COLFAX WATER SUPPLY

Iowa — Community Water System — PWSID: IA5009056

System Information

PWSID	IA5009056
System Name	COLFAX WATER SUPPLY
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	COLFAX
ZIP Code	50054
Address	ATTN PUBLIC WORKS DIR: MARK EARLES
Organization	COLFAX WATER SUPPLY
Phone	515-674-3829

Population & Service

Population Served	2,305
Service Connections	938

Drinking Water Violations (57)

This water system has 57 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, 2011	Sep 30, 2011		Other	No	No	—	—	—	Resolved	Sep 30, 2011	Miscellaneous Other Rules
Jul 1, 2011	Sep 30, 2011		Other	No	No	—	—	—	Resolved	Sep 30, 2011	Miscellaneous Other Rules
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Jul 1, 2010	Aug 31, 2012	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Aug 31, 2012	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010	Aug 31, 2012	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Aug 31, 2012	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010	Aug 31, 2012	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Aug 31, 2012	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010	Aug 31, 2012	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Aug 31, 2012	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010	Aug 31, 2012	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Aug 31, 2012	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010	Aug 31, 2012	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Aug 31, 2012	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010	Aug 31, 2012	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Aug 31, 2012	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010	Aug 31, 2012	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Aug 31, 2012	Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2008	May 31, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2008	Total Coliform Rule
May 1, 2008	May 31, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2008	Total Coliform Rule
May 1, 2008	May 31, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2008	Total Coliform Rule
May 1, 2008	May 31, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2008	Total Coliform Rule
Jul 1, 2006	Jun 30, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jun 30, 2007	Nitrate Rule
Jul 1, 2006	Jun 30, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jun 30, 2007	Nitrate Rule
Jul 1, 2006	Jun 30, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jun 30, 2007	Nitrate Rule
Jul 1, 2006	Jun 30, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jun 30, 2007	Nitrate Rule
Jul 1, 2006	Jun 30, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jun 30, 2007	Nitrate Rule
Jul 1, 2006	Jun 30, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jun 30, 2007	Nitrate Rule
Jul 1, 2006	Jun 30, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jun 30, 2007	Nitrate Rule
Jul 1, 2006	Jun 30, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Jun 30, 2007	Nitrate Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 20, 2006	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 20, 2006	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 20, 2006	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 20, 2006	Lead and Copper Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
Mar 1, 1994	Mar 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 1994	Total Coliform Rule
Mar 1, 1994	Mar 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 1994	Total Coliform Rule
Mar 1, 1994	Mar 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 1994	Total Coliform Rule
Mar 1, 1994	Mar 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 1994	Total Coliform Rule
Mar 1, 1994	Mar 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 1994	Total Coliform Rule
Mar 1, 1994	Mar 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 1994	Total Coliform Rule
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—

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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