IRWIN, IA · Shelby County
IRWIN MUNICIPAL SUPPLY Water System
Consumer Confidence Report status
IRWIN MUNICIPAL 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 IRWIN MUNICIPAL 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)
- IA8340099
- System type
- Community Water System
- Population served
- 313
- Service connections
- 177
- Ownership
- local government
- Water source
- groundwater (wells)
IRWIN MUNICIPAL SUPPLY is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 313 people from groundwater.
As of August 1, 2026, its federal record holds 5 entries between 1992 and 2025, all of which EPA lists as closed.
All 5 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.
Violation history
Monitoring, Routine (RTCR)
—Revised Total Coliform Rule
May 1, 2025 – May 31, 2025
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
December 1, 2023 – December 31, 2023
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
July 1, 2022 – July 31, 2022
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
January 1, 2000 – January 31, 2000
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
June 1, 1992 – June 30, 1992
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| May 1, 2025 – May 31, 2025 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| December 1, 2023 – December 31, 2023 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| July 1, 2022 – July 31, 2022 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| January 1, 2000 – January 31, 2000 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| June 1, 1992 – June 30, 1992 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- December 18, 2025State Formal Notice of Violation issued6 linked violations
- December 18, 2025State Public Notification requested1 linked violation
- December 8, 2025State Compliance achieved2 linked violations
- July 10, 2025State Public Notification received1 linked violation
- June 18, 2025State Public Notification requested2 linked violations
- February 24, 2025State Public Notification received1 linked violation
- January 17, 2025State Public Notification requested6 linked violations
- January 17, 2025State Public Notification requested2 linked violations
- November 12, 2024State Compliance achieved25 linked violations
- February 28, 2024State Public Notification received1 linked violation
- January 17, 2024State Public Notification requested3 linked violations
- September 1, 2022State Public Notification received6 linked violations
- August 17, 2022State Public Notification requested1 linked violation
- August 16, 2022State Formal Notice of Violation issued1 linked violation
- February 17, 2000State Public Notification requested3 linked violations
- February 7, 2000State Compliance achieved2 linked violations
- May 4, 1994State Public Notification received3 linked violations
- April 22, 1994State Formal Notice of Violation issued5 linked violations
- April 22, 1994State Public Notification requested2 linked violations
- September 18, 1992State Public Notification received1 linked violation
- September 11, 1992State Public Notification requested2 linked violations
- September 11, 1992State Public Notification requested2 linked violations
- July 7, 1992State Compliance achieved1 linked violation
- September 30, 1984Federal issued Formal Notice of Violation1 linked violation
Common questions
Is IRWIN MUNICIPAL SUPPLY required to publish a Consumer Confidence Report?
- Yes. IRWIN MUNICIPAL 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 IRWIN MUNICIPAL SUPPLY’s next Consumer Confidence Report due?
- IRWIN MUNICIPAL SUPPLY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does IRWIN MUNICIPAL SUPPLY have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for IRWIN MUNICIPAL 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
IRWIN MUNICIPAL SUPPLY
712-782-3332
IRWIN, IA 51446