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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 ReportedMar 26, 2026

Location & Contact

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

Population & Service

Population Served92
Service Connections10

Drinking Water Violations (203)

This water system has 203 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 — MR No No — TT — Resolved Jan 15, 2021 —
Dec 30, 2020 — MR No No — TT — Resolved Jan 15, 2021 —
Jan 1, 2018 Mar 31, 2018 MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 —
Jan 1, 2018 Mar 31, 2018 MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 —
Jan 1, 2018 Mar 31, 2018 MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 —
Jan 1, 2018 Mar 31, 2018 MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 —
Jan 1, 2018 Mar 31, 2018 MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 —
Jan 1, 2018 Mar 31, 2018 MCL Yes No 14.6 MG/L — 10 Resolved Mar 31, 2018 —
Dec 30, 2017 — MR No No — TT — Resolved Feb 5, 2018 —
Dec 30, 2017 — MR No No — TT — Resolved Feb 5, 2018 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .018 MG/L 0.010 mg/L — Resolved Jun 30, 2012 —
Jan 1, 2012 Dec 31, 2012 MCL Yes No 11.5 MG/L — 10 Resolved Aug 20, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 —
Jan 1, 2012 — MR No No — TT — Resolved Mar 30, 2012 —
Jan 1, 2012 — MR No No — TT — Resolved Mar 30, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 —
Jan 1, 2012 — MR No No — TT — Resolved Mar 30, 2012 —
Jan 1, 2012 Dec 31, 2012 MCL Yes No 11.5 MG/L — 10 Resolved Aug 20, 2012 —
Jan 1, 2012 — MR No No — TT — Resolved Mar 30, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 —
Jan 1, 2012 Dec 31, 2012 MCL Yes No 11.5 MG/L — 10 Resolved Aug 20, 2012 —
Oct 1, 2011 Dec 31, 2011 MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 —
Oct 1, 2011 Dec 31, 2011 MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 —
Oct 1, 2011 Dec 31, 2011 MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 —
Oct 1, 2011 Dec 31, 2011 MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 —
Oct 1, 2011 Dec 31, 2011 MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 —
Oct 1, 2011 Dec 31, 2011 MCL Yes No .017 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 —
Jul 1, 2011 Sep 30, 2011 MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 —
Jul 1, 2011 Sep 30, 2011 MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 —
Jul 1, 2011 Sep 30, 2011 MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 —
Jul 1, 2011 Sep 30, 2011 MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 —
Jul 1, 2011 Sep 30, 2011 MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 —
Jul 1, 2011 Sep 30, 2011 MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.004 mg/L — Resolved Jan 24, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.0002 mg/L — Resolved Jan 24, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.005 mg/L — Resolved Jan 24, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.5 mg/L — Resolved Jan 24, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.05 mg/L — Resolved Jan 24, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.005 mg/L — Resolved Jan 24, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.05 mg/L — Resolved Jan 24, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.001 mg/L — Resolved Jan 24, 2011 —
Jan 1, 2011 Dec 31, 2013 MR No Yes — 0.0002 mg/L — Resolved Jan 24, 2011 —

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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