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GREAT FALLS CITY OF

Montana — Community Water System — PWSID: MT0000525

System Information

PWSIDMT0000525
System NameGREAT FALLS CITY OF
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 5, 1980
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityGREAT FALLS
ZIP Code59403
AddressPO BOX 5021
OrganizationMCRADY, CODY
Phone406-727-1325

Population & Service

Population Served60,000
Service Connections22,477

Drinking Water Violations (25)

This water system has 25 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
Apr 1, 2019 Jun 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No 61 UG/L 0.060 mg/L 60 Resolved Jun 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2019 Jun 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No 61 UG/L 0.060 mg/L 60 Resolved Jun 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2019 Jun 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No 61 UG/L 0.060 mg/L 60 Resolved Jun 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No 72.5 UG/L 0.060 mg/L 60 Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No 72.5 UG/L 0.060 mg/L 60 Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No 72.5 UG/L 0.060 mg/L 60 Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2018 Dec 31, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 74.8 UG/L 0.060 mg/L 60 Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2018 Dec 31, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 74.8 UG/L 0.060 mg/L 60 Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2018 Dec 31, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 74.8 UG/L 0.060 mg/L 60 Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 73.8 UG/L 0.060 mg/L 60 Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 73.8 UG/L 0.060 mg/L 60 Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 73.8 UG/L 0.060 mg/L 60 Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 60.5 UG/L 0.060 mg/L 60 Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 60.5 UG/L 0.060 mg/L 60 Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 60.5 UG/L 0.060 mg/L 60 Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No 60.5 UG/L 0.060 mg/L 60 Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2002 Dec 31, 2010 Asbestos MR No Yes — 7 MFL — Archived Dec 31, 2010 Inorganic Chemicals
Aug 1, 1997 Aug 31, 1997 Surface Water Treatment Rule TT Yes No — — — Resolved Aug 31, 1997 Surface Water Treatment Rule
Aug 1, 1997 Aug 31, 1997 Surface Water Treatment Rule TT Yes No — — — Resolved Aug 31, 1997 Surface Water Treatment 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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