DOW CITY WATER WORKS

Iowa — Community Water System — PWSID: IA2427049

System Information

PWSID	IA2427049
System Name	DOW CITY WATER WORKS
System Type	Community Water System
Water Source	Ground Water
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	DOW CITY
ZIP Code	51528
Address	ATTN WATER SUPT
Organization	DOW CITY WATER WORKS
Phone	712-674-3350

Population & Service

Population Served	467
Service Connections	255

Drinking Water Violations (78)

This water system has 78 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
May 1, 2020	May 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	May 31, 2020	Nitrate Rule
May 1, 2020	May 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	May 31, 2020	Nitrate Rule
May 1, 2020	May 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	May 31, 2020	Nitrate Rule
May 1, 2020	May 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	May 31, 2020	Nitrate Rule
Jan 1, 2020	Jan 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jan 31, 2020	Nitrate Rule
Jan 1, 2020	Jan 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jan 31, 2020	Nitrate Rule
Jan 1, 2020	Jan 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jan 31, 2020	Nitrate Rule
Jan 1, 2020	Jan 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jan 31, 2020	Nitrate Rule
Nov 1, 2019	Nov 30, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Nov 30, 2019	Revised Total Coliform Rule
Nov 1, 2019	Nov 30, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Nov 30, 2019	Revised Total Coliform Rule
Nov 1, 2019	Nov 30, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Nov 30, 2019	Revised Total Coliform Rule
Nov 1, 2019	Nov 30, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Nov 30, 2019	Revised Total Coliform Rule
Nov 1, 2019	Nov 30, 2019	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Nov 30, 2019	Nitrate Rule
Nov 1, 2019	Nov 30, 2019	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Nov 30, 2019	Nitrate Rule
Nov 1, 2019	Nov 30, 2019	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Nov 30, 2019	Nitrate Rule
Nov 1, 2019	Nov 30, 2019	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Nov 30, 2019	Nitrate Rule
Oct 1, 2016	Oct 31, 2016	Nitrate	MCL	Yes	No	12 MG/L	10 mg/L	—	Resolved	Oct 31, 2016	Nitrate Rule
Oct 1, 2016	Oct 31, 2016	Nitrate	MCL	Yes	No	12 MG/L	10 mg/L	—	Resolved	Oct 31, 2016	Nitrate Rule
Oct 1, 2016	Oct 31, 2016	Nitrate	MCL	Yes	No	12 MG/L	10 mg/L	—	Resolved	Oct 31, 2016	Nitrate Rule
Oct 1, 2016	Oct 31, 2016	Nitrate	MCL	Yes	No	12 MG/L	10 mg/L	—	Resolved	Oct 31, 2016	Nitrate Rule
Nov 1, 2004	Nov 30, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2004	Total Coliform Rule
Nov 1, 2004	Nov 30, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2004	Total Coliform Rule
Nov 1, 2004	Nov 30, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2004	Total Coliform Rule
Nov 1, 2004	Nov 30, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2004	Total Coliform Rule
Oct 1, 1999	Dec 31, 1999	Nitrate	MCL	Yes	No	11	10 mg/L	—	Resolved	Dec 31, 1999	Nitrate Rule
Oct 1, 1999	Dec 31, 1999	Nitrate	MCL	Yes	No	11	10 mg/L	—	Resolved	Dec 31, 1999	Nitrate Rule
Oct 1, 1999	Dec 31, 1999	Nitrate	MCL	Yes	No	11	10 mg/L	—	Resolved	Dec 31, 1999	Nitrate Rule
Oct 1, 1999	Dec 31, 1999	Nitrate	MCL	Yes	No	11	10 mg/L	—	Resolved	Dec 31, 1999	Nitrate Rule
Oct 1, 1999	Dec 31, 1999	Nitrate	MCL	Yes	No	11	10 mg/L	—	Resolved	Dec 31, 1999	Nitrate Rule
Jul 1, 1996	Jul 31, 1996	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jul 31, 1996	Total Coliform Rule
Jul 1, 1996	Jul 31, 1996	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jul 31, 1996	Total Coliform Rule
Jul 1, 1996	Jul 31, 1996	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jul 31, 1996	Total Coliform Rule
Feb 1, 1996	Feb 29, 1996	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Feb 29, 1996	Total Coliform Rule
Feb 1, 1996	Feb 29, 1996	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Feb 29, 1996	Total Coliform Rule
Feb 1, 1996	Feb 29, 1996	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Feb 29, 1996	Total Coliform Rule
Jan 1, 1995	Jan 31, 1995	1,2,4-Trichlorobenzene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jan 31, 1995	Volatile Organic Chemicals
Jan 1, 1995	Jan 31, 1995	1,2,4-Trichlorobenzene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jan 31, 1995	Volatile Organic Chemicals
Jan 1, 1995	Jan 31, 1995	1,2,4-Trichlorobenzene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jan 31, 1995	Volatile Organic Chemicals
Jan 1, 1995	Jan 31, 1995	1,2,4-Trichlorobenzene	MR	No	Yes	—	0.07 mg/L	—	Resolved	Jan 31, 1995	Volatile Organic Chemicals
Jan 1, 1995	Jan 31, 1995	BHC-GAMMA	MR	No	Yes	—	0.0002 mg/L	—	Resolved	Jan 31, 1995	Synthetic Organic Chemicals
Jan 1, 1995	Jan 31, 1995	BHC-GAMMA	MR	No	Yes	—	0.0002 mg/L	—	Resolved	Jan 31, 1995	Synthetic Organic Chemicals
Jan 1, 1995	Jan 31, 1995	BHC-GAMMA	MR	No	Yes	—	0.0002 mg/L	—	Resolved	Jan 31, 1995	Synthetic Organic Chemicals
Jan 1, 1995	Jan 31, 1995	BHC-GAMMA	MR	No	Yes	—	0.0002 mg/L	—	Resolved	Jan 31, 1995	Synthetic Organic Chemicals
Jan 1, 1994	Jan 31, 1994	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jan 31, 1994	Nitrate Rule
Jan 1, 1994	Jan 31, 1994	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jan 31, 1994	Nitrate Rule
Jan 1, 1994	Jan 31, 1994	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jan 31, 1994	Nitrate Rule
Jan 1, 1994	Jan 31, 1994	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jan 31, 1994	Nitrate Rule
Jan 1, 1994	Jan 31, 1994	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jan 31, 1994	Nitrate Rule
Apr 1, 1993	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	Nitrate Rule
Apr 1, 1993	Mar 31, 1994	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 1994	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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