CLARKTON, MO · Dunklin County

CLARKTON PWS 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 Missouri’s official records. Always confirm current status with Missouri before making decisions based on this information.

System facts

System ID (PWSID): MO4010170
System type: Community Water System
Population served: 1,124
Service connections: 499
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2025 – June 30, 2025
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
December 1, 2024 – December 31, 2024
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2024 – May 31, 2024
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2024 – December 31, 2024
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
October 1, 2022 – October 31, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2022 – June 30, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
May 26, 2022 – April 27, 2023
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2022 – December 31, 2022
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
May 1, 2021 – May 31, 2021
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
April 1, 2021 – April 30, 2021
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2020 – November 9, 2020
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
January 1, 2020 – January 31, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2019 – December 31, 2019
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
December 1, 2019 – December 31, 2019
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
October 1, 2018 – October 31, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
July 1, 2017 – July 31, 2017
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2015 – November 30, 2015
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
July 1, 2015 – July 31, 2015
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
April 1, 2015 – April 30, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2015 – April 30, 2015
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2013 – June 30, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2012 – November 30, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2012 – May 31, 2012
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
May 1, 2012 – May 31, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2007 – July 31, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2002 – October 31, 2002
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 2001 – December 31, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2001 – November 30, 2001
Resolved

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

Period	Violation	Contaminant / rule	Health-based	Status
June 1, 2025 – June 30, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2024 – December 31, 2024	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Archived
May 1, 2024 – May 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – December 31, 2024	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
October 1, 2022 – October 31, 2022	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
June 1, 2022 – June 30, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
May 26, 2022 – April 27, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2022 – December 31, 2022	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
May 1, 2021 – May 31, 2021	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
April 1, 2021 – April 30, 2021	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
July 1, 2020 – November 9, 2020	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2020 – January 31, 2020	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
December 1, 2019 – December 31, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2019 – December 31, 2019	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
October 1, 2018 – October 31, 2018	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
July 1, 2017 – July 31, 2017	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
November 1, 2015 – November 30, 2015	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2015 – July 31, 2015	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
April 1, 2015 – April 30, 2015	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
April 1, 2015 – April 30, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 2013 – June 30, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2012 – November 30, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 2012 – May 31, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 2012 – May 31, 2012	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
July 1, 2007 – July 31, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2002 – October 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2002 – December 31, 2002	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
December 1, 2001 – December 31, 2001	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 2001 – November 30, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

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

Enforcement actions

August 13, 2025State Public Notification received3 linked violations
July 23, 2025State Public Notification requested5 linked violations
July 23, 2025State Violation/Reminder Notice3 linked violations
July 14, 2025State Compliance achieved3 linked violations
July 8, 2025State Compliance achieved3 linked violations
June 9, 2025State Violation/Reminder Notice3 linked violations
May 9, 2025State Public Notification received3 linked violations
February 25, 2025State Public Notification requested3 linked violations
February 6, 2025State Public Notification received3 linked violations
August 13, 2024State Public Notification received4 linked violations
July 2, 2024State Public Notification requested4 linked violations
April 28, 2023State Public Notification received4 linked violations
August 1, 2022State Violation/Reminder Notice6 linked violations
July 16, 2021State Public Notification received30 linked violations
November 9, 2020State Compliance achieved3 linked violations
March 3, 2020State Public Notification received2 linked violations
March 2, 2020State Public Notification received2 linked violations
February 27, 2020State Formal Notice of Violation issued2 linked violations
January 31, 2020State Violation/Reminder Notice2 linked violations
January 31, 2020State Public Notification requested2 linked violations
January 31, 2020State Violation/Reminder Notice2 linked violations
December 27, 2018State Compliance achieved2 linked violations
November 28, 2018State Public Notification requested2 linked violations
September 28, 2017State Compliance achieved2 linked violations
August 30, 2017State Public Notification requested2 linked violations
January 6, 2016State Violation/Reminder Notice2 linked violations
January 6, 2016State Public Notification requested2 linked violations
October 2, 2015State Public Notification received2 linked violations
August 31, 2015State Public Notification requested2 linked violations
August 29, 2013State Public Notification received7 linked violations
February 14, 2013State Public Notification received2 linked violations
December 21, 2012State Public Notification requested3 linked violations
December 18, 2002State Public Notification requested5 linked violations
August 15, 2002State Compliance achieved7 linked violations
March 4, 2002State Public Notification requested6 linked violations

Contact

RILEY, DIANE

573-448-3728

CLARKTON, MO 63837-0000