DEFIANCE, OH · Defiance County

DEFIANCE CITY Water System

Current status

2 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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

System facts

System ID (PWSID): OH2000111
System type: Community Water System
Population served: 16,494
Service connections: 6,615
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2022 – September 30, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2022 – June 30, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2022 – March 31, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2021 – December 31, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2021 – September 30, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2021 – June 30, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2021 – March 31, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2020 – December 31, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2020 – September 30, 2020
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
TTHM
April 28, 2020 – May 11, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2020 – June 30, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2020 – March 31, 2020
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
December 24, 2019
Addressed
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2019 – December 31, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2019 – September 30, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2019 – June 30, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2019 – March 31, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2018 – December 31, 2018
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
September 14, 2018 – October 24, 2018
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
September 13, 2018
Addressed
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2018 – September 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2018 – June 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2018 – March 31, 2018
Resolved
WQP Entry Point/Tap Treatment Technique Non-Compliance
Health-based
Lead and Copper Rule
January 1, 2018 – June 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2017 – December 31, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2014 – September 30, 2014
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 2007 – April 30, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
May 1, 2006 – May 19, 2006
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2005 – December 31, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2005 – September 30, 2005
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2005 – May 31, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2005 – March 31, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2004 – December 31, 2004
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2004 – May 21, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2004 – September 30, 2004
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
June 1, 2003 – June 19, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2003 – June 30, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 2003 – January 31, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2003 – March 31, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
December 1, 2002 – December 31, 2002
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2002 – December 31, 2002
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2001 – May 21, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
May 1, 2001 – May 31, 2001
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
June 1, 2000 – June 14, 2000
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
February 1, 2000 – February 29, 2000
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
June 19, 1998 – June 24, 1998
Resolved
Monitoring, Regular
—
OXAMYL
May 1, 1998 – July 31, 1998
Resolved
Monitoring, Regular
—
BHC-GAMMA
May 1, 1998 – July 31, 1998
Resolved
Monitoring, Regular
—
Methoxychlor
May 1, 1998 – July 31, 1998
Resolved
Monitoring, Regular
—
Carbofuran
May 1, 1998 – July 31, 1998
Resolved
Monitoring, Regular
—
Endothall
May 1, 1998 – July 31, 1998
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 1998 – April 30, 1998
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 1993 – December 31, 1993
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 1993 – November 30, 1993
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 1986 – June 30, 1986
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
October 1, 1984 – September 30, 1985
Resolved

Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmationArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2022 – September 30, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2022 – June 30, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2021 – September 30, 2021	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2021 – June 30, 2021	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2021 – March 31, 2021	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2020 – December 31, 2020	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2020 – September 30, 2020	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 28, 2020 – May 11, 2020	Failure Submit IDSE/Subpart V Plan Rpt	TTHM	—	Resolved
April 1, 2020 – June 30, 2020	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2020 – March 31, 2020	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
December 24, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Addressed
October 1, 2019 – December 31, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2019 – September 30, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2019 – June 30, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2019 – March 31, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2018 – December 31, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
September 14, 2018 – October 24, 2018	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
September 13, 2018	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Addressed
July 1, 2018 – September 30, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2018 – June 30, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2018 – March 31, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2018 – June 30, 2018	WQP Entry Point/Tap Treatment Technique Non-Compliance	Lead and Copper Rule	Health-based	Resolved
October 1, 2017 – December 31, 2017	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2007 – April 30, 2007	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
May 1, 2006 – May 19, 2006	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
October 1, 2005 – December 31, 2005	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2005 – September 30, 2005	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
May 1, 2005 – May 31, 2005	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2005 – June 30, 2005	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2005 – March 31, 2005	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2004 – December 31, 2004	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2004 – May 21, 2007	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2004 – September 30, 2004	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
June 1, 2003 – June 19, 2003	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
April 1, 2003 – June 30, 2003	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2003 – January 31, 2003	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
January 1, 2003 – March 31, 2003	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
December 1, 2002 – December 31, 2002	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
October 1, 2002 – December 31, 2002	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2001 – May 21, 2007	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
May 1, 2001 – May 31, 2001	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
June 1, 2000 – June 14, 2000	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
February 1, 2000 – February 29, 2000	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
June 19, 1998 – June 24, 1998	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
May 1, 1998 – July 31, 1998	Monitoring, Regular	OXAMYL	—	Resolved
May 1, 1998 – July 31, 1998	Monitoring, Regular	BHC-GAMMA	—	Resolved
May 1, 1998 – July 31, 1998	Monitoring, Regular	Methoxychlor	—	Resolved
May 1, 1998 – July 31, 1998	Monitoring, Regular	Carbofuran	—	Resolved
May 1, 1998 – July 31, 1998	Monitoring, Regular	Endothall	—	Resolved
April 1, 1998 – April 30, 1998	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
December 1, 1993 – December 31, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
November 1, 1993 – November 30, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 1986 – June 30, 1986	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
October 1, 1984 – September 30, 1985	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved

Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmationArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

October 11, 2022State Compliance achieved22 linked violations
August 8, 2022State Public Notification requested2 linked violations
August 8, 2022State Violation/Reminder Notice3 linked violations
February 7, 2022State Public Notification requested2 linked violations
February 7, 2022State Violation/Reminder Notice2 linked violations
December 8, 2021State Public Notification received3 linked violations
November 15, 2021State Public Notification requested3 linked violations
August 9, 2021State Violation/Reminder Notice57 linked violations
May 17, 2021State Public Notification requested4 linked violations
February 8, 2021State Public Notification requested9 linked violations
December 15, 2020State Public Notification received3 linked violations
November 17, 2020State Violation/Reminder Notice3 linked violations
September 1, 2020State Public Notification received4 linked violations
August 11, 2020State Violation/Reminder Notice5 linked violations
June 5, 2020State Public Notification received5 linked violations
May 19, 2020State Administrative/Compliance Order with penalty issued32 linked violations
May 11, 2020State Public Notification requested2 linked violations
May 11, 2020State Violation/Reminder Notice2 linked violations
February 21, 2020State Public Notification received2 linked violations
December 13, 2019State Public Notification received2 linked violations
November 13, 2019State Public Notification requested2 linked violations
November 13, 2019State Violation/Reminder Notice2 linked violations
August 13, 2019State Violation/Reminder Notice3 linked violations
May 13, 2019State Public Notification requested3 linked violations
February 12, 2019State Violation/Reminder Notice3 linked violations
January 4, 2019State Administrative/Compliance Order without penalty issued11 linked violations
November 14, 2018State Violation/Reminder Notice2 linked violations
November 14, 2018State Public Notification requested2 linked violations
October 24, 2018State Compliance achieved3 linked violations
June 5, 2018State Violation/Reminder Notice3 linked violations
May 14, 2018State Public Notification requested2 linked violations
March 12, 2018State Public Notification received4 linked violations
December 31, 2017State Compliance achieved5 linked violations
December 20, 2017State Public Notification received5 linked violations
November 14, 2017State Violation/Reminder Notice3 linked violations
August 11, 2017State Violation/Reminder Notice2 linked violations
July 16, 2016State Public Notification received4 linked violations
August 17, 2015State Compliance achieved2 linked violations
August 14, 2015State Violation/Reminder Notice4 linked violations
July 18, 2014State Public Notification received4 linked violations
May 14, 2014State Violation/Reminder Notice3 linked violations
February 18, 2014State Violation/Reminder Notice2 linked violations
January 14, 2014State Compliance achieved5 linked violations
November 18, 2013State Violation/Reminder Notice2 linked violations
November 18, 2013State Public Notification requested3 linked violations
April 22, 2008Federal Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 20, 2007Federal issued Formal Notice of Violationgeneral compliance action — not tied to a specific violation on record
May 30, 2006State Administrative/Compliance Order with penalty issued22 linked violations
May 30, 2006State Administrative/Compliance Order with penalty issued43 linked violations
July 1, 2005State Public Notification requested5 linked violations
June 30, 2005State Public Notification received3 linked violations
May 25, 2005State Public Notification received5 linked violations
October 8, 2003State Compliance achieved11 linked violations
February 4, 2003State Compliance achieved2 linked violations
January 1, 2001State no longer subject to Rule2 linked violations
June 14, 2000State Public Notification requested3 linked violations
January 27, 2000Federal issued Formal Notice of Violation3 linked violations
June 6, 1999State Compliance achieved3 linked violations
February 12, 1999State Public Notification requested182 linked violations
June 12, 1986State Public Notification received1 linked violation
June 25, 1985State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 7, 1983State Public Notification receivedgeneral compliance action — not tied to a specific violation on record

Contact

MACK, RYAN

419-784-2201

DEFIANCE, OH 43512-2779