Is WINTERSET MUNICIPAL WATERWORKS required to publish a Consumer Confidence Report?

Yes. WINTERSET MUNICIPAL WATERWORKS is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is WINTERSET MUNICIPAL WATERWORKS’s next Consumer Confidence Report due?

WINTERSET MUNICIPAL WATERWORKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

WINTERSET, IA · Madison County

WINTERSET MUNICIPAL WATERWORKS Water System

Consumer Confidence Report status

WINTERSET MUNICIPAL WATERWORKS must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for WINTERSET MUNICIPAL WATERWORKS.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)

WINTERSET MUNICIPAL WATERWORKS is one of 91 community water systems in Iowa in the 3,301 to 10,000 people size category, serving 5,428 people from surface water.

As of August 1, 2026, its federal record holds 15 entries between 1988 and 2007, all of which EPA lists as closed. Nothing has been added since 2007.

Of the 15, 6 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves inorganic chemicals, synthetic organic chemicals, and the Stage 1 Disinfectants and Disinfection Byproducts Rule.

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, 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, Average
Health-based
TTHM
January 1, 2004 – March 31, 2004
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
June 1, 1999 – June 30, 1999
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
Monitoring, Regular
—
2,4,5-TP
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
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
January 1, 2004 – March 31, 2004	Maximum Contaminant Level Violation, Average	TTHM	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
June 1, 1999 – June 30, 1999	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	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
July 1, 1988 – June 30, 1991	Monitoring, Regular	2,4,5-TP	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

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 Public Notification requested1 linked violation
January 9, 2007State Formal Notice of Violation issued2 linked violations
November 15, 2005State Bilateral Compliance Agreement signed3 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
May 24, 2005State Public Notification requested3 linked violations
February 25, 2005State Public Notification received1 linked violation
February 14, 2005State Public Notification requested1 linked violation
February 14, 2005State Formal Notice of Violation issued1 linked violation
January 3, 2005State Compliance achieved2 linked violations
July 12, 2004State Public Notification requested7 linked violations
July 12, 2004State Formal Notice of Violation issued4 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 Public Notification requested1 linked violation
December 17, 2003State Formal Notice of Violation issued1 linked violation
December 15, 2003State Compliance achieved1 linked violation
December 20, 2001State Compliance achieved3 linked violations
June 19, 2001State Formal Notice of Violation issued2 linked violations
June 19, 2001State Formal Notice of Violation issued3 linked violations
May 15, 2001State Public Notification requested5 linked violations
May 15, 2001State Formal Notice of Violation issued4 linked violations
April 9, 2001State Public Notification received2 linked violations
April 6, 2001State Formal Notice of Violation issued4 linked violations
June 4, 1999State Bilateral Compliance Agreement signed4 linked violations
June 4, 1999State Bilateral Compliance Agreement signed4 linked violations
June 4, 1999State Formal Notice of Violation issued3 linked violations
June 4, 1999State Public Notification requested2 linked violations
June 4, 1999State Bilateral Compliance Agreement signed3 linked violations
May 28, 1999State Public Notification requested2 linked violations
May 28, 1999State Formal Notice of Violation issued2 linked violations
April 23, 1999State Public Notification requested2 linked violations
July 20, 1998State Formal Notice of Violation issued3 linked violations
July 14, 1992State Public Notification received3 linked violations
July 14, 1992State Public Notification received1 linked violation
June 25, 1992State Formal Notice of Violation issued2 linked violations
June 25, 1992State Public Notification requested1 linked violation
May 12, 1992State Compliance achieved3 linked violations
December 19, 1991State Compliance achieved1 linked violation
December 19, 1991State Compliance achieved3 linked violations
December 19, 1991State Compliance achieved2 linked violations
September 10, 1991State Intentional no-action1 linked violation
September 10, 1991State Compliance achieved1 linked violation
September 10, 1991State Intentional no-action2 linked violations
July 8, 1991State Public Notification received1 linked violation
June 18, 1991State Public Notification requested2 linked violations

Common questions

Is WINTERSET MUNICIPAL WATERWORKS required to publish a Consumer Confidence Report?: Yes. WINTERSET MUNICIPAL WATERWORKS is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is WINTERSET MUNICIPAL WATERWORKS’s next Consumer Confidence Report due?: WINTERSET MUNICIPAL WATERWORKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does WINTERSET MUNICIPAL WATERWORKS have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for WINTERSET MUNICIPAL WATERWORKS.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

WINTERSET MUNICIPAL WATERWORKS

515-462-3601

WINTERSET, IA 50273