Public Water Partners

MARENGO, IA · Iowa County

MARENGO WATER SUPPLY Water System

Consumer Confidence Report status

MARENGO WATER SUPPLY 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 MARENGO WATER SUPPLY.

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

MARENGO WATER SUPPLY is one of 403 community water systems in Iowa in the 501 to 3,300 people size category, serving 2,435 people from groundwater.

As of August 1, 2026, its federal record holds 10 entries between 1988 and 2016, all of which EPA lists as closed. Nothing has been added since 2016.

Of the 10, 9 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, the Consumer Confidence Rule, and the Total Coliform Rules.

Violation history

  • 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

  • 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

    —

    Nitrate

    April 1, 1990 – June 30, 1990

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    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

Enforcement actions

Common questions

Is MARENGO WATER SUPPLY required to publish a Consumer Confidence Report?

Yes. MARENGO WATER SUPPLY 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 MARENGO WATER SUPPLY’s next Consumer Confidence Report due?

MARENGO WATER SUPPLY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does MARENGO WATER SUPPLY have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for MARENGO WATER SUPPLY.

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

MARENGO WATER SUPPLY

319-521-7043

MARENGO, IA 52301