BLACKWELL, OK · Kay County

BLACKWELL MUNICIPAL AUTHORITY 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): OK1021101
System type: Community Water System
Population served: 7,668
Service connections: 3,136
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2025 – July 31, 2025
Archived
Monitoring and Reporting (DBP)
—
Chlorine dioxide
May 1, 2025 – May 31, 2025
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
May 1, 2025 – May 31, 2025
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
TTHM
April 1, 2025 – May 6, 2025
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2025 – January 31, 2025
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2024 – March 31, 2024
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2024 – March 31, 2024
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2023 – March 31, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2022 – December 31, 2022
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2022 – September 30, 2022
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2021 – May 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
Chlorite
August 1, 2020 – August 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
Chlorite
July 1, 2020 – July 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
Chlorite
March 1, 2020 – March 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
Chlorite
February 1, 2020 – February 29, 2020
Resolved
Monitoring and Reporting (DBP)
—
Chlorite
January 1, 2020 – January 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
Chlorite
December 1, 2019 – December 31, 2019
Resolved
Monitoring and Reporting (DBP)
—
Chlorite
November 1, 2019 – November 30, 2019
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
August 1, 2019 – August 31, 2019
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2019 – May 31, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2018 – September 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2018 – June 30, 2018
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2018 – March 31, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2018 – March 31, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2017 – December 31, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017 – July 1, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2017 – September 30, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2017 – June 30, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2017 – March 31, 2017
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
TTHM
December 30, 2016 – September 30, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2016 – December 31, 2016
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – April 28, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2016 – September 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2016 – June 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2015 – September 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2014 – December 31, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2014 – September 30, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2012 – September 30, 2012
Resolved
Monitoring, Regular
—
Atrazine
July 1, 2012 – September 30, 2012
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – July 10, 2015
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2012 – March 31, 2012
Resolved
Monitoring, Regular
—
Atrazine
July 1, 2011 – September 30, 2011
Resolved
Monitoring, Regular
—
Atrazine
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2009 – May 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2005 – September 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2004 – December 31, 2004
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 – July 31, 2025	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
May 1, 2025 – May 31, 2025	Monitoring and Reporting (DBP)	Chlorine dioxide	—	Resolved
May 1, 2025 – May 31, 2025	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
April 1, 2025 – May 6, 2025	Failure Submit IDSE/Subpart V Plan Rpt	TTHM	—	Resolved
January 1, 2025 – January 31, 2025	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
March 1, 2024 – March 31, 2024	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
March 1, 2024 – March 31, 2024	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2022 – December 31, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
September 1, 2022 – September 30, 2022	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
May 1, 2021 – May 31, 2021	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
August 1, 2020 – August 31, 2020	Monitoring and Reporting (DBP)	Chlorite	—	Resolved
July 1, 2020 – July 31, 2020	Monitoring and Reporting (DBP)	Chlorite	—	Resolved
March 1, 2020 – March 31, 2020	Monitoring and Reporting (DBP)	Chlorite	—	Resolved
February 1, 2020 – February 29, 2020	Monitoring and Reporting (DBP)	Chlorite	—	Resolved
January 1, 2020 – January 31, 2020	Monitoring and Reporting (DBP)	Chlorite	—	Resolved
December 1, 2019 – December 31, 2019	Monitoring and Reporting (DBP)	Chlorite	—	Resolved
November 1, 2019 – November 30, 2019	Monitoring and Reporting (DBP)	Chlorite	—	Resolved
August 1, 2019 – August 31, 2019	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
May 1, 2019 – May 31, 2019	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2018 – September 30, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2018 – June 30, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2018 – March 31, 2018	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2018 – March 31, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2017 – December 31, 2017	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2017 – July 1, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2017 – September 30, 2017	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2017 – June 30, 2017	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2017 – March 31, 2017	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
December 30, 2016 – September 30, 2019	Failure Submit IDSE/Subpart V Plan Rpt	TTHM	—	Resolved
October 1, 2016 – December 31, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2016 – April 28, 2016	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2016 – September 30, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2016 – June 30, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2015 – March 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
September 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2012 – September 30, 2012	Monitoring, Regular	Atrazine	—	Resolved
July 1, 2012 – July 10, 2015	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2012 – March 31, 2012	Monitoring, Regular	Atrazine	—	Resolved
July 1, 2011 – September 30, 2011	Monitoring, Regular	Atrazine	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	2,4-D	—	Resolved
May 1, 2009 – May 31, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2005 – September 30, 2005	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2004 – December 31, 2004	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved

