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DEFIANCE CITY

Ohio — Community Water System — PWSID: OH2000111

System Information

PWSIDOH2000111
System NameDEFIANCE CITY
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedJan 30, 1981
Last ReportedNov 17, 2025

Location & Contact

StateOhio
CityDEFIANCE
ZIP Code43512-2779
AddressCity of Defiance
OrganizationMACK, RYAN
Phone419-784-2201

Population & Service

Population Served16,494
Service Connections6,615

Drinking Water Violations (385)

This water system has 385 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .104 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .104 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .104 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .104 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .104 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .105 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .105 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .105 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .105 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .105 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .105 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2021 Sep 30, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Sep 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2021 Sep 30, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Sep 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2021 Sep 30, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Sep 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2021 Sep 30, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Sep 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2021 Sep 30, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Sep 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2021 Sep 30, 2021 TTHM MCL Yes No .106 MG/L 0.080 mg/L .08 Resolved Sep 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 Jun 30, 2021 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Jun 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 Jun 30, 2021 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Jun 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 Jun 30, 2021 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Jun 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 Jun 30, 2021 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Jun 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 Jun 30, 2021 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Jun 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 Jun 30, 2021 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Jun 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Mar 31, 2021 TTHM MCL Yes No .097 MG/L 0.080 mg/L .08 Resolved Mar 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Mar 31, 2021 TTHM MCL Yes No .097 MG/L 0.080 mg/L .08 Resolved Mar 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Mar 31, 2021 TTHM MCL Yes No .097 MG/L 0.080 mg/L .08 Resolved Mar 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Mar 31, 2021 TTHM MCL Yes No .097 MG/L 0.080 mg/L .08 Resolved Mar 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Mar 31, 2021 TTHM MCL Yes No .097 MG/L 0.080 mg/L .08 Resolved Mar 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Mar 31, 2021 TTHM MCL Yes No .097 MG/L 0.080 mg/L .08 Resolved Mar 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .091 MG/L 0.080 mg/L .08 Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .091 MG/L 0.080 mg/L .08 Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .091 MG/L 0.080 mg/L .08 Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .091 MG/L 0.080 mg/L .08 Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .091 MG/L 0.080 mg/L .08 Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .091 MG/L 0.080 mg/L .08 Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .09 MG/L 0.080 mg/L .08 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .09 MG/L 0.080 mg/L .08 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .09 MG/L 0.080 mg/L .08 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .09 MG/L 0.080 mg/L .08 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .09 MG/L 0.080 mg/L .08 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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