CHARTER OAK WATER SUPPLY

Iowa — Community Water System — PWSID: IA2417018

System Information

PWSID	IA2417018
System Name	CHARTER OAK WATER SUPPLY
System Type	Community Water System
Water Source	Ground Water Purchased
Activity Status	Active
Owner Type	Local
EPA Region	07
Serves School	No
Wholesaler	No
First Reported	Feb 27, 1979
Last Reported	Dec 19, 2025

Location & Contact

State	Iowa
City	CHARTER OAK
ZIP Code	51439
Address	ATTN CRAIG WARNOCK WATER SUPT
Organization	CHARTER OAK WATER SUPPLY
Phone	712-269-1106

Population & Service

Population Served	522
Service Connections	306

Drinking Water Violations (182)

This water system has 182 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, 2019	Jul 31, 2019	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Jul 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019	Jul 31, 2019	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Jul 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019	Jul 31, 2019	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Jul 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019	Jul 31, 2019	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Jul 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019	Jul 31, 2019	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Jul 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019	Jul 31, 2019	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Jul 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019	Jul 31, 2019	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Jul 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019	Jul 31, 2019	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Jul 31, 2019	Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2014	Nov 30, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2014	Total Coliform Rule
Nov 1, 2014	Nov 30, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2014	Total Coliform Rule
Nov 1, 2014	Nov 30, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2014	Total Coliform Rule
Nov 1, 2014	Nov 30, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2014	Total Coliform Rule
May 1, 2003	May 31, 2003	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2003	Total Coliform Rule
May 1, 2003	May 31, 2003	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2003	Total Coliform Rule
May 1, 2003	May 31, 2003	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2003	Total Coliform Rule
Jun 1, 2002	Jun 30, 2002	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2002	Total Coliform Rule
Jun 1, 2002	Jun 30, 2002	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2002	Total Coliform Rule
Jun 1, 2002	Jun 30, 2002	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2002	Total Coliform Rule
Jun 1, 2002	Jun 30, 2002	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2002	Total Coliform Rule
Jun 1, 2002	Jun 30, 2002	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2002	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
May 1, 2001	May 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2001	Total Coliform Rule
Nov 1, 1995	Nov 30, 1995	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 1995	Total Coliform Rule
Nov 1, 1995	Nov 30, 1995	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 1995	Total Coliform Rule
Nov 1, 1995	Nov 30, 1995	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 1995	Total Coliform Rule
Jan 1, 1994	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Jan 1, 1994	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Jan 1, 1994	Mar 31, 1994	Benzene	MCL	Yes	No	.085	0.005 mg/L	—	Resolved	Mar 31, 1994	Volatile Organic Chemicals
Jan 1, 1994	Mar 31, 1994	Benzene	MCL	Yes	No	.085	0.005 mg/L	—	Resolved	Mar 31, 1994	Volatile Organic Chemicals
Jan 1, 1994	Mar 31, 1994	Benzene	MCL	Yes	No	.085	0.005 mg/L	—	Resolved	Mar 31, 1994	Volatile Organic Chemicals
Jan 1, 1994	Mar 31, 1994	Benzene	MCL	Yes	No	.085	0.005 mg/L	—	Resolved	Mar 31, 1994	Volatile Organic Chemicals
Jan 1, 1994	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Jan 1, 1994	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Jan 1, 1994	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Jan 1, 1994	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Jan 1, 1994	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Jan 1, 1994	Mar 31, 1994	Benzene	MCL	Yes	No	.085	0.005 mg/L	—	Resolved	Mar 31, 1994	Volatile Organic Chemicals
Jan 1, 1994	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Jan 1, 1994	Mar 31, 1994	Benzene	MCL	Yes	No	.085	0.005 mg/L	—	Resolved	Mar 31, 1994	Volatile Organic Chemicals
Jan 1, 1994	Mar 31, 1994	Benzene	MCL	Yes	No	.085	0.005 mg/L	—	Resolved	Mar 31, 1994	Volatile Organic Chemicals
Jan 1, 1994	Mar 31, 1994	Benzene	MCL	Yes	No	.085	0.005 mg/L	—	Resolved	Mar 31, 1994	Volatile Organic Chemicals
Oct 1, 1993	Dec 31, 1993	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1993	Nitrate Rule
Oct 1, 1993	Dec 31, 1993	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1993	Nitrate 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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