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GRASS RANGE TOWN OF

Montana — Community Water System — PWSID: MT0000231

System Information

PWSIDMT0000231
System NameGRASS RANGE TOWN OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityGRASS RANGE
ZIP Code59032
AddressPO BOX 807
OrganizationCUSHING, BECKY
Phone406-428-2174

Population & Service

Population Served102
Service Connections88

Drinking Water Violations (196)

This water system has 196 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, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 19, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 19, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 19, 2024 Lead and Copper Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 18, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 18, 2023 Consumer Confidence Rule
Jan 1, 2023 Dec 31, 2025 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2023 Nitrate Rule
Jan 1, 2023 Dec 31, 2023 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2023 Nitrate Rule
Jan 1, 2023 Dec 31, 2023 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2023 Nitrate Rule
Jan 1, 2023 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2023 Nitrate Rule
Jan 1, 2023 Dec 31, 2025 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Aug 7, 2020 Consumer Confidence Rule
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Aug 7, 2020 Consumer Confidence Rule
Jul 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Jul 19, 2016 Consumer Confidence Rule
Jul 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Jul 19, 2016 Consumer Confidence Rule
Jul 1, 2015 — Consumer Confidence Rule Other No No — — — Resolved Jul 20, 2015 Consumer Confidence Rule
Jul 1, 2015 — Consumer Confidence Rule Other No No — — — Resolved Jul 20, 2015 Consumer Confidence Rule
Jul 1, 2014 — Consumer Confidence Rule Other No No — — — Resolved Oct 6, 2014 Consumer Confidence Rule
Jul 1, 2014 — Consumer Confidence Rule Other No No — — — Resolved Oct 6, 2014 Consumer Confidence Rule
Oct 1, 2013 — Consumer Confidence Rule Other No No — — — Resolved Mar 28, 2018 Consumer Confidence Rule
Oct 1, 2013 — Consumer Confidence Rule Other No No — — — Resolved Mar 28, 2018 Consumer Confidence Rule
Oct 1, 2013 — Lead and Copper Rule MR No No — TT — Resolved Jun 10, 2014 Lead and Copper Rule
Oct 1, 2013 — Lead and Copper Rule MR No No — TT — Resolved Jun 10, 2014 Lead and Copper Rule
Oct 1, 2013 — Lead and Copper Rule MR No No — TT — Resolved Jun 10, 2014 Lead and Copper Rule
Jan 1, 2011 Dec 31, 2011 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Asbestos MR No Yes — 7 MFL — Resolved Dec 31, 2013 Inorganic Chemicals
Jan 1, 2011 Dec 31, 2011 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Asbestos MR No Yes — 7 MFL — Resolved Dec 31, 2013 Inorganic Chemicals
Jan 1, 2011 Dec 31, 2011 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2011 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2011 Volatile Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Asbestos MR No Yes — 7 MFL — Resolved Dec 31, 2013 Inorganic 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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