MARSHALLTOWN, IA · Marshall County
MARSHALLTOWN WATER WORKS Water System
Consumer Confidence Report status
MARSHALLTOWN WATER WORKS 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 MARSHALLTOWN WATER WORKS.
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)
- IA6469042
- System type
- Community Water System
- Population served
- 27,680
- Service connections
- 9,812
- Ownership
- local government
- Water source
- groundwater (wells)
MARSHALLTOWN WATER WORKS is among the 21 largest community water systems in Iowa, serving 27,680 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 1986 and 1992, all of which EPA lists as closed. Nothing has been added since 1992.
All 2 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 the Total Coliform Rules and inorganic chemicals.
Violation history
Monitoring, Routine Minor (TCR)
—Coliform (TCR)
June 1, 1992 – June 30, 1992
ResolvedMonitoring, Regular
—Nitrate
October 1, 1986 – September 30, 1989
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| June 1, 1992 – June 30, 1992 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| October 1, 1986 – September 30, 1989 | Monitoring, Regular | Nitrate | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- June 24, 1994State Formal Notice of Violation issued5 linked violations
- August 12, 1992State Public Notification requested3 linked violations
- August 12, 1992State Formal Notice of Violation issued3 linked violations
- August 12, 1992State Formal Notice of Violation issued1 linked violation
- November 22, 1988State Compliance achieved1 linked violation
- November 17, 1988State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- February 19, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
Common questions
Is MARSHALLTOWN WATER WORKS required to publish a Consumer Confidence Report?
- Yes. MARSHALLTOWN WATER WORKS 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 MARSHALLTOWN WATER WORKS’s next Consumer Confidence Report due?
- MARSHALLTOWN WATER WORKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MARSHALLTOWN WATER WORKS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MARSHALLTOWN WATER WORKS.
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
MARSHALLTOWN WATERWORKS BOARD OF TRUSTEE
641-753-7913
MARSHALLTOWN, IA 50158