Is GRAND LAKE PWA required to publish a Consumer Confidence Report?

Yes. GRAND LAKE PWA 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 GRAND LAKE PWA’s next Consumer Confidence Report due?

GRAND LAKE PWA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

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.

OCHELATA, OK · Delaware County

GRAND LAKE PWA Water System

Consumer Confidence Report status

GRAND LAKE PWA 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 GRAND LAKE PWA.

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): OK1021691
System type: Community Water System
Population served: 2,800
Service connections: 1,327
Ownership: local government
Water source: groundwater (wells)

GRAND LAKE PWA is one of 511 community water systems in Oklahoma in the 501 to 3,300 people size category, serving 2,800 people from groundwater.

As of August 1, 2026, its federal record holds 68 entries between 1994 and 2025, all of which EPA lists as closed.

Of the 68, 39 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 the Stage 1 Disinfectants and Disinfection Byproducts Rule, the Radionuclides and Revised Rad Rule, and the Surface Water Treatment Rules.

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2025 – September 30, 2025
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2024 – July 11, 2025
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2024 – March 31, 2024
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 2, 2023 – July 11, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2023 – December 31, 2023
Archived
Monitoring, Regular
—
Combined Uranium
April 1, 2022 – June 30, 2022
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
April 1, 2022 – June 30, 2022
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2022 – June 30, 2022
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2022 – June 30, 2022
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2022 – March 31, 2022
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
January 1, 2022 – March 31, 2022
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2022 – March 31, 2022
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2022 – March 31, 2022
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 20, 2020 – December 8, 2022
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2018 – October 31, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017 – June 30, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – March 6, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2015 – August 31, 2015
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
January 1, 2014 – March 31, 2014
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2013 – December 31, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2013 – September 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2013 – September 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2013 – June 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2013 – June 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2013 – March 31, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2013 – March 31, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2012 – December 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2012 – December 31, 2012
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2012 – December 31, 2012
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2012 – September 30, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2012 – September 30, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2012 – September 30, 2012
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – March 21, 2016
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2012 – June 30, 2012
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 2010 – October 31, 2010
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
October 1, 2009 – December 31, 2009
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2009 – February 27, 2012
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Routine (IDSE)
—
TTHM
February 1, 2009 – April 30, 2009
Resolved
Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
February 1, 2009 – April 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2009 – March 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2009 – March 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2008 – December 31, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2008 – February 27, 2012
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2008 – March 31, 2008
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2007 – September 30, 2007
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2007 – February 27, 2012
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2007 – December 31, 2007
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – February 27, 2012
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
September 1, 2005 – September 30, 2005
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2005 – March 31, 2005
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2004 – December 31, 2004
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2004 – November 30, 2004
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2004 – September 30, 2004
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 2004 – July 31, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2004 – June 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
January 1, 2004 – March 31, 2004
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2004 – January 31, 2004
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
October 1, 2002 – October 31, 2002
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2002 – September 30, 2002
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2002 – September 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1997 – July 31, 1997
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1994 – July 31, 1994
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 – September 30, 2025	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Archived
October 1, 2024 – July 11, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2024 – March 31, 2024	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 2, 2023 – July 11, 2023	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
October 1, 2023 – December 31, 2023	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Archived
April 1, 2022 – June 30, 2022	Monitoring, Regular	Combined Uranium	—	Resolved
April 1, 2022 – June 30, 2022	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
April 1, 2022 – June 30, 2022	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2022 – June 30, 2022	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2022 – March 31, 2022	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2022 – March 31, 2022	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
January 1, 2022 – March 31, 2022	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2022 – March 31, 2022	Monitoring, Regular	Combined Uranium	—	Resolved
October 20, 2020 – December 8, 2022	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2018 – October 31, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2017 – June 30, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2016 – March 6, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2015 – August 31, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2014 – March 31, 2014	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
October 1, 2013 – December 31, 2013	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
July 1, 2013 – September 30, 2013	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2013 – September 30, 2013	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
April 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2013 – March 31, 2013	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2013 – March 31, 2013	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2012 – December 31, 2012	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2012 – December 31, 2012	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2012 – December 31, 2012	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
July 1, 2012 – September 30, 2012	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
July 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2012 – March 21, 2016	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2012 – June 30, 2012	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
October 1, 2010 – October 31, 2010	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2009 – February 27, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
February 1, 2009 – April 30, 2009	Monitoring, Routine (IDSE)	TTHM	—	Resolved
February 1, 2009 – April 30, 2009	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2009 – March 31, 2009	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
September 1, 2008 – September 30, 2008	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2008 – February 27, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
September 1, 2007 – September 30, 2007	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2007 – February 27, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2007 – December 31, 2007	Monitoring, Regular	Arsenic	—	Resolved
July 1, 2006 – February 27, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
September 1, 2005 – September 30, 2005	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
June 1, 2005 – June 30, 2005	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
January 1, 2005 – March 31, 2005	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
December 1, 2004 – December 31, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
November 1, 2004 – November 30, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2004 – September 30, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2004 – July 31, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
April 1, 2004 – June 30, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2004 – March 31, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Archived
January 1, 2004 – January 31, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2002 – October 31, 2002	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2002 – September 30, 2002	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2002 – September 30, 2002	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 1997 – July 31, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1994 – July 31, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

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

Enforcement actions

November 18, 2025State Public Notification requested4 linked violations
July 11, 2025State Compliance achieved5 linked violations
June 19, 2024State Public Notification requested5 linked violations
January 4, 2024State Public Notification requested6 linked violations
July 11, 2023State Compliance achieved4 linked violations
September 14, 2022State Compliance achieved11 linked violations
August 30, 2022State Public Notification requested7 linked violations
May 25, 2022State Violation/Reminder Notice7 linked violations
September 19, 2018State Public Notification received4 linked violations
November 17, 2017State Violation/Reminder Notice2 linked violations
July 26, 2016State Compliance achieved4 linked violations
July 26, 2016State Compliance achieved3 linked violations
July 26, 2016State Compliance achieved7 linked violations
July 26, 2016State Compliance achieved4 linked violations
October 12, 2015State Violation/Reminder Notice10 linked violations
October 13, 2014State no longer subject to Rule27 linked violations
June 20, 2014State Public Notification requested4 linked violations
May 8, 2014State Compliance achieved1 linked violation
May 8, 2014State Compliance achieved1 linked violation
April 7, 2010State Public Notification received7 linked violations
February 12, 2010State Compliance achieved8 linked violations
July 27, 2009State Compliance achieved11 linked violations
May 29, 2009State Administrative/Compliance Order with penalty issued8 linked violations
March 30, 2009State Public Notification requested22 linked violations
January 23, 2008State Public Notification requested43 linked violations
October 22, 2007State Public Notification requested6 linked violations
October 3, 2006State Compliance achieved23 linked violations
February 3, 2005State Public Notification received9 linked violations
February 3, 2005State Public Notification received17 linked violations
February 3, 2005State Public Notification received7 linked violations

Common questions

Is GRAND LAKE PWA required to publish a Consumer Confidence Report?: Yes. GRAND LAKE PWA 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 GRAND LAKE PWA’s next Consumer Confidence Report due?: GRAND LAKE PWA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does GRAND LAKE PWA have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for GRAND LAKE PWA.
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

GRAND LAKE PWA

918-535-2302

OCHELATA, OK 74051