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HIDDEN LAKE COLONY

Montana — Community Water System — PWSID: MT0003932

System Information

PWSIDMT0003932
System NameHIDDEN LAKE COLONY
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMay 29, 1997
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityCUT BANK
ZIP Code59427
Address100 WELSH ROAD
OrganizationHIDDEN LAKE COLONY INC
Phone406-336-3695

Population & Service

Population Served80
Service Connections7

Drinking Water Violations (236)

This water system has 236 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
Oct 1, 2025 — Consumer Confidence Rule Other No No — — — Unaddressed — Consumer Confidence Rule
Oct 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Oct 1, 2024 Consumer Confidence Rule
Oct 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Oct 1, 2024 Consumer Confidence Rule
Jul 1, 2024 Jul 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2024 Revised Total Coliform Rule
Jul 1, 2024 Jul 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2024 Revised Total Coliform Rule
Jul 1, 2024 Jul 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2024 Revised Total Coliform Rule
Apr 1, 2024 Apr 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2024 Revised Total Coliform Rule
Apr 1, 2024 Apr 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2024 Revised Total Coliform Rule
Apr 1, 2024 Apr 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2024 Revised Total Coliform Rule
Jun 1, 2023 Jun 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2023 Revised Total Coliform Rule
Jun 1, 2023 Jun 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2023 Revised Total Coliform Rule
Jun 1, 2023 Jun 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2023 Revised Total Coliform Rule
Apr 1, 2023 Jun 30, 2023 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Jun 27, 2023 Inorganic Chemicals
Apr 1, 2023 Jun 30, 2023 Arsenic MR No Yes — 0.010 mg/L — Resolved Jun 27, 2023 Arsenic Rule
Apr 1, 2023 Jun 30, 2023 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Jun 27, 2023 Inorganic Chemicals
Apr 1, 2023 Jun 30, 2023 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Jun 27, 2023 Inorganic Chemicals
Apr 1, 2023 Jun 30, 2023 Arsenic MR No Yes — 0.010 mg/L — Resolved Jun 27, 2023 Arsenic Rule
Apr 1, 2023 Jun 30, 2023 Arsenic MR No Yes — 0.010 mg/L — Resolved Jun 27, 2023 Arsenic Rule
Mar 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Mar 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Mar 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Oct 1, 2022 Dec 31, 2022 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2022 Inorganic Chemicals
Oct 1, 2022 Dec 31, 2022 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2022 Inorganic Chemicals
Oct 1, 2022 Dec 31, 2022 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2022 Inorganic Chemicals
Sep 22, 2022 — E. COLI MR No Yes — — — Resolved Sep 27, 2022 Ground Water Rule
Sep 22, 2022 — E. COLI MR No Yes — — — Resolved Sep 27, 2022 Ground Water Rule
Sep 22, 2022 — E. COLI MR No Yes — — — Resolved Sep 27, 2022 Ground Water 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
Dec 1, 2021 Dec 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2021 Revised Total Coliform Rule
Dec 1, 2021 Dec 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2021 Revised Total Coliform Rule
Dec 1, 2021 Dec 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2021 Revised Total Coliform Rule
Jul 1, 2020 Sep 30, 2020 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Sep 30, 2020 Inorganic Chemicals
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Jul 20, 2020 Consumer Confidence Rule
Jul 1, 2020 Sep 30, 2020 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Sep 30, 2020 Inorganic Chemicals
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Jul 20, 2020 Consumer Confidence Rule
Jul 1, 2020 Sep 30, 2020 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2020 Arsenic Rule
Jul 1, 2020 Sep 30, 2020 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2020 Arsenic Rule
Jul 1, 2020 Sep 30, 2020 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2020 Arsenic Rule
Jul 1, 2020 Sep 30, 2020 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Sep 30, 2020 Inorganic Chemicals
Apr 1, 2020 Jun 30, 2020 Nitrate-Nitrite MR No Yes — — — Resolved Jun 30, 2020 Nitrate Rule
Apr 1, 2020 Jun 30, 2020 Nitrate-Nitrite MR No Yes — — — Resolved Jun 30, 2020 Nitrate Rule
Apr 1, 2020 Jun 30, 2020 Nitrate-Nitrite MR No Yes — — — Resolved Jun 30, 2020 Nitrate Rule
Apr 1, 2020 Jun 30, 2020 Nitrate-Nitrite MR No Yes — — — Resolved Jun 30, 2020 Nitrate Rule
Apr 1, 2019 Jun 30, 2019 Dalapon MR No Yes — 0.2 mg/L — Resolved Jun 30, 2019 Synthetic Organic Chemicals
Apr 1, 2019 Jun 30, 2019 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jun 30, 2019 Synthetic Organic Chemicals
Apr 1, 2019 Jun 30, 2019 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jun 30, 2019 Synthetic Organic Chemicals
Apr 1, 2019 Jun 30, 2019 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 27, 2019 Radionuclides and Revised Rad Rule
Apr 1, 2019 Jun 30, 2019 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Jun 30, 2019 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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