GROVE, OK · Delaware County

SENECA-CAYUGA NATION 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): OK1221644
System type: Community Water System
Population served: 400
Service connections: 45
Ownership: Native American tribal
Water source: groundwater (wells)

Violation history

Monitoring, Regular
—
Endrin
January 1, 2025 – March 31, 2025
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Diquat
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2023 – December 31, 2023
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
September 28, 2022 – May 2, 2023
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2022 – December 31, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
November 17, 2021 – May 2, 2023
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – July 23, 2018
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2015 – March 31, 2015
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2015 – March 31, 2015
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2015 – March 31, 2015
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
July 1, 2012 – July 31, 2012
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2025 – March 31, 2025	Monitoring, Regular	Endrin	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Diquat	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
September 28, 2022 – May 2, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2022 – December 31, 2022	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
November 17, 2021 – May 2, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2016 – July 23, 2018	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2015 – March 31, 2015	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2015 – March 31, 2015	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2015 – March 31, 2015	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
July 1, 2012 – July 31, 2012	Monitoring, Source Water (GWR)	E. COLI	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

December 10, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 9, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 13, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 11, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 11, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
June 3, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
June 3, 2025State Violation/Reminder Notice13 linked violations
March 12, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 6, 2025State Violation/Reminder Notice31 linked violations
March 6, 2025State Public Notification requested31 linked violations
November 22, 2024State Public Notification requested30 linked violations
September 26, 2024State Public Notification requested3 linked violations
August 21, 2024State Public Notification requested6 linked violations
July 1, 2024State Compliance achieved23 linked violations
July 1, 2024State Compliance achieved24 linked violations
June 3, 2024State Compliance achieved5 linked violations
February 28, 2024State Public Notification requested27 linked violations
November 30, 2023State Public Notification requested4 linked violations
August 30, 2023State Public Notification requested3 linked violations
May 2, 2023State Compliance achieved5 linked violations
May 2, 2023State Compliance achieved4 linked violations
May 2, 2023State Compliance achieved7 linked violations
May 2, 2023State Compliance achieved4 linked violations
April 10, 2023State Compliance achieved5 linked violations
March 14, 2023State Public Notification requested23 linked violations
March 14, 2023State Public Notification requested5 linked violations
February 22, 2023State Public Notification received13 linked violations
February 22, 2023State Public Notification received4 linked violations
February 22, 2023State Public Notification received26 linked violations
February 3, 2023State Administrative/Compliance Order without penalty issued68 linked violations
October 19, 2022State Violation/Reminder Notice4 linked violations
March 1, 2022State Public Notification requested44 linked violations
March 1, 2022State Violation/Reminder Notice54 linked violations
January 21, 2022State Violation/Reminder Notice6 linked violations
December 30, 2021State Compliance achieved27 linked violations
August 13, 2021State Public Notification requested10 linked violations
December 11, 2020State Violation/Reminder Notice5 linked violations
November 6, 2020State Public Notification requested4 linked violations
July 28, 2020State Public Notification requested5 linked violations
March 6, 2020State Violation/Reminder Notice7 linked violations
March 6, 2020State Public Notification requested3 linked violations
September 26, 2019State Violation/Reminder Notice5 linked violations
September 26, 2019State Public Notification requested7 linked violations
August 6, 2019State Compliance achieved4 linked violations
March 18, 2019State Violation/Reminder Notice7 linked violations
March 18, 2019State Public Notification requested6 linked violations
February 25, 2019State Public Notification requested3 linked violations
February 25, 2019State Violation/Reminder Notice3 linked violations
February 25, 2019State Public Notification requested3 linked violations
January 18, 2019State Compliance achieved4 linked violations
January 18, 2019State Violation/Reminder Notice5 linked violations
December 14, 2018State Public Notification requested4 linked violations
December 14, 2018State Public Notification requested4 linked violations
October 15, 2018State Violation/Reminder Notice3 linked violations
September 14, 2018State Public Notification requested3 linked violations
July 28, 2018State Public Notification received24 linked violations
July 23, 2018State Public Notification received2 linked violations
July 23, 2018State Public Notification received25 linked violations
July 23, 2018State Compliance achieved4 linked violations
July 23, 2018State Compliance achieved3 linked violations
July 23, 2018State Compliance achieved4 linked violations
July 23, 2018State Public Notification received10 linked violations
July 23, 2018State Public Notification received3 linked violations
July 23, 2018State Public Notification received1 linked violation
July 3, 2018State Compliance achieved2 linked violations
June 14, 2018State Public Notification requested1 linked violation
June 14, 2018State Violation/Reminder Notice2 linked violations
June 14, 2018State Violation/Reminder Notice1 linked violation
March 21, 2018State Compliance achieved1 linked violation
March 21, 2018State Compliance achieved1 linked violation
March 21, 2018State Compliance achieved2 linked violations
March 20, 2018State Administrative/Compliance Order without penalty issued50 linked violations
March 16, 2018State Violation/Reminder Notice6 linked violations
March 16, 2018State Public Notification requested3 linked violations
February 20, 2018State Compliance achieved3 linked violations
February 13, 2018State Violation/Reminder Notice22 linked violations
February 13, 2018State Public Notification requested22 linked violations
November 13, 2017State Public Notification requested2 linked violations
November 13, 2017State Violation/Reminder Notice1 linked violation
September 16, 2015State Public Notification requested4 linked violations
July 21, 2015State Public Notification requested2 linked violations
July 7, 2015State Public Notification requested23 linked violations
June 16, 2015State Public Notification requested24 linked violations
May 26, 2015State Compliance achieved45 linked violations
January 14, 2015State Violation/Reminder Notice1 linked violation
April 8, 2010State Public Notification requested4 linked violations
June 2, 2009State Compliance achieved4 linked violations
May 12, 2009State Public Notification received5 linked violations
February 12, 2009State Public Notification requested5 linked violations
June 21, 2006State Compliance achieved5 linked violations
December 15, 2005State Compliance achieved25 linked violations
December 10, 2004State Public Notification received30 linked violations
August 18, 2003State Public Notification requested30 linked violations
October 18, 2002State Compliance achieved2 linked violations
August 7, 2002State Administrative/Compliance Order with penalty issued1 linked violation
May 11, 2001State Administrative/Compliance Order with penalty issued1 linked violation

Contact

SENECA-CAYUGA NATION PUBLIC WORKS

918-787-6546

GROVE, OK 74345-3220