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TRI COUNTY WATER DISTRICT

Montana — Community Water System — PWSID: MT0002912

System Information

PWSIDMT0002912
System NameTRI COUNTY WATER DISTRICT
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedDec 30, 1983
Last ReportedJan 5, 2026

Location & Contact

StateMontana
CityPOWER
ZIP Code59468
Address1002 4TH LANE NE
OrganizationGRILLEY, CLIFTON H
Phone—

Population & Service

Population Served470
Service Connections177

Drinking Water Violations (213)

This water system has 213 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
Dec 30, 2024 — Lead and Copper Rule MR No No — TT — Resolved Feb 4, 2025 Lead and Copper Rule
Dec 30, 2024 — Lead and Copper Rule MR No No — TT — Resolved Feb 4, 2025 Lead and Copper Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 31, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 31, 2023 Consumer Confidence Rule
Jan 1, 2023 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 22, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 22, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 22, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 22, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 22, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 22, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 22, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 22, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Aug 31, 2018 Lead and Copper Rule
Oct 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Aug 31, 2018 Lead and Copper Rule
Oct 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Aug 31, 2018 Lead and Copper Rule
Dec 30, 2014 — Lead and Copper Rule MR No No — TT — Resolved Feb 3, 2015 Lead and Copper Rule
Dec 30, 2014 — Lead and Copper Rule MR No No — TT — Resolved Feb 3, 2015 Lead and Copper Rule
Jan 1, 2014 Dec 31, 2016 Beryllium, Total MR No Yes — 0.004 mg/L — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 Mercury MR No Yes — 0.002 mg/L — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Archived Dec 31, 2016 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2016 Antimony, Total MR No Yes — 0.006 mg/L — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 Thallium, Total MR No Yes — 0.002 mg/L — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 Cadmium MR No Yes — 0.005 mg/L — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 Nickel MR No Yes — — — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 Barium MR No Yes — 2 mg/L — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 Chromium MR No Yes — 0.1 mg/L — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 Fluoride MR No Yes — 4.0 mg/L — Archived Dec 31, 2016 Inorganic Chemicals
Jan 1, 2012 Mar 31, 2012 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2012 Radionuclides and Revised Rad Rule
Jan 1, 2012 Mar 31, 2012 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2012 Radionuclides and Revised Rad Rule
Jan 1, 2012 Mar 31, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2012 Radionuclides and Revised Rad Rule
Jan 1, 2012 Mar 31, 2012 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2012 Radionuclides and Revised Rad Rule
Jan 1, 2012 Mar 31, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2012 Radionuclides and Revised Rad Rule
Jan 1, 2012 Mar 31, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2012 Radionuclides and Revised Rad Rule
Jan 1, 2011 Mar 31, 2011 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2011 Radionuclides and Revised Rad Rule
Jan 1, 2011 Mar 31, 2011 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2011 Radionuclides and Revised Rad Rule
Jan 1, 2011 Mar 31, 2011 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2011 Radionuclides and Revised Rad Rule
Jan 1, 2011 Mar 31, 2011 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2011 Radionuclides and Revised Rad Rule
Jan 1, 2011 Mar 31, 2011 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2011 Radionuclides and Revised Rad Rule
Jan 1, 2011 Mar 31, 2011 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2011 Radionuclides and Revised Rad Rule
Oct 1, 2010 Dec 31, 2010 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Oct 1, 2010 Dec 31, 2010 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Oct 1, 2010 Dec 31, 2010 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Oct 1, 2010 Dec 31, 2010 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Oct 1, 2010 Dec 31, 2010 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Oct 1, 2010 Dec 31, 2010 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Jan 1, 2010 Dec 31, 2010 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2010 Dec 31, 2010 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2010 Dec 31, 2010 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2010 Dec 31, 2010 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2010 Dec 31, 2010 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2010 Volatile 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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