Is OWASSO required to publish a Consumer Confidence Report?

Yes. OWASSO 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 OWASSO’s next Consumer Confidence Report due?

OWASSO’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.

OWASSO, OK · Tulsa County

OWASSO Water System

Consumer Confidence Report status

OWASSO 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 OWASSO.

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): OK3007218
System type: Community Water System
Population served: 23,000
Service connections: 10,468
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

OWASSO is among the 25 largest community water systems in Oklahoma, serving 23,000 people from surface water.

As of August 1, 2026, its federal record holds 14 entries between 1992 and 2024, all of which EPA lists as closed.

Of the 14, 9 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 Total Coliform Rules, the Lead and Copper Rule, and the Stage 2 Disinfectants and Disinfection Byproducts Rule.

Violation history

LSL Reporting
—
LEAD AND COPPER RULE REVISIONS
October 17, 2024 – July 15, 2025
Resolved
LSL Inventory
Health-based
LEAD AND COPPER RULE REVISIONS
October 17, 2024 – July 15, 2025
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2016 – March 21, 2018
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 2013 – February 28, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2011 – October 31, 2011
Resolved
Monitoring, Routine (IDSE)
—
TTHM
December 1, 2007 – January 31, 2008
Resolved
Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
December 1, 2007 – January 31, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2004 – November 30, 2004
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
September 1, 2004 – September 30, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2003 – September 30, 2003
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1996 – September 30, 1996
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
March 1, 1994 – March 31, 1994
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 1993 – August 31, 1993
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 1992 – June 30, 1992
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 17, 2024 – July 15, 2025	LSL Reporting	LEAD AND COPPER RULE REVISIONS	—	Resolved
October 17, 2024 – July 15, 2025	LSL Inventory	LEAD AND COPPER RULE REVISIONS	Health-based	Resolved
October 1, 2016 – March 21, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
February 1, 2013 – February 28, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2011 – October 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
December 1, 2007 – January 31, 2008	Monitoring, Routine (IDSE)	TTHM	—	Resolved
December 1, 2007 – January 31, 2008	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
November 1, 2004 – November 30, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2004 – September 30, 2004	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2003 – September 30, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 1996 – September 30, 1996	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
March 1, 1994 – March 31, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
August 1, 1993 – August 31, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 1992 – June 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

February 20, 2015State Compliance achieved2 linked violations

Common questions

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

OWASSO

918-272-4959

OWASSO, OK 74055