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ROCKPORT COLONY

Montana — Community Water System — PWSID: MT0001778

System Information

PWSIDMT0001778
System NameROCKPORT COLONY
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 5, 1980
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityPENDROY
ZIP Code59467
AddressBOX 100
OrganizationHOFER, JACOB J
Phone406-469-2247

Population & Service

Population Served92
Service Connections10

Drinking Water Violations (200)

This water system has 200 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
Dec 30, 2020 — Lead and Copper Rule MR No No — TT — Resolved Jan 15, 2021 Lead and Copper Rule
Dec 30, 2020 — Lead and Copper Rule MR No No — TT — Resolved Jan 15, 2021 Lead and Copper Rule
Jan 1, 2018 Mar 31, 2018 Nitrate-Nitrite MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 Nitrate Rule
Jan 1, 2018 Mar 31, 2018 Nitrate-Nitrite MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 Nitrate Rule
Jan 1, 2018 Mar 31, 2018 Nitrate-Nitrite MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 Nitrate Rule
Jan 1, 2018 Mar 31, 2018 Nitrate-Nitrite MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 Nitrate Rule
Jan 1, 2018 Mar 31, 2018 Nitrate-Nitrite MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 Nitrate Rule
Jan 1, 2018 Mar 31, 2018 Nitrate-Nitrite MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 Nitrate Rule
Dec 30, 2017 — Lead and Copper Rule MR No No — TT — Resolved Feb 5, 2018 Lead and Copper Rule
Dec 30, 2017 — Lead and Copper Rule MR No No — TT — Resolved Feb 5, 2018 Lead and Copper Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 Arsenic Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Jan 1, 2012 — Lead and Copper Rule MR No No — TT — Resolved Mar 30, 2012 Lead and Copper Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Jan 1, 2012 — Lead and Copper Rule MR No No — TT — Resolved Mar 30, 2012 Lead and Copper Rule
Jan 1, 2012 — Lead and Copper Rule MR No No — TT — Resolved Mar 30, 2012 Lead and Copper Rule
Jan 1, 2012 — Lead and Copper Rule MR No No — TT — Resolved Mar 30, 2012 Lead and Copper Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Jan 1, 2012 Dec 31, 2012 Nitrate-Nitrite MCL Yes No 11.5 MG/L — 10 Resolved Aug 20, 2012 Nitrate Rule
Jan 1, 2012 Dec 31, 2012 Nitrate-Nitrite MCL Yes No 11.5 MG/L — 10 Resolved Aug 20, 2012 Nitrate Rule
Jan 1, 2012 Dec 31, 2012 Nitrate-Nitrite MCL Yes No 11.5 MG/L — 10 Resolved Aug 20, 2012 Nitrate Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jan 1, 2011 Dec 31, 2013 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Jan 24, 2011 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Jan 24, 2011 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Jan 24, 2011 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Jan 24, 2011 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jan 24, 2011 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Jan 24, 2011 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Jan 24, 2011 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jan 24, 2011 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jan 24, 2011 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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