WINTERSET, IA · Madison County

WINTERSET MUNICIPAL WATERWORKS Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Iowa’s official records. Always confirm current status with Iowa before making decisions based on this information.

System facts

System ID (PWSID): IA6171029
System type: Community Water System
Population served: 5,428
Service connections: 2,600
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2007 – March 31, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2006 – December 31, 2006
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2006 – September 30, 2006
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 2005 – May 31, 2005
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 2001 – June 30, 2001
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 2001 – May 31, 2001
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 2001 – April 30, 2001
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 1999 – June 30, 1999
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1994 – June 30, 1998
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 1991 – June 30, 1991
Resolved
Monitoring, Regular
—
Endrin
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
BHC-GAMMA
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
Methoxychlor
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
Toxaphene
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
2,4-D
July 1, 1988 – June 30, 1991
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2007 – March 31, 2007	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2006 – December 31, 2006	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2006 – September 30, 2006	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
June 1, 2005 – June 30, 2005	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
May 1, 2005 – May 31, 2005	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
June 1, 2001 – June 30, 2001	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
May 1, 2001 – May 31, 2001	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
April 1, 2001 – April 30, 2001	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
June 1, 1999 – June 30, 1999	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
July 1, 1994 – June 30, 1998	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
April 1, 1991 – June 30, 1991	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Endrin	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	BHC-GAMMA	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Methoxychlor	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Toxaphene	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	2,4-D	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

December 3, 2018State Compliance achieved2 linked violations
October 26, 2018State Public Notification received1 linked violation
October 17, 2018State Formal Notice of Violation issued1 linked violation
June 25, 2007State Compliance achieved1 linked violation
June 11, 2007State Public Notification received1 linked violation
May 16, 2007State Public Notification requested1 linked violation
April 25, 2007State Public Notification received1 linked violation
March 27, 2007State Formal Notice of Violation issued2 linked violations
March 27, 2007State Public Notification requested1 linked violation
February 1, 2007State Public Notification received2 linked violations
January 9, 2007State Public Notification requested6 linked violations
June 8, 2005State Public Notification received2 linked violations
June 8, 2005State Public Notification requested3 linked violations
May 31, 2005State Public Notification received2 linked violations
May 24, 2005State Formal Notice of Violation issued3 linked violations
February 25, 2005State Public Notification received1 linked violation
February 14, 2005State Formal Notice of Violation issued1 linked violation
February 14, 2005State Public Notification requested1 linked violation
January 3, 2005State Compliance achieved2 linked violations
July 12, 2004State Public Notification requested7 linked violations
June 30, 2004State Formal Notice of Violation issued2 linked violations
June 17, 2004State Formal Notice of Violation issued2 linked violations
June 17, 2004State Public Notification requested1 linked violation
May 25, 2004State Formal Notice of Violation issued1 linked violation
May 25, 2004State Public Notification requested1 linked violation
April 2, 2004State Formal Notice of Violation issued1 linked violation
April 2, 2004State Public Notification received1 linked violation
April 2, 2004State Public Notification requested1 linked violation
December 17, 2003State Formal Notice of Violation issued1 linked violation
December 17, 2003State Public Notification requested1 linked violation
December 15, 2003State Compliance achieved1 linked violation
June 19, 2001State Formal Notice of Violation issued3 linked violations
June 19, 2001State Public Notification requested4 linked violations
June 19, 2001State Formal Notice of Violation issued2 linked violations
May 15, 2001State Formal Notice of Violation issued4 linked violations
March 1, 2000State Violation/Reminder Notice7 linked violations
March 1, 2000State Violation/Reminder Notice4 linked violations
December 2, 1999State Compliance achieved2 linked violations
June 4, 1999State Bilateral Compliance Agreement signed4 linked violations
June 4, 1999State Bilateral Compliance Agreement signed3 linked violations
June 4, 1999State Bilateral Compliance Agreement signed7 linked violations
June 4, 1999State Formal Notice of Violation issued3 linked violations
May 28, 1999State Public Notification requested2 linked violations
May 28, 1999State Formal Notice of Violation issued2 linked violations
May 4, 1999State Public Notification received2 linked violations
April 23, 1999State Public Notification requested2 linked violations
September 23, 1998State Public Notification received3 linked violations
July 14, 1992State Public Notification received1 linked violation
July 14, 1992State Public Notification received3 linked violations
June 25, 1992State Public Notification requested1 linked violation
June 25, 1992State Formal Notice of Violation issued5 linked violations
May 12, 1992State Compliance achieved3 linked violations
December 19, 1991State Compliance achieved3 linked violations
December 19, 1991State Compliance achieved3 linked violations
December 19, 1991State Compliance achieved1 linked violation
December 19, 1991State Compliance achieved2 linked violations
September 10, 1991State Compliance achieved1 linked violation
September 10, 1991State Intentional no-action1 linked violation
July 8, 1991State Public Notification received1 linked violation

Contact

WINTERSET MUNICIPAL WATERWORKS

515-462-3601

WINTERSET, IA 50273