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SHAMROCK COLONY

South Dakota — Community Water System — PWSID: SD4602267

System Information

PWSIDSD4602267
System NameSHAMROCK COLONY
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedDec 31, 2008
Last ReportedDec 9, 2025

Location & Contact

StateSouth Dakota
CityCARPENTER
ZIP Code57322
Address19087 413TH AVENUE
OrganizationSHAMROCK COLONY
Phone6053521452

Population & Service

Population Served75
Service Connections17

Drinking Water Violations (217)

This water system has 217 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
Aug 1, 2025 Aug 31, 2025 Revised Total Coliform Rule MON No Yes — — — Archived Aug 31, 2025 Revised Total Coliform Rule
Jul 1, 2025 — Consumer Confidence Rule Other No No — — — Unaddressed — Consumer Confidence Rule
Jun 1, 2025 Jun 30, 2025 Revised Total Coliform Rule MON No Yes — — — Archived Jun 30, 2025 Revised Total Coliform Rule
Mar 1, 2025 Mar 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2025 Revised Total Coliform Rule
Mar 1, 2025 Mar 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2025 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
Jan 1, 2024 Jan 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2024 Revised Total Coliform Rule
Jan 1, 2024 Jan 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 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
Oct 1, 2021 Oct 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2021 Revised Total Coliform Rule
Oct 1, 2021 Oct 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2021 Revised Total Coliform Rule
Oct 1, 2021 Oct 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2021 Revised Total Coliform Rule
Sep 1, 2021 Sep 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2021 Revised Total Coliform Rule
Sep 1, 2021 Sep 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2021 Revised Total Coliform Rule
Sep 1, 2021 Sep 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2021 Revised Total Coliform Rule
Jan 1, 2021 Jan 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2021 Revised Total Coliform Rule
Jan 1, 2021 Jan 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2021 Revised Total Coliform Rule
Jan 1, 2021 Jan 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2021 Revised Total Coliform Rule
Dec 1, 2019 Dec 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2019 Revised Total Coliform Rule
Dec 1, 2019 Dec 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2019 Revised Total Coliform Rule
Dec 1, 2019 Dec 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2019 Revised Total Coliform Rule
Nov 22, 2017 — Groundwater Rule TT Yes No — — — Resolved Jun 4, 2018 Ground Water Rule
Nov 22, 2017 — Groundwater Rule TT Yes No — — — Resolved Jun 4, 2018 Ground Water Rule
Jul 1, 2017 Jul 31, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2017 Revised Total Coliform Rule
Jul 1, 2017 Jul 31, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2017 Revised Total Coliform Rule
Jul 1, 2017 Jul 31, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2017 Revised Total Coliform Rule
Jan 1, 2014 Mar 31, 2014 Dinoseb MR No Yes — 0.007 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Diquat MR No Yes — 0.02 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 LASSO MR No Yes — — — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Glyphosate MR No Yes — 0.7 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Endothall MR No Yes — 0.1 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Endothall MR No Yes — 0.1 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Dinoseb MR No Yes — 0.007 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 OXAMYL MR No Yes — 0.2 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Atrazine MR No Yes — 0.003 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Endrin MR No Yes — 0.002 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 LASSO MR No Yes — — — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Atrazine MR No Yes — 0.003 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals
Jan 1, 2014 Mar 31, 2014 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Mar 31, 2014 Synthetic Organic Chemicals

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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