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

Enforcement actions

October 28, 2025State Compliance achieved1 linked violation
October 28, 2025State Compliance achieved1 linked violation
October 8, 2025State Public Notification received2 linked violations
September 12, 2025State Administrative/Compliance Order without penalty issued2 linked violations
September 12, 2025State Public Notification requested2 linked violations
July 23, 2025State Public Notification requested2 linked violations
July 23, 2025State Violation/Reminder Notice2 linked violations
June 26, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
June 18, 2025State Public Notification received1 linked violation
June 12, 2025State Compliance achieved1 linked violation
June 3, 2025State Violation/Reminder Notice1 linked violation
May 22, 2025State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
May 8, 2025State Administrative/Compliance Order without penalty issued1 linked violation
May 8, 2025State Public Notification requested1 linked violation
May 6, 2025State Compliance achieved1 linked violation
March 6, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
March 6, 2025State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
October 29, 2024State Compliance achieved1 linked violation
October 29, 2024State Compliance achieved2 linked violations
October 3, 2024State Public Notification received2 linked violations
September 17, 2024State Administrative/Compliance Order without penalty issued2 linked violations
September 17, 2024State Public Notification requested2 linked violations
September 6, 2024State Public Notification received1 linked violation
August 15, 2024State Public Notification requested1 linked violation
August 15, 2024State Administrative/Compliance Order without penalty issued1 linked violation
July 6, 2023State Public Notification received1 linked violation
June 23, 2023State Compliance achieved1 linked violation
June 23, 2023State Compliance achieved1 linked violation
June 23, 2023State Compliance achieved1 linked violation
May 23, 2023State Compliance achieved1 linked violation
May 23, 2023State Public Notification requested1 linked violation
May 23, 2023State Violation/Reminder Notice1 linked violation
April 26, 2023State Public Notification received1 linked violation
April 12, 2023State Administrative/Compliance Order without penalty issued1 linked violation
April 12, 2023State Public Notification requested1 linked violation
March 21, 2023State Public Notification received1 linked violation
March 14, 2023State Public Notification received1 linked violation
February 23, 2023State Administrative/Compliance Order without penalty issued1 linked violation
February 23, 2023State Public Notification requested1 linked violation
February 23, 2023State Administrative/Compliance Order without penalty issued1 linked violation
February 23, 2023State Public Notification requested1 linked violation
November 3, 2021State Compliance achieved18 linked violations
November 18, 2020State Public Notification received1 linked violation
November 18, 2020State Public Notification received1 linked violation
November 18, 2020State Public Notification received1 linked violation
November 18, 2020State Public Notification received1 linked violation
November 18, 2020State Public Notification received1 linked violation
November 18, 2020State Public Notification received1 linked violation
November 18, 2020State Public Notification received1 linked violation
November 18, 2020State Public Notification received1 linked violation
November 6, 2020State Public Notification requested1 linked violation
November 6, 2020State Violation/Reminder Notice1 linked violation
September 23, 2020State Compliance achieved7 linked violations
September 18, 2020State Public Notification requested1 linked violation
September 18, 2020State Violation/Reminder Notice1 linked violation
July 23, 2020State Public Notification received2 linked violations
July 10, 2020State Public Notification requested2 linked violations
July 10, 2020State Compliance achieved2 linked violations
July 10, 2020State Violation/Reminder Notice2 linked violations
June 17, 2020State Public Notification requested1 linked violation
June 17, 2020State Violation/Reminder Notice1 linked violation
June 17, 2020State Public Notification requested1 linked violation
June 17, 2020State Violation/Reminder Notice1 linked violation
June 17, 2020State Public Notification requested1 linked violation
June 17, 2020State Violation/Reminder Notice1 linked violation
June 17, 2020State Violation/Reminder Notice1 linked violation
June 17, 2020State Public Notification requested2 linked violations
March 6, 2020State Public Notification requested1 linked violation
March 6, 2020State Violation/Reminder Notice1 linked violation
March 4, 2020State Compliance achieved1 linked violation
January 16, 2020State Public Notification requested1 linked violation
January 16, 2020State Violation/Reminder Notice1 linked violation
November 21, 2019State Public Notification received1 linked violation
September 30, 2019State Compliance achieved2 linked violations
May 30, 2019State Public Notification received1 linked violation
May 7, 2019State Public Notification received2 linked violations
May 1, 2019State Violation/Reminder Notice1 linked violation
May 1, 2019State Public Notification requested1 linked violation
February 22, 2019State Violation/Reminder Notice2 linked violations
February 22, 2019State Public Notification requested2 linked violations
August 31, 2018State Public Notification requested1 linked violation
August 31, 2018State Violation/Reminder Notice1 linked violation
May 23, 2018State Violation/Reminder Notice9 linked violations
May 23, 2018State Public Notification requested9 linked violations
March 16, 2018State Public Notification requested1 linked violation
March 16, 2018State Violation/Reminder Notice1 linked violation
November 17, 2017State Violation/Reminder Notice1 linked violation
July 1, 2017State Compliance achieved1 linked violation
March 16, 2017State Violation/Reminder Notice1 linked violation
February 16, 2017State Administrative/Compliance Order with penalty issued18 linked violations
January 3, 2017State Violation/Reminder Notice1 linked violation
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 26, 2016State Compliance achieved1 linked violation
July 26, 2016State Compliance achieved1 linked violation
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 26, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
April 28, 2016State Compliance achieved1 linked violation
April 14, 2016State Public Notification received1 linked violation
March 9, 2016State Administrative/Compliance Order with penalty issued1 linked violation
March 9, 2016State Public Notification requested2 linked violations
December 2, 2015State Public Notification requested2 linked violations
July 10, 2015State Compliance achieved2 linked violations
June 4, 2015State Public Notification requested2 linked violations
March 11, 2015State Administrative/Compliance Order with penalty issued2 linked violations
March 11, 2015State Public Notification requested2 linked violations
December 4, 2014State Public Notification received2 linked violations
October 29, 2014State Administrative/Compliance Order with penalty issued1 linked violation
September 30, 2012State Compliance achieved2 linked violations
July 27, 2009State Public Notification requested2 linked violations
May 11, 2006State Public Notification received1 linked violation
May 11, 2006State Public Notification received1 linked violation
April 11, 2006State Administrative/Compliance Order with penalty issued4 linked violations
January 9, 2006State Public Notification received3 linked violations
December 29, 2005State Public Notification requested3 linked violations
May 10, 2005State Public Notification received2 linked violations
January 28, 2005State Public Notification received2 linked violations
December 29, 2004State Public Notification requested4 linked violations
September 30, 2004State Public Notification received7 linked violations
April 23, 1997State Administrative/Compliance Order without penalty issued1 linked violation
December 20, 1995State Administrative/Compliance Order without penalty issued2 linked violations

Contact

BLACKWELL MUNICIPAL AUTHORITY

580-363-7250

BLACKWELL, OK 74631