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WILSALL WATER DISTRICT

Montana — Community Water System — PWSID: MT0000362

System Information

PWSIDMT0000362
System NameWILSALL WATER DISTRICT
System TypeCommunity Water System
Water SourceGround Water Under Influence
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityWILSALL
ZIP Code59086
AddressPO BOX 388
OrganizationPOPE, DESIREE
Phone—

Population & Service

Population Served250
Service Connections130

Drinking Water Violations (152)

This water system has 152 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 Oct 31, 2025 Surface Water Treatment Rule TT Yes No — — — Archived Oct 31, 2025 Surface Water Treatment Rule
Oct 1, 2025 Oct 31, 2025 Surface Water Treatment Rule TT Yes No — — — Archived Oct 31, 2025 Surface Water Treatment Rule
Sep 1, 2025 Sep 30, 2025 Surface Water Treatment Rule TT Yes No — — — Archived Sep 30, 2025 Surface Water Treatment Rule
Sep 1, 2025 Sep 30, 2025 Surface Water Treatment Rule TT Yes No — — — Archived Sep 30, 2025 Surface Water Treatment Rule
Sep 1, 2025 Sep 30, 2025 Surface Water Treatment Rule MR No No — — — Archived Sep 30, 2025 Surface Water Treatment Rule
Sep 1, 2025 Sep 30, 2025 Surface Water Treatment Rule MR No No — — — Archived Sep 30, 2025 Surface Water Treatment Rule
Aug 1, 2025 Aug 31, 2025 Surface Water Treatment Rule MR No No — — — Archived Aug 31, 2025 Surface Water Treatment Rule
Aug 1, 2025 Aug 31, 2025 Surface Water Treatment Rule MR No No — — — Archived Aug 31, 2025 Surface Water Treatment Rule
Oct 3, 2019 — Surface Water Treatment Rule TT Yes No — — — Addressed — Surface Water Treatment Rule
Oct 3, 2019 — Surface Water Treatment Rule TT Yes No — — — Addressed — Surface Water Treatment Rule
Oct 3, 2019 — Surface Water Treatment Rule TT Yes No — — — Addressed — Surface Water Treatment Rule
Oct 3, 2019 — Surface Water Treatment Rule TT Yes No — — — Addressed — Surface Water Treatment Rule
Apr 1, 2018 Jun 30, 2018 Nitrate-Nitrite MCL Yes No 10.6 MG/L — 10 Resolved Jan 17, 2018 Nitrate Rule
Apr 1, 2018 Jun 30, 2018 Nitrate-Nitrite MCL Yes No 10.6 MG/L — 10 Resolved Jan 17, 2018 Nitrate Rule
Apr 1, 2018 Jun 30, 2018 Nitrate-Nitrite MCL Yes No 10.6 MG/L — 10 Resolved Jan 17, 2018 Nitrate Rule
Jul 1, 2013 Sep 30, 2013 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2011 Dec 31, 2013 Asbestos MR No Yes — 7 MFL — Resolved Dec 31, 2013 Inorganic Chemicals
Jan 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Apr 12, 2011 Lead and Copper Rule
Jan 1, 2011 Dec 31, 2013 Asbestos MR No Yes — 7 MFL — Resolved Dec 31, 2013 Inorganic Chemicals
Jan 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Apr 12, 2011 Lead and Copper Rule
Jan 1, 2011 Dec 31, 2013 Asbestos MR No Yes — 7 MFL — Resolved Dec 31, 2013 Inorganic Chemicals
Oct 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 3, 2010 Consumer Confidence Rule
Oct 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 3, 2010 Consumer Confidence Rule
Oct 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 3, 2010 Consumer Confidence Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 3, 2010 Consumer Confidence Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 3, 2010 Consumer Confidence Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 3, 2010 Consumer Confidence Rule
Jan 1, 2008 Dec 31, 2008 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 — Lead and Copper Rule MR No No — TT — Resolved Nov 4, 2008 Lead and Copper Rule
Jan 1, 2008 Dec 31, 2008 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Dec 31, 2008 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Dec 31, 2008 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Jun 30, 2008 Lead and Copper Rule MR No No — TT — Resolved Jun 30, 2008 Lead and Copper Rule
Jan 1, 2008 Jun 30, 2008 Lead and Copper Rule MR No No — TT — Resolved Jun 30, 2008 Lead and Copper Rule
Jan 1, 2008 Jun 30, 2008 Lead and Copper Rule MR No No — TT — Resolved Jun 30, 2008 Lead and Copper Rule
Jan 1, 2008 — Lead and Copper Rule MR No No — TT — Resolved Nov 4, 2008 Lead and Copper Rule
Jan 1, 2008 Dec 31, 2008 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 — Lead and Copper Rule MR No No — TT — Resolved Nov 4, 2008 Lead and Copper Rule
Jan 1, 2008 Dec 31, 2008 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Dec 31, 2008 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Dec 31, 2008 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts 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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