ROCKWELL CITY, IA · Calhoun County

TWIN LAKES UTILITIES 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): IA1300101
System type: Community Water System
Population served: 300
Service connections: 400
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Lead Consumer Notice
—
Lead and Copper Rule
March 1, 2022 – April 29, 2022
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrite
December 1, 2012 – December 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2008 – November 30, 2008
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrite
July 1, 1994 – September 30, 1994
Resolved
Monitoring, Regular
—
Nitrate
October 1, 1984 – September 30, 1987
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
March 1, 2022 – April 29, 2022	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
December 1, 2012 – December 31, 2012	Maximum Contaminant Level Violation, Single Sample	Nitrite	Health-based	Resolved
November 1, 2008 – November 30, 2008	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1994 – September 30, 1994	Maximum Contaminant Level Violation, Single Sample	Nitrite	Health-based	Resolved
October 1, 1984 – September 30, 1987	Monitoring, Regular	Nitrate	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

February 1, 2024State Compliance achieved1 linked violation
January 18, 2024State Formal Notice of Violation issued1 linked violation
April 29, 2022State Compliance achieved1 linked violation
April 29, 2022State Compliance achieved1 linked violation
April 29, 2022State Public Notification received1 linked violation
April 29, 2022State Public Notification received1 linked violation
April 21, 2022State Formal Notice of Violation issued1 linked violation
April 21, 2022State Formal Notice of Violation issued1 linked violation
September 5, 2013State Public Notification received1 linked violation
August 20, 2013State Compliance achieved1 linked violation
August 20, 2013State Compliance achieved1 linked violation
March 7, 2013State Public Notification requested1 linked violation
December 12, 2012State Formal Notice of Violation issued2 linked violations
February 24, 1999State Compliance achieved2 linked violations
May 30, 1996State Compliance achieved4 linked violations
May 30, 1996State Compliance achieved3 linked violations
May 30, 1996State Compliance achieved7 linked violations
November 14, 1994State Public Notification received3 linked violations
October 14, 1994State Formal Notice of Violation issued4 linked violations
February 22, 1989State Formal Notice of Violation issued1 linked violation

Contact

TWIN LAKES UTILITIES

712-297-8616

ROCKWELL CITY, IA 50568