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CROW AGENCY WATER SYSTEM

Montana — Community Water System — PWSID: 083090011

System Information

PWSID083090011
System NameCROW AGENCY WATER SYSTEM
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeFederal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 4, 1980
Last ReportedNov 17, 2025

Location & Contact

StateMontana
CityCROW AGENCY
ZIP Code59022
AddressP.O. Box 129
OrganizationSTOPS, JR., MARVIN (WES)
Phone406-697-4765

Population & Service

Population Served1,300
Service Connections510

Drinking Water Violations (225)

This water system has 225 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
Jul 1, 2025 Jul 31, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Archived Jul 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2025 May 31, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2025 Feb 28, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2025 Jan 31, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2024 Nov 30, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Aug 29, 2023 Consumer Confidence Rule
Jun 1, 2023 Jun 30, 2023 Interim Enhanced Surface Water Treatment Rule MR No No — — — Resolved Jun 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2023 Jun 30, 2023 CARBON, TOTAL MR No Yes — TT — Resolved Jun 30, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2023 Jun 30, 2023 CARBON, TOTAL MR No Yes — TT — Resolved Jun 30, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2023 Jun 30, 2023 CARBON, TOTAL MR No Yes — TT — Resolved Jun 30, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Mar 1, 2023 Mar 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2023 Dec 31, 2023 Cadmium MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Barium MR No Yes — 2 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 Nickel MR No Yes — — — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 Mercury MR No Yes — 0.002 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 Selenium MR No Yes — 0.05 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Thallium, Total MR No Yes — 0.002 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2023 Arsenic Rule
Jan 1, 2023 Dec 31, 2023 Beryllium, Total MR No Yes — 0.004 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Chromium MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Inorganic Chemicals
Jan 1, 2023 Dec 31, 2023 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2022 Mar 31, 2022 CARBON, TOTAL MR No Yes — TT — Resolved Mar 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 CARBON, TOTAL MR No Yes — TT — Resolved Mar 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 CARBON, TOTAL MR No Yes — TT — Resolved Mar 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Dec 30, 2021 — Lead and Copper Rule MR No No — TT — Resolved Mar 7, 2022 Lead and Copper Rule
Oct 1, 2020 Dec 31, 2020 CARBON, TOTAL TT Yes No — TT — Resolved Dec 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 CARBON, TOTAL TT Yes No — TT — Resolved Dec 31, 2020 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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