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WESTBY TOWN OF

Montana — Community Water System — PWSID: MT0000355

System Information

PWSIDMT0000355
System NameWESTBY TOWN OF
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityWESTBY
ZIP Code59275
AddressPO BOX 186
OrganizationEKNESS, JEFFREY
Phone406-385-2445

Population & Service

Population Served172
Service Connections106

Drinking Water Violations (606)

This water system has 606 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
Jan 1, 2022 Mar 31, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2019 Arsenic Rule
Jul 1, 2019 Sep 30, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2019 Arsenic Rule
Jul 1, 2019 Sep 30, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2019 Arsenic Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Dec 30, 2015 — Lead and Copper Rule MR No No — TT — Resolved Feb 1, 2016 Lead and Copper Rule
Dec 30, 2015 — Lead and Copper Rule MR No No — TT — Resolved Feb 1, 2016 Lead and Copper Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Jan 1, 2015 Mar 31, 2015 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 Arsenic Rule
Oct 1, 2014 Dec 31, 2014 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 Arsenic Rule
Oct 1, 2014 Dec 31, 2014 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 Arsenic Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Oct 23, 2014 Lead and Copper Rule
Oct 1, 2014 Dec 31, 2014 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 Arsenic Rule
Oct 1, 2014 Dec 31, 2014 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 Arsenic Rule
Oct 1, 2014 Dec 31, 2014 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 Arsenic Rule
Oct 1, 2014 Dec 31, 2014 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 Arsenic Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Oct 23, 2014 Lead and Copper Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Oct 23, 2014 Lead and Copper Rule
Oct 1, 2014 Dec 31, 2014 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 Arsenic Rule
Oct 1, 2014 Dec 31, 2014 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Jul 1, 2014 Sep 30, 2014 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 Arsenic Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule

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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