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IRWIN MUNICIPAL SUPPLY

Iowa — Community Water System — PWSID: IA8340099

System Information

PWSIDIA8340099
System NameIRWIN MUNICIPAL SUPPLY
System TypeCommunity Water System
Water SourceGround Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region07
Serves SchoolNo
WholesalerNo
First ReportedFeb 27, 1979
Last ReportedDec 19, 2025

Location & Contact

StateIowa
CityIRWIN
ZIP Code51446
AddressATTN MICHAEL BUTLER WATER SUPT
OrganizationIRWIN MUNICIPAL SUPPLY
Phone712-782-3332

Population & Service

Population Served313
Service Connections177

Drinking Water Violations (52)

This water system has 52 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
May 1, 2025 May 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2025 Revised Total Coliform Rule
May 1, 2025 May 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2025 Revised Total Coliform Rule
May 1, 2025 May 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2025 Revised Total Coliform Rule
May 1, 2025 May 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2025 Revised Total Coliform Rule
Dec 1, 2024 Dec 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2024 Revised Total Coliform Rule
Dec 1, 2024 Dec 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2024 Revised Total Coliform Rule
Dec 1, 2024 Dec 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2024 Revised Total Coliform Rule
Dec 1, 2024 Dec 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2024 Revised Total Coliform Rule
Dec 1, 2024 Dec 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2024 Revised Total Coliform Rule
Dec 1, 2024 Dec 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2024 Revised Total Coliform Rule
Oct 1, 2024 Oct 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2024 Revised Total Coliform Rule
Oct 1, 2024 Oct 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2024 Revised Total Coliform Rule
Oct 1, 2024 Oct 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2024 Revised Total Coliform Rule
Oct 1, 2024 Oct 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2024 Revised Total Coliform Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Jul 1, 2022 Jul 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2022 Revised Total Coliform Rule
Jul 1, 2022 Jul 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2022 Revised Total Coliform Rule
Jul 1, 2022 Jul 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2022 Revised Total Coliform Rule
Jul 1, 2022 Jul 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2022 Revised Total Coliform Rule
Jul 1, 2022 Jul 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2022 Revised Total Coliform Rule
Jul 1, 2022 Jul 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2022 Revised Total Coliform Rule
Jan 1, 2000 Jan 31, 2000 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2000 Total Coliform Rule
Jan 1, 2000 Jan 31, 2000 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2000 Total Coliform Rule
Jan 1, 2000 Jan 31, 2000 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2000 Total Coliform Rule
Feb 1, 1994 Feb 28, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1994 Total Coliform Rule
Feb 1, 1994 Feb 28, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1994 Total Coliform Rule
Feb 1, 1994 Feb 28, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1994 Total Coliform Rule
Feb 1, 1994 Feb 28, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1994 Total Coliform Rule
Feb 1, 1994 Feb 28, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1994 Total Coliform Rule
Feb 1, 1994 Feb 28, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1994 Total Coliform Rule
Feb 1, 1994 Feb 28, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1994 Total Coliform Rule
Feb 1, 1994 Feb 28, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1994 Total Coliform Rule
Jan 1, 1993 Mar 31, 1993 Nitrate MR No Yes — 10 mg/L — Resolved Mar 31, 1993 Nitrate Rule
Jan 1, 1993 Mar 31, 1993 Nitrate MR No Yes — 10 mg/L — Resolved Mar 31, 1993 Nitrate Rule
Jan 1, 1993 Mar 31, 1993 Nitrate MR No Yes — 10 mg/L — Resolved Mar 31, 1993 Nitrate Rule
Jan 1, 1993 Mar 31, 1993 Nitrate MR No Yes — 10 mg/L — Resolved Mar 31, 1993 Nitrate Rule
Jan 1, 1993 Mar 31, 1993 Nitrate MR No Yes — 10 mg/L — Resolved Mar 31, 1993 Nitrate Rule
Jan 1, 1993 Mar 31, 1993 Nitrate MR No Yes — 10 mg/L — Resolved Mar 31, 1993 Nitrate Rule
Jan 1, 1993 Mar 31, 1993 Nitrate MR No Yes — 10 mg/L — Resolved Mar 31, 1993 Nitrate Rule
Jan 1, 1993 Mar 31, 1993 Nitrate MR No Yes — 10 mg/L — Resolved Mar 31, 1993 Nitrate Rule
Jun 1, 1992 Jun 30, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 1992 Total Coliform Rule
Jun 1, 1992 Jun 30, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 1992 Total Coliform Rule
Jun 1, 1992 Jun 30, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 1992 Total Coliform Rule
Jun 1, 1992 Jun 30, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 1992 Total Coliform Rule
— — — No No — — — — — —
— — — No No — — — — — —
— — — No No — — — — — —

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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