TWIN LAKES UTILITIES

Iowa — Community Water System — PWSID: IA1300101

System Information

PWSID	IA1300101
System Name	TWIN LAKES UTILITIES
System Type	Community Water System
Water Source	Ground Water Purchased
Activity Status	Active
Owner Type	Private
EPA Region	07
Serves School	No
Wholesaler	No
First Reported	Feb 27, 1979
Last Reported	Dec 19, 2025

Location & Contact

State	Iowa
City	ROCKWELL CITY
ZIP Code	50568
Address	ATTN ROGER NETZ MANAGER
Organization	TWIN LAKES UTILITIES
Phone	712-297-8616

Population & Service

Population Served	300
Service Connections	400

Drinking Water Violations (74)

This water system has 74 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
Dec 1, 2023	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 1, 2024	Lead and Copper Rule
Dec 1, 2023	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Feb 1, 2024	Lead and Copper Rule
Mar 1, 2022	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Apr 29, 2022	Lead and Copper Rule
Mar 1, 2022	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Apr 29, 2022	Lead and Copper Rule
Mar 1, 2022	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Apr 29, 2022	Lead and Copper Rule
Mar 1, 2022	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Apr 29, 2022	Lead and Copper Rule
Mar 1, 2022	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Apr 29, 2022	Lead and Copper Rule
Mar 1, 2022	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Apr 29, 2022	Lead and Copper Rule
Mar 1, 2013	Mar 31, 2013	Nitrite	MCL	Yes	No	1.5 MG/L	1 mg/L	—	Resolved	Mar 31, 2013	Nitrate Rule
Mar 1, 2013	Mar 31, 2013	Nitrite	MCL	Yes	No	1.5 MG/L	1 mg/L	—	Resolved	Mar 31, 2013	Nitrate Rule
Mar 1, 2013	Mar 31, 2013	Nitrite	MCL	Yes	No	1.5 MG/L	1 mg/L	—	Resolved	Mar 31, 2013	Nitrate Rule
Mar 1, 2013	Mar 31, 2013	Nitrite	MCL	Yes	No	1.5 MG/L	1 mg/L	—	Resolved	Mar 31, 2013	Nitrate Rule
Dec 1, 2012	Dec 31, 2012	Nitrite	MCL	Yes	No	1.2 MG/L	1 mg/L	—	Resolved	Dec 31, 2012	Nitrate Rule
Dec 1, 2012	Dec 31, 2012	Nitrite	MCL	Yes	No	1.2 MG/L	1 mg/L	—	Resolved	Dec 31, 2012	Nitrate Rule
Dec 1, 2012	Dec 31, 2012	Nitrite	MCL	Yes	No	1.2 MG/L	1 mg/L	—	Resolved	Dec 31, 2012	Nitrate Rule
Dec 1, 2012	Dec 31, 2012	Nitrite	MCL	Yes	No	1.2 MG/L	1 mg/L	—	Resolved	Dec 31, 2012	Nitrate Rule
Nov 1, 2008	Nov 30, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2008	Total Coliform Rule
Nov 1, 2008	Nov 30, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2008	Total Coliform Rule
Nov 1, 2008	Nov 30, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2008	Total Coliform Rule
Nov 1, 2008	Nov 30, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2008	Total Coliform Rule
Nov 1, 2005	Nov 30, 2005	Nitrite	MCL	Yes	No	1.1	1 mg/L	—	Resolved	Nov 30, 2005	Nitrate Rule
Nov 1, 2005	Nov 30, 2005	Nitrite	MCL	Yes	No	1.1	1 mg/L	—	Resolved	Nov 30, 2005	Nitrate Rule
Nov 1, 2005	Nov 30, 2005	Nitrite	MCL	Yes	No	1.1	1 mg/L	—	Resolved	Nov 30, 2005	Nitrate Rule
Nov 1, 2005	Nov 30, 2005	Nitrite	MCL	Yes	No	1.1	1 mg/L	—	Resolved	Nov 30, 2005	Nitrate Rule
Jun 1, 2003	Jun 30, 2003	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jun 30, 2003	Nitrate Rule
Jun 1, 2003	Jun 30, 2003	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jun 30, 2003	Nitrate Rule
Jun 1, 2003	Jun 30, 2003	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jun 30, 2003	Nitrate Rule
Jun 1, 2003	Jun 30, 2003	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Jun 30, 2003	Nitrate Rule
Oct 1, 1998	Sep 30, 1999	Nitrite	MCL	Yes	No	2.8	1 mg/L	—	Resolved	Sep 30, 1999	Nitrate Rule
Oct 1, 1998	Sep 30, 1999	Nitrite	MCL	Yes	No	2.8	1 mg/L	—	Resolved	Sep 30, 1999	Nitrate Rule
Aug 1, 1998	Aug 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 1998	Total Coliform Rule
Aug 1, 1998	Aug 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 1998	Total Coliform Rule
Aug 1, 1998	Aug 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 1998	Total Coliform Rule
Aug 1, 1998	Aug 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 1998	Total Coliform Rule
Oct 1, 1995	Dec 31, 1995	Carbon tetrachloride	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1995	Volatile Organic Chemicals
Oct 1, 1995	Dec 31, 1995	Carbon tetrachloride	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1995	Volatile Organic Chemicals
Oct 1, 1995	Dec 31, 1995	Carbon tetrachloride	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1995	Volatile Organic Chemicals
Oct 1, 1995	Dec 31, 1995	Carbon tetrachloride	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1995	Volatile Organic Chemicals
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Jul 1, 1994	Sep 30, 1994	Nitrite	MCL	Yes	No	1.37	1 mg/L	—	Resolved	Sep 30, 1994	Nitrate Rule
Jul 1, 1994	Sep 30, 1994	Nitrite	MCL	Yes	No	1.37	1 mg/L	—	Resolved	Sep 30, 1994	Nitrate Rule
Jul 1, 1994	Sep 30, 1994	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Sep 30, 1994	Nitrate Rule
Jul 1, 1994	Sep 30, 1994	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Sep 30, 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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