OK · Delaware County
SENECA-CAYUGA NATION Water System
Consumer Confidence Report status
SENECA-CAYUGA NATION must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for SENECA-CAYUGA NATION.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)
SENECA-CAYUGA NATION is one of 1,277 community water systems in Oklahoma in the 500 or fewer people size category, serving 400 people from groundwater.
As of August 1, 2026, its federal record holds 70 entries between 2007 and 2025, all of which EPA lists as closed.
Of the 70, 63 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, synthetic organic chemicals, and the Lead and Copper Rule.
Violation history
Follow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
July 1, 2025 – December 10, 2025
ResolvedMonitoring, Regular
—BHC-GAMMA
January 1, 2025 – March 31, 2025
ResolvedMonitoring, Regular
—2,4,5-TP
January 1, 2025 – March 31, 2025
ResolvedMonitoring, Regular
—Dinoseb
January 1, 2025 – March 31, 2025
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 2025 – March 31, 2025
ResolvedLSL Reporting
—LEAD AND COPPER RULE REVISIONS
October 17, 2024 – March 12, 2025
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Simazine
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) adipate
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Glyphosate
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Toxaphene
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Dalapon
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Chlordane
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—1,2-DIBROMO-3-CHLOROPROPANE
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Benzo(a)pyrene
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Heptachlor epoxide
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—LASSO
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Glyphosate
July 1, 2024 – September 30, 2024
ResolvedMonitoring, Regular
—1,2-DIBROMO-3-CHLOROPROPANE
July 1, 2024 – September 30, 2024
ResolvedMonitoring, Regular
—Total Polychlorinated Biphenyls (PCB)
July 1, 2024 – September 30, 2024
ResolvedMonitoring, Regular
—Pentachlorophenol
July 1, 2024 – September 30, 2024
ResolvedMonitoring, Regular
—Benzo(a)pyrene
July 1, 2024 – September 30, 2024
ResolvedMonitoring, Regular
—Dinoseb
July 1, 2024 – September 30, 2024
ResolvedMonitoring, Regular
—Diquat
July 1, 2024 – September 30, 2024
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2023 – December 31, 2023
ResolvedMonitoring, Regular
—Styrene
January 1, 2023 – December 31, 2023
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2023 – December 31, 2023
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
September 28, 2022 – May 2, 2023
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
September 28, 2022 – May 2, 2023
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2022 – December 31, 2022
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2022 – December 31, 2022
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2022 – December 31, 2022
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2022 – December 31, 2022
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2022 – December 31, 2022
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2022 – December 31, 2022
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
August 8, 2021 – May 2, 2023
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
March 17, 2021 – May 2, 2023
ResolvedMonitoring, Regular
—Benzene
January 1, 2021 – December 31, 2021
ResolvedMonitoring, Regular
—Styrene
January 1, 2021 – December 31, 2021
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2021 – December 31, 2021
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2021 – December 31, 2021
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2021 – December 31, 2021
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2021 – December 31, 2021
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2021 – December 31, 2021
ResolvedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
October 1, 2020 – December 10, 2025
ResolvedMonitoring and Reporting (DBP)
—Chlorine
July 1, 2020 – September 30, 2020
ResolvedMonitoring and Reporting (DBP)
—Chlorine
October 1, 2018 – December 31, 2018
ResolvedMonitoring and Reporting (DBP)
—Chlorine
April 1, 2018 – June 30, 2018
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
January 1, 2018 – January 31, 2018
ResolvedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
October 1, 2017 – March 21, 2018
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2017 – December 31, 2017
ResolvedMonitoring, Regular
—Fluoride
January 1, 2017 – December 31, 2019
ArchivedMonitoring, Regular
—CHLOROBENZENE
January 1, 2017 – December 31, 2017
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2017 – December 31, 2017
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2017 – December 31, 2017
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2016 – July 23, 2018
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2015 – March 31, 2015
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2015 – March 31, 2015
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2015 – March 31, 2015
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2015 – March 31, 2015
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2015 – March 31, 2015
ResolvedMonitoring, Regular
—Vinyl chloride
October 1, 2014 – December 31, 2014
ResolvedMonitoring, Regular
—Toluene
October 1, 2014 – December 31, 2014
ResolvedMonitoring, Regular
