WISTER, OK · Le Flore County

POTEAU VALLEY IMPROVEMENT 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): OK1020104
System type: Community Water System
Population served: 10
Service connections: 147
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2025 – June 30, 2025
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2025 – February 28, 2025
Archived
LSL Inventory
Health-based
LEAD AND COPPER RULE REVISIONS
October 17, 2024 – July 15, 2025
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2024 – March 31, 2024
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2010 – March 31, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2008 – March 31, 2008
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
April 1, 2025 – June 30, 2025	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Archived
February 1, 2025 – February 28, 2025	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
October 17, 2024 – July 15, 2025	LSL Inventory	LEAD AND COPPER RULE REVISIONS	Health-based	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2010 – March 31, 2010	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2008 – March 31, 2008	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

December 1, 2025State Public Notification received3 linked violations
November 25, 2025State Public Notification requested3 linked violations
November 25, 2025State Violation/Reminder Notice3 linked violations
September 15, 2025State no longer subject to Rule1 linked violation
August 26, 2025State Public Notification received1 linked violation
August 20, 2025State Violation/Reminder Notice1 linked violation
August 20, 2025State Public Notification requested1 linked violation
July 15, 2025State Compliance achieved1 linked violation
July 15, 2025State Compliance achieved1 linked violation
July 11, 2025State Violation/Reminder Notice1 linked violation
July 11, 2025State Violation/Reminder Notice1 linked violation
June 18, 2025State no longer subject to Rule1 linked violation
June 18, 2025State no longer subject to Rule1 linked violation
April 15, 2025State Public Notification received1 linked violation
April 3, 2025State Administrative/Compliance Order without penalty issued1 linked violation
April 3, 2025State Public Notification requested1 linked violation
September 4, 2024State Compliance achieved1 linked violation
September 4, 2024State Compliance achieved1 linked violation
September 4, 2024State Compliance achieved1 linked violation
May 15, 2024State Public Notification requested2 linked violations
May 15, 2024State Violation/Reminder Notice3 linked violations
May 15, 2024State Violation/Reminder Notice2 linked violations
May 15, 2024State Public Notification requested2 linked violations
August 30, 2023State Public Notification requested3 linked violations
June 29, 2023State Public Notification received1 linked violation
June 29, 2023State Public Notification received2 linked violations
June 29, 2023State Public Notification received1 linked violation
June 29, 2023State Public Notification received3 linked violations
June 26, 2023State Violation/Reminder Notice6 linked violations
May 18, 2023State Administrative/Compliance Order with penalty issued6 linked violations
February 3, 2023State Public Notification requested1 linked violation
February 3, 2023State Administrative/Compliance Order without penalty issued1 linked violation
December 2, 2022State Public Notification requested1 linked violation
December 2, 2022State Violation/Reminder Notice1 linked violation
October 19, 2022State Violation/Reminder Notice1 linked violation
October 19, 2022State Public Notification requested1 linked violation
December 13, 2019State Public Notification received1 linked violation
December 9, 2019State Public Notification requested1 linked violation
December 9, 2019State Administrative/Compliance Order without penalty issued1 linked violation
April 10, 2019State Compliance achieved1 linked violation
April 10, 2019State Violation/Reminder Notice1 linked violation
April 10, 2019State Public Notification requested1 linked violation
February 28, 2018State Compliance achieved1 linked violation
February 28, 2018State Compliance achieved1 linked violation
October 16, 2017State Public Notification received1 linked violation
September 11, 2017State Public Notification requested1 linked violation
September 11, 2017State Violation/Reminder Notice1 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 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 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 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 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 6, 2016State Public Notification received1 linked violation
May 22, 2015State Intentional no-action2 linked violations
March 28, 2014State Public Notification received1 linked violation
March 14, 2014State Public Notification requested1 linked violation
March 14, 2014State Administrative/Compliance Order with penalty issued1 linked violation
May 7, 2010State Public Notification received2 linked violations
May 3, 2010State Public Notification requested2 linked violations
February 4, 2010State Public Notification received1 linked violation
January 19, 2010State Public Notification requested11 linked violations
January 19, 2010State Administrative/Compliance Order with penalty issued1 linked violation
July 27, 2009State Public Notification requested2 linked violations
November 12, 2008State Compliance achieved2 linked violations
August 28, 2008State Administrative/Compliance Order with penalty issued2 linked violations
November 21, 2007State Compliance achieved4 linked violations
October 22, 2007State Public Notification requested2 linked violations
July 10, 2003State Compliance achieved3 linked violations
May 8, 2003State Administrative/Compliance Order with penalty issued2 linked violations
January 23, 2003State Administrative/Compliance Order with penalty issued2 linked violations
April 15, 1999State Administrative/Compliance Order without penalty issued2 linked violations
July 13, 1993State Consent Decree/Judgement4 linked violations
January 17, 1992State Administrative/Compliance Order without penalty issued2 linked violations

Contact

POTEAU VALLEY IMPROVEMENT AUTHORITY

918-647-9946

WISTER, OK 74966-9124