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ST IGNATIUS TOWN OF

Montana — Community Water System — PWSID: MT0001740

System Information

PWSIDMT0001740
System NameST IGNATIUS TOWN OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 5, 1980
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityST IGNATIUS
ZIP Code59865
AddressPO BOX 103
OrganizationWALKER, AMBERLY
Phone406-745-3791

Population & Service

Population Served700
Service Connections291

Drinking Water Violations (168)

This water system has 168 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
Sep 1, 2025 Sep 30, 2025 Groundwater Rule MR No Yes — — — Resolved Sep 30, 2025 Ground Water Rule
Sep 1, 2025 Sep 30, 2025 Groundwater Rule MR No Yes — — — Resolved Sep 30, 2025 Ground Water Rule
Sep 1, 2025 Sep 30, 2025 Groundwater Rule MR No Yes — — — Resolved Sep 30, 2025 Ground Water Rule
Jul 17, 2024 — E. COLI MR No Yes — — — Resolved Sep 25, 2024 Ground Water Rule
Jul 17, 2024 — E. COLI MR No Yes — — — Resolved Sep 25, 2024 Ground Water Rule
Jul 17, 2024 — E. COLI MR No Yes — — — Resolved Sep 25, 2024 Ground Water Rule
Jan 1, 2024 Dec 31, 2024 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2024 Nitrate Rule
Oct 1, 2022 — Lead and Copper Rule MR No No — TT — Resolved Jul 8, 2024 Lead and Copper Rule
Oct 1, 2022 — Lead and Copper Rule MR No No — TT — Resolved Jul 8, 2024 Lead and Copper Rule
Oct 1, 2022 — Lead and Copper Rule MR No No — TT — Resolved Jul 8, 2024 Lead and Copper Rule
Jul 1, 2020 Jul 31, 2020 Groundwater Rule MR No Yes — — — Resolved Jul 31, 2020 Ground Water Rule
Jul 1, 2020 Jul 31, 2020 Groundwater Rule MR No Yes — — — Resolved Jul 31, 2020 Ground Water Rule
Jul 1, 2020 Jul 31, 2020 Groundwater Rule MR No Yes — — — Resolved Jul 31, 2020 Ground Water Rule
Jul 1, 2020 Jul 31, 2020 Groundwater Rule MR No Yes — — — Resolved Jul 31, 2020 Ground Water Rule
Sep 1, 2019 Aug 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Aug 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2019 Aug 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Aug 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2019 Aug 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Aug 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2019 Aug 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Aug 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2019 Aug 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Aug 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2019 Aug 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Aug 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2016 Oct 31, 2016 Groundwater Rule TT Yes No — — — Resolved Oct 31, 2016 Ground Water Rule
Oct 1, 2016 Oct 31, 2016 Groundwater Rule TT Yes No — — — Resolved Oct 31, 2016 Ground Water Rule
Oct 1, 2016 Oct 31, 2016 Groundwater Rule TT Yes No — — — Resolved Oct 31, 2016 Ground Water Rule
Mar 1, 2016 Mar 31, 2016 Groundwater Rule TT Yes No — — — Resolved Mar 31, 2016 Ground Water Rule
Mar 1, 2016 Mar 31, 2016 Groundwater Rule TT Yes No — — — Resolved Mar 31, 2016 Ground Water Rule
Mar 1, 2016 Mar 31, 2016 Groundwater Rule TT Yes No — — — Resolved Mar 31, 2016 Ground Water Rule
Jan 1, 2016 Mar 31, 2016 OXAMYL MR No Yes — 0.2 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Simazine MR No Yes — 0.004 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Simazine MR No Yes — 0.004 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Simazine MR No Yes — 0.004 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Picloram MR No Yes — 0.5 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 2,4-D MR No Yes — 0.07 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 2,4-D MR No Yes — 0.07 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 2,4-D MR No Yes — 0.07 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Aldicarb MR No Yes — — — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Carbofuran MR No Yes — 0.04 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Carbofuran MR No Yes — 0.04 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Dinoseb MR No Yes — 0.007 mg/L — Resolved Mar 31, 2016 Synthetic Organic Chemicals
Jan 1, 2016 Mar 31, 2016 Aldicarb sulfone MR No Yes — — — Resolved Mar 31, 2016 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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