—Carbon tetrachloride
October 1, 2014 – December 31, 2014
ResolvedMonitoring, Regular
—1,2-Dichloroethane
October 1, 2014 – December 31, 2014
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
October 1, 2014 – December 31, 2014
ResolvedMonitoring, Source Water (GWR)
—E. COLI
July 1, 2012 – July 31, 2012
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2008 – March 23, 2011
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2007 – March 23, 2011
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 |
|---|---|---|---|---|
| July 1, 2025 – December 10, 2025 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| January 1, 2025 – March 31, 2025 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| January 1, 2025 – March 31, 2025 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| January 1, 2025 – March 31, 2025 | Monitoring, Regular | Dinoseb | — | Resolved |
| January 1, 2025 – March 31, 2025 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Resolved |
| October 17, 2024 – March 12, 2025 | LSL Reporting | LEAD AND COPPER RULE REVISIONS | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Simazine | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Glyphosate | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Toxaphene | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Dalapon | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Chlordane | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | 1,2-DIBROMO-3-CHLOROPROPANE | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Heptachlor epoxide | — | Resolved |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | LASSO | — | Resolved |
| July 1, 2024 – September 30, 2024 | Monitoring, Regular | Glyphosate | — | Resolved |
| July 1, 2024 – September 30, 2024 | Monitoring, Regular | 1,2-DIBROMO-3-CHLOROPROPANE | — | Resolved |
| July 1, 2024 – September 30, 2024 | Monitoring, Regular | Total Polychlorinated Biphenyls (PCB) | — | Resolved |
| July 1, 2024 – September 30, 2024 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| July 1, 2024 – September 30, 2024 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| July 1, 2024 – September 30, 2024 | Monitoring, Regular | Dinoseb | — | Resolved |
| July 1, 2024 – September 30, 2024 | Monitoring, Regular | Diquat | — | Resolved |
| January 1, 2023 – December 31, 2023 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2023 – December 31, 2023 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2023 – December 31, 2023 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| September 28, 2022 – May 2, 2023 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| September 28, 2022 – May 2, 2023 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2022 – December 31, 2022 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| August 8, 2021 – May 2, 2023 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| March 17, 2021 – May 2, 2023 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| January 1, 2021 – December 31, 2021 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2021 – December 31, 2021 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2021 – December 31, 2021 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2021 – December 31, 2021 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2021 – December 31, 2021 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2021 – December 31, 2021 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2021 – December 31, 2021 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| October 1, 2020 – December 10, 2025 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| July 1, 2020 – September 30, 2020 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| October 1, 2018 – December 31, 2018 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| April 1, 2018 – June 30, 2018 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| January 1, 2018 – January 31, 2018 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| October 1, 2017 – March 21, 2018 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| January 1, 2017 – December 31, 2017 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2017 – December 31, 2019 | Monitoring, Regular | Fluoride | — | Archived |
| January 1, 2017 – December 31, 2017 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2017 – December 31, 2017 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2017 – December 31, 2017 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | 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 | CHLOROBENZENE | — | Resolved |
| January 1, 2015 – March 31, 2015 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2015 – March 31, 2015 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2015 – March 31, 2015 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2015 – March 31, 2015 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| October 1, 2014 – December 31, 2014 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| October 1, 2014 – December 31, 2014 | Monitoring, Regular | Toluene | — | Resolved |
| October 1, 2014 – December 31, 2014 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| October 1, 2014 – December 31, 2014 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| October 1, 2014 – December 31, 2014 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| July 1, 2012 – July 31, 2012 | Monitoring, Source Water (GWR) | E. COLI | — | Resolved |
