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MISSION HOUSING WATER SYSTEM

Montana — Community Water System — PWSID: 083090043

System Information

PWSID083090043
System NameMISSION HOUSING WATER SYSTEM
System TypeCommunity Water System
Water SourceGround Water
Activity StatusNon-Inventory
Owner TypeNative American
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 4, 1980
Last ReportedNov 17, 2025

Location & Contact

StateMontana
CityHARLEM
ZIP Code59526
Address—
OrganizationNICHOLSON, MARGARET
Phone406-353-8313

Population & Service

Population Served170
Service Connections32

Drinking Water Violations (125)

This water system has 125 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
Jan 1, 2008 Jan 1, 2010 Styrene MR No Yes — 0.1 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Nitrate MR No No — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2010 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Xylenes, Total MR No Yes — 10 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Xylenes, Total MR No Yes — 10 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Glyphosate MR No Yes — 0.7 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Glyphosate MR No Yes — 0.7 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Nitrite MR No No — 1 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2010 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Benzene MR No Yes — 0.005 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Benzene MR No Yes — 0.005 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Toluene MR No Yