MARENGO, IA · Iowa County

MARENGO WATER SUPPLY 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): IA4843033
System type: Community Water System
Population served: 2,435
Service connections: 1,020
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring and Reporting (DBP)
—
TTHM
August 1, 2019 – August 31, 2019
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – June 23, 2017
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 2001 – May 31, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1997 – July 31, 1997
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
April 1, 1991 – September 5, 1991
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1991 – March 31, 1991
Resolved
Monitoring, Regular
—
Selenium
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
Arsenic
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
Barium
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
Cadmium
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
Chromium
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
Fluoride
July 1, 1988 – June 30, 1991
Resolved
Monitoring, Regular
—
Nitrate
April 1, 1988 – June 30, 1988
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
August 1, 2019 – August 31, 2019	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2016 – June 23, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
May 1, 2001 – May 31, 2001	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 1997 – July 31, 1997	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 1991 – September 5, 1991	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 1991 – March 31, 1991	Monitoring, Regular	Nitrate	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Selenium	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Arsenic	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Barium	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Cadmium	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Chromium	—	Resolved
July 1, 1988 – June 30, 1991	Monitoring, Regular	Fluoride	—	Resolved
April 1, 1988 – June 30, 1988	Monitoring, Regular	Nitrate	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

August 27, 2020State Compliance achieved1 linked violation
August 27, 2020State Compliance achieved1 linked violation
April 28, 2020State Public Notification received1 linked violation
April 28, 2020State Public Notification received1 linked violation
October 16, 2019State Public Notification requested1 linked violation
October 16, 2019State Public Notification requested1 linked violation
October 16, 2019State Formal Notice of Violation issued1 linked violation
October 16, 2019State Formal Notice of Violation issued1 linked violation
June 23, 2017State Compliance achieved1 linked violation
June 23, 2017State Public Notification received1 linked violation
September 19, 2016State Public Notification requested1 linked violation
September 19, 2016State Formal Notice of Violation issued1 linked violation
July 2, 2014State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
November 20, 2013State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
November 20, 2013State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 3, 2013State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 24, 2006State Public Notification received1 linked violation
September 5, 2001State Public Notification received3 linked violations
August 9, 2001State Public Notification received3 linked violations
August 9, 2001State Public Notification received3 linked violations
August 2, 2001State Compliance achieved3 linked violations
July 27, 2001State Formal Notice of Violation issued3 linked violations
July 27, 2001State Formal Notice of Violation issued1 linked violation
June 28, 2001State Compliance achieved3 linked violations
May 19, 1992State Formal Notice of Violation issued1 linked violation
September 5, 1991State Compliance achieved1 linked violation
September 5, 1991State Compliance achieved1 linked violation
September 5, 1991State Compliance achieved1 linked violation
September 5, 1991State Compliance achieved2 linked violations
September 5, 1991State Compliance achieved3 linked violations
September 5, 1991State Compliance achieved1 linked violation
August 26, 1991State Formal Notice of Violation issued1 linked violation
August 26, 1991State Formal Notice of Violation issued3 linked violations
August 26, 1991State Formal Notice of Violation issued1 linked violation
August 26, 1991State Formal Notice of Violation issued1 linked violation
August 26, 1991State Public Notification requested1 linked violation
August 26, 1991State Formal Notice of Violation issued1 linked violation
February 27, 1990State Compliance achieved1 linked violation
September 30, 1984Federal issued Formal Notice of Violationgeneral compliance action — not tied to a specific violation on record
February 16, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record

Contact

MARENGO WATER SUPPLY

319-521-7043

MARENGO, IA 52301