| July 1, 2008 – March 23, 2011 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| July 1, 2007 – March 23, 2011 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- December 9, 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
- July 11, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- July 11, 2025State Violation/Reminder Noticegeneral 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 requested16 linked violations
- June 3, 2025State Violation/Reminder Notice30 linked violations
- March 12, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- March 6, 2025State Public Notification requested31 linked violations
- March 6, 2025State Violation/Reminder Notice31 linked violations
- November 22, 2024State Violation/Reminder Notice31 linked violations
- November 22, 2024State Public Notification requested30 linked violations
- September 26, 2024State Public Notification requested3 linked violations
- July 1, 2024State Compliance achieved24 linked violations
- July 1, 2024State Compliance achieved7 linked violations
- July 1, 2024State Compliance achieved24 linked violations
- July 1, 2024State Compliance achieved23 linked violations
- April 3, 2024State Administrative/Compliance Order without penalty issued54 linked violations
- February 28, 2024State Violation/Reminder Notice26 linked violations
- February 28, 2024State Public Notification requested27 linked violations
- August 30, 2023State Public Notification requested3 linked violations
- May 2, 2023State Compliance achieved4 linked violations
- May 2, 2023State Compliance achieved4 linked violations
- May 2, 2023State Compliance achieved5 linked violations
- April 4, 2023State Violation/Reminder Notice3 linked violations
- March 14, 2023State Violation/Reminder Notice24 linked violations
- March 14, 2023State Public Notification requested23 linked violations
- March 14, 2023State Violation/Reminder Notice3 linked violations
- February 22, 2023State Public Notification received4 linked violations
- February 22, 2023State Public Notification received6 linked violations
- February 22, 2023State Public Notification received26 linked violations
- February 22, 2023State Public Notification received13 linked violations
- October 19, 2022State Violation/Reminder Notice4 linked violations
- March 1, 2022State Violation/Reminder Notice54 linked violations
- March 1, 2022State Public Notification requested44 linked violations
- January 21, 2022State Violation/Reminder Notice6 linked violations
- December 30, 2021State Compliance achieved10 linked violations
- December 30, 2021State Compliance achieved27 linked violations
- November 16, 2021State Compliance achieved3 linked violations
- November 16, 2021State Compliance achieved5 linked violations
- November 16, 2021State Compliance achieved4 linked violations
- August 13, 2021State Violation/Reminder Notice4 linked violations
- November 6, 2020State Violation/Reminder Notice3 linked violations
- October 3, 2019State Compliance achieved4 linked violations
- September 26, 2019State Public Notification requested7 linked violations
- August 6, 2019State Compliance achieved4 linked violations
- February 25, 2019State Public Notification requested3 linked violations
- February 25, 2019State Violation/Reminder Notice3 linked violations
- January 18, 2019State Public Notification requested7 linked violations
- January 18, 2019State Compliance achieved4 linked violations
- December 14, 2018State Violation/Reminder Notice5 linked violations
- December 14, 2018State Public Notification requested4 linked violations
- September 14, 2018State Public Notification requested3 linked violations
- August 14, 2018State Public Notification requested1 linked violation
- July 28, 2018State Public Notification received24 linked violations
- July 23, 2018State Public Notification received2 linked violations
- July 23, 2018State Public Notification received3 linked violations
- July 23, 2018State Public Notification received1 linked violation
- July 23, 2018State Public Notification received2 linked violations
- 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 achieved2 linked violations
- March 21, 2018State Compliance achieved1 linked violation
- March 20, 2018State Administrative/Compliance Order without penalty issued50 linked violations
- February 20, 2018State Compliance achieved3 linked violations
- February 13, 2018State Public Notification requested22 linked violations
- February 13, 2018State Violation/Reminder Notice22 linked violations
- November 13, 2017State Public Notification requested2 linked violations
- November 13, 2017State Violation/Reminder Notice1 linked violation
- September 21, 2017State Violation/Reminder Notice9 linked violations
- July 26, 2016State Compliance achieved4 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
- June 16, 2015State Violation/Reminder Notice24 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
- February 12, 2009State Public Notification requested5 linked violations
- December 15, 2005State Compliance achieved25 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
Common questions
Is SENECA-CAYUGA NATION required to publish a Consumer Confidence Report?
- Yes. SENECA-CAYUGA NATION is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is SENECA-CAYUGA NATION’s next Consumer Confidence Report due?
- SENECA-CAYUGA NATION’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SENECA-CAYUGA NATION have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SENECA-CAYUGA NATION.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
Not on record
Phone not on record