2017	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
October 1, 2016 – December 31, 2016	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
October 1, 2016 – December 31, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
August 1, 2016 – August 31, 2016	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
July 1, 2016 – September 30, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2016 – September 30, 2016	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
April 1, 2016 – June 30, 2016	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Archived
April 1, 2016 – June 30, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2016 – June 30, 2016	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
March 31, 2016 – June 30, 2016	Failure Submit IDSE/Subpart V Plan Rpt	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
January 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
December 1, 2015 – December 31, 2015	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
October 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
October 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2015 – June 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 1, 2015 – June 9, 2015	Failure Submit IDSE/Subpart V Plan Rpt	TTHM	—	Resolved
January 1, 2015 – March 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2013 – December 31, 2013	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2012 – October 31, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2011 – August 31, 2011	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
August 1, 2011 – August 31, 2011	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2011 – September 30, 2011	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
June 1, 2011 – June 30, 2011	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
April 1, 2011 – June 30, 2011	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
January 1, 2011 – March 31, 2011	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
January 1, 2011 – March 31, 2011	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
October 1, 2010 – October 31, 2010	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2010 – December 31, 2010	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
July 1, 2010 – September 30, 2010	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
April 1, 2010 – June 30, 2010	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
April 1, 2010 – June 30, 2010	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
March 1, 2010 – March 31, 2010	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2010 – January 31, 2010	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2010 – March 31, 2010	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2010 – January 31, 2010	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
December 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
October 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Vinyl chloride	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Carbon tetrachloride	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	CHLOROBENZENE	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Styrene	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2009 – July 31, 2009	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Xylenes, Total	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Styrene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Toluene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	CHLOROBENZENE	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Tetrachloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Xylenes, Total	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Styrene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Ethylbenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Toluene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Benzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	CHLOROBENZENE	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Tetrachloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Carbon tetrachloride	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Xylenes, Total	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Styrene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Ethylbenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Vinyl chloride	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Toluene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Benzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	CHLOROBENZENE	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Tetrachloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Vinyl chloride	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Styrene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Ethylbenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Toluene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Benzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	CHLOROBENZENE	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Tetrachloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Carbon tetrachloride	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	Vinyl chloride	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2009 – March 31, 2009	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2008 – December 31, 2008	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2008 – December 31, 2008	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2008 – September 30, 2008	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2008 – September 30, 2008	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2008 – September 30, 2008	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
March 1, 2008 – March 31, 2008	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Benzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Toluene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Benzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Toluene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 2007 – September 30, 2007	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
January 1, 2007 – March 31, 2007	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
October 1, 2006 – December 31, 2006	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
April 1, 2005 – June 30, 2005	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2004 – December 31, 2007	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
March 1, 2000 – March 31, 2000	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
May 1, 1991 – May 31, 1991	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

December 31, 2025State Public Notification received4 linked violations
December 9, 2025State Public Notification requested4 linked violations
December 2, 2025State Compliance achieved2 linked violations
August 27, 2025State Public Notification received2 linked violations
August 20, 2025State Violation/Reminder Notice1 linked violation
August 20, 2025State Public Notification requested1 linked violation
August 11, 2025State Public Notification requested2 linked violations
July 2, 2025State Public Notification received1 linked violation
May 23, 2025State Public Notification requested2 linked violations
April 11, 2025State Administrative/Compliance Order with penalty issued69 linked violations
February 26, 2025State Public Notification requested3 linked violations
December 4, 2024State Public Notification received3 linked violations
November 12, 2024State Public Notification requested3 linked violations
September 3, 2024State Public Notification received2 linked violations
August 5, 2024State Public Notification requested1 linked violation
May 8, 2024State Public Notification requested2 linked violations
February 9, 2024State Public Notification requested2 linked violations
September 20, 2023State Public Notification received3 linked violations
May 23, 2023State Public Notification requested3 linked violations
March 16, 2023State Violation/Reminder Notice3 linked violations
December 22, 2022State Public Notification requested4 linked violations
December 22, 2022State Violation/Reminder Notice4 linked violations
September 13, 2022State Public Notification received6 linked violations
February 22, 2022State Compliance achieved3 linked violations
February 17, 2022State Public Notification requested2 linked violations
February 17, 2022State Violation/Reminder Notice2 linked violations
September 8, 2021State Public Notification received1 linked violation
September 8, 2021State Public Notification received1 linked violation
August 12, 2021State Violation/Reminder Notice1 linked violation
May 18, 2021State Public Notification requested14 linked violations
January 27, 2021State Public Notification received1 linked violation
January 21, 2021State Public Notification requested1 linked violation
August 27, 2020State Public Notification requested1 linked violation
June 1, 2020State Public Notification received1 linked violation
March 12, 2020State Public Notification received2 linked violations
February 3, 2020State Violation/Reminder Notice3 linked violations
November 5, 2019State Public Notification requested3 linked violations
November 5, 2019State Violation/Reminder Notice2 linked violations
July 23, 2019State Public Notification requested2 linked violations
July 23, 2019State Violation/Reminder Notice2 linked violations
May 17, 2019State Public Notification requested2 linked violations
May 17, 2019State Violation/Reminder Notice2 linked violations
January 31, 2019State Public Notification requested3 linked violations
January 11, 2019State Compliance achieved3 linked violations
December 28, 2018State Public Notification received3 linked violations
December 28, 2018State Public Notification received2 linked violations
December 17, 2018State Administrative/Compliance Order without penalty issued2 linked violations
November 21, 2018State Violation/Reminder Notice4 linked violations
November 21, 2018State Compliance achieved22 linked violations
November 15, 2018State Violation/Reminder Notice21 linked violations
July 5, 2018State Compliance achieved1 linked violation
April 30, 2018State Violation/Reminder Notice2 linked violations
April 30, 2018State Public Notification requested2 linked violations
April 30, 2018State Public Notification received1 linked violation
March 2, 2018State Public Notification received3 linked violations
January 30, 2018State Violation/Reminder Notice4 linked violations
October 30, 2017State Public Notification requested4 linked violations
September 1, 2017State Public Notification received3 linked violations
August 16, 2017State Public Notification requested2 linked violations
August 16, 2017State Violation/Reminder Notice3 linked violations
May 1, 2017State Public Notification requested2 linked violations
March 1, 2017State Public Notification received1 linked violation
March 1, 2017State Public Notification received3 linked violations
February 27, 2017State Administrative/Compliance Order with penalty issued9 linked violations
February 6, 2017State Public Notification requested1 linked violation
February 3, 2017State Public Notification received2 linked violations
February 2, 2017State Administrative/Compliance Order with penalty issued45 linked violations
February 1, 2017State Public Notification requested2 linked violations
February 1, 2017State Violation/Reminder Notice2 linked violations
December 20, 2016State Public Notification requested15 linked violations
December 20, 2016State Violation/Reminder Notice7 linked violations
August 27, 2016State Public Notification requested1 linked violation
July 25, 2016State Compliance achieved1 linked violation
July 25, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 25, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 25, 2016State Compliance achieved1 linked violation
July 25, 2016State Compliance achieved1 linked violation
July 25, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 25, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 25, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 25, 2016State Compliance achieved13 linked violations
June 30, 2016State Compliance achieved10 linked violations
June 3, 2016State Violation/Reminder Notice2 linked violations
December 11, 2015State Administrative/Compliance Order with penalty issued2 linked violations
September 15, 2015State Administrative/Compliance Order with penalty issued2 linked violations
June 19, 2015State Administrative/Compliance Order with penalty issued3 linked violations
June 9, 2015State Compliance achieved2 linked violations
June 2, 2015State Violation/Reminder Notice2 linked violations
December 4, 2014State Administrative/Compliance Order with penalty issued5 linked violations
July 26, 2012Federal Compliance achieved1 linked violation
July 20, 2010State Public Notification received2 linked violations
June 29, 2010State Compliance achieved9 linked violations
June 25, 2010State Public Notification received10 linked violations
May 3, 2010State Administrative/Compliance Order with penalty issued11 linked violations
April 8, 2010State Violation/Reminder Notice3 linked violations
April 6, 2010State Public Notification received3 linked violations
March 25, 2010State Public Notification received189 linked violations
February 12, 2010State Administrative/Compliance Order with penalty issued13 linked violations
February 9, 2010State Violation/Reminder Notice3 linked violations
January 27, 2010State Violation/Reminder Notice2 linked violations
January 12, 2010State Public Notification requested22 linked violations
January 12, 2010State Violation/Reminder Notice22 linked violations
December 14, 2009State Public Notification requested2 linked violations
December 14, 2009State Public Notification requested22 linked violations
October 27, 2009State Public Notification requested5 linked violations
October 23, 2009State Violation/Reminder Notice85 linked violations
May 21, 2009State Public Notification requested6 linked violations
May 12, 2009State Public Notification requested22 linked violations
May 12, 2009State Public Notification requested23 linked violations
May 12, 2009State Violation/Reminder Notice22 linked violations
May 12, 2009State Public Notification requested22 linked violations
October 8, 2008State Public Notification requested6 linked violations
August 7, 2008State Violation/Reminder Notice2 linked violations
June 23, 2008State Administrative/Compliance Order with penalty issued7 linked violations
March 18, 2008State Administrative/Compliance Order with penalty issued4 linked violations
January 2, 2008State Administrative/Compliance Order with penalty issued4 linked violations
November 27, 2007State Administrative/Compliance Order with penalty issued4 linked violations
November 20, 2007State Public Notification requested3 linked violations
October 23, 2007State Public Notification requested4 linked violations
October 4, 2007State Public Notification received4 linked violations
September 19, 2007State Public Notification requested7 linked violations
March 1, 2007State Public Notification requested7 linked violations
September 20, 2005State Administrative/Compliance Order with penalty issued29 linked violations
April 15, 1999State Administrative/Compliance Order without penalty issued3 linked violations
October 24, 1994State Administrative/Compliance Order without penalty issued6 linked violations

Contact

SOUTHERN OKLA WATER CORP

580-223-8961

ARDMORE, OK 73401-1611