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CLARKS LOOKOUT

Montana — Community Water System — PWSID: MT0004249

System Information

PWSIDMT0004249
System NameCLARKS LOOKOUT
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 29, 2012
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityDILLON
ZIP Code59725
Address335 WILLIAMS DR
OrganizationREYES, JOSEPH
Phone480-241-9541

Population & Service

Population Served62
Service Connections43

Drinking Water Violations (35)

This water system has 35 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 — — — Resolved Oct 6, 2025 Consumer Confidence Rule
Oct 1, 2025 — Consumer Confidence Rule Other No No — — — Resolved Oct 6, 2025 Consumer Confidence Rule
Oct 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Oct 10, 2024 Consumer Confidence Rule
Jul 1, 2021 — Consumer Confidence Rule Other No No — — — Resolved Sep 8, 2021 Consumer Confidence Rule
Jul 1, 2021 — Consumer Confidence Rule Other No No — — — Resolved Sep 8, 2021 Consumer Confidence Rule
Oct 1, 2019 Dec 31, 2019 Arsenic MCL Yes No .024 MG/L 0.010 mg/L .01 Resolved Dec 31, 2019 Arsenic Rule
Oct 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Sep 10, 2021 Consumer Confidence Rule
Jul 1, 2019 Sep 30, 2019 Arsenic MCL Yes No .023 MG/L 0.010 mg/L .01 Resolved Sep 30, 2019 Arsenic Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Sep 10, 2021 Consumer Confidence Rule
Apr 1, 2019 Jun 30, 2019 Arsenic MCL Yes No .022 MG/L 0.010 mg/L .01 Resolved Jun 30, 2019 Arsenic Rule
Apr 1, 2019 Jun 30, 2019 Arsenic MCL Yes No .022 MG/L 0.010 mg/L .01 Resolved Jun 30, 2019 Arsenic Rule
Apr 1, 2019 Jun 30, 2019 Arsenic MCL Yes No .022 MG/L 0.010 mg/L .01 Resolved Jun 30, 2019 Arsenic Rule
Jan 1, 2019 Mar 31, 2019 Arsenic MCL Yes No .023 MG/L 0.010 mg/L .01 Resolved Mar 31, 2019 Arsenic Rule
Jan 1, 2019 Mar 31, 2019 Arsenic MCL Yes No .023 MG/L 0.010 mg/L .01 Resolved Mar 31, 2019 Arsenic Rule
Jan 1, 2019 Mar 31, 2019 Arsenic MCL Yes No .023 MG/L 0.010 mg/L .01 Resolved Mar 31, 2019 Arsenic Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MCL Yes No .024 MG/L 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MCL Yes No .024 MG/L 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MCL Yes No .024 MG/L 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Jul 1, 2018 — Consumer Confidence Rule Other No No — — — Resolved Sep 10, 2021 Consumer Confidence Rule
Jul 1, 2018 Sep 30, 2018 Arsenic MCL Yes No .024 MG/L 0.010 mg/L .01 Resolved Sep 30, 2018 Arsenic Rule
Jul 1, 2018 Sep 30, 2018 Arsenic MCL Yes No .024 MG/L 0.010 mg/L .01 Resolved Sep 30, 2018 Arsenic Rule
Apr 1, 2018 Jun 30, 2018 Arsenic MCL Yes No .024 MG/L 0.010 mg/L .01 Resolved Jun 30, 2018 Arsenic Rule
Oct 1, 2017 Dec 31, 2017 Arsenic MCL Yes No .025 MG/L 0.010 mg/L .01 Resolved Dec 31, 2017 Arsenic Rule
Oct 1, 2017 Dec 31, 2017 Arsenic MCL Yes No .025 MG/L 0.010 mg/L .01 Resolved Dec 31, 2017 Arsenic Rule
Jul 1, 2017 Sep 30, 2017 Arsenic MCL Yes No .024 MG/L 0.010 mg/L .01 Resolved Sep 30, 2017 Arsenic Rule
Jan 1, 2017 Mar 31, 2017 Arsenic MCL Yes No .022 MG/L 0.010 mg/L .01 Resolved Mar 31, 2017 Arsenic Rule
Jan 1, 2017 Mar 31, 2017 Arsenic MCL Yes No .022 MG/L 0.010 mg/L .01 Resolved Mar 31, 2017 Arsenic Rule
Oct 1, 2016 Dec 31, 2016 Arsenic MCL Yes No .024 MG/L 0.010 mg/L .01 Resolved Dec 31, 2016 Arsenic Rule
Apr 1, 2016 Jun 30, 2016 Arsenic MCL Yes No .23 MG/L 0.010 mg/L .1 Resolved Jun 30, 2016 Arsenic Rule
Oct 1, 2013 Dec 31, 2013 Arsenic MCL Yes No .023 MG/L 0.010 mg/L — Resolved Dec 31, 2013 Arsenic Rule
Oct 1, 2013 Dec 31, 2013 Arsenic MCL Yes No .023 MG/L 0.010 mg/L — Resolved Dec 31, 2013 Arsenic Rule
Jul 1, 2013 Sep 30, 2013 Arsenic MCL Yes No .025 MG/L 0.010 mg/L .01 Resolved Sep 30, 2013 Arsenic Rule
Oct 1, 2012 Dec 31, 2012 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 2012 Synthetic Organic Chemicals
Oct 1, 2012 Dec 31, 2012 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 2012 Synthetic Organic Chemicals
Oct 1, 2012 Dec 31, 2012 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 2012 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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