Is WARREN COUNTY required to publish a Consumer Confidence Report?

Yes. WARREN COUNTY 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 WARREN COUNTY’s next Consumer Confidence Report due?

WARREN COUNTY’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.

OH · Warren County

WARREN COUNTY Water System

Consumer Confidence Report status

WARREN COUNTY 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 1 item for WARREN COUNTY that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

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 Ohio’s official records. Always confirm current status with Ohio before making decisions based on this information.

System facts

System ID (PWSID): OH8301512
System type: Community Water System
Population served: 81,975
Service connections: 30,361
Ownership: local government
Water source: groundwater (wells)

WARREN COUNTY is one of 180 community water systems in Ohio in the 10,001 to 100,000 people size category, serving 81,975 people from groundwater.

As of August 1, 2026, its federal record holds 36 entries between 1986 and 2024, of which 1 remains open; none are health-based.

Of the 36, 33 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 inorganic chemicals, synthetic organic chemicals, and the Consumer Confidence Rule.

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
September 5, 2024 – October 25, 2024
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 17, 2022 – December 8, 2022
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
November 9, 2018
Unaddressed
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
2,4-D
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Endothall
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Diquat
January 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Beryllium, Total
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Thallium, Total
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Selenium
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Asbestos
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Nitrate
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Arsenic
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Barium
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Cadmium
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Chromium
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
CYANIDE
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Fluoride
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Mercury
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Nickel
July 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
Antimony, Total
July 1, 1995 – December 31, 1995
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 1992 – December 31, 1992
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 1992 – January 15, 1992
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 1992 – January 15, 1992
Resolved
Monitoring, Regular
—
Endrin
January 1, 1992 – January 15, 1992
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 1992 – January 15, 1992
Resolved
Monitoring, Regular
—
Barium
October 22, 1986 – October 21, 1989
Resolved
Monitoring, Regular
—
Cadmium
October 22, 1986 – October 21, 1989
Resolved
Monitoring, Regular
—
Chromium
October 22, 1986 – October 21, 1989
Resolved
Monitoring, Regular
—
Fluoride
October 22, 1986 – October 21, 1989
Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Period	Violation	Contaminant / rule	Health-based	Status
September 5, 2024 – October 25, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
August 17, 2022 – December 8, 2022	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
November 9, 2018	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Unaddressed
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 1997 – March 31, 1997	Monitoring, Regular	2,4-D	—	Resolved
January 1, 1997 – March 31, 1997	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 1997 – March 31, 1997	Monitoring, Regular	Endothall	—	Resolved
January 1, 1997 – March 31, 1997	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 1997 – March 31, 1997	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 1997 – March 31, 1997	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 1997 – March 31, 1997	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 1997 – March 31, 1997	Monitoring, Regular	Diquat	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Beryllium, Total	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Thallium, Total	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Selenium	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Asbestos	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Nitrate	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Arsenic	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Barium	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Cadmium	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Chromium	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	CYANIDE	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Fluoride	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Mercury	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Nickel	—	Resolved
July 1, 1995 – December 31, 1995	Monitoring, Regular	Antimony, Total	—	Resolved
July 1, 1992 – December 31, 1992	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 1992 – January 15, 1992	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 1992 – January 15, 1992	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 1992 – January 15, 1992	Monitoring, Regular	Endrin	—	Resolved
January 1, 1992 – January 15, 1992	Monitoring, Regular	2,4,5-TP	—	Resolved
October 22, 1986 – October 21, 1989	Monitoring, Regular	Barium	—	Resolved
October 22, 1986 – October 21, 1989	Monitoring, Regular	Cadmium	—	Resolved
October 22, 1986 – October 21, 1989	Monitoring, Regular	Chromium	—	Resolved
October 22, 1986 – October 21, 1989	Monitoring, Regular	Fluoride	—	Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is WARREN COUNTY required to publish a Consumer Confidence Report?: Yes. WARREN COUNTY 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 WARREN COUNTY’s next Consumer Confidence Report due?: WARREN COUNTY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does WARREN COUNTY have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 item for WARREN COUNTY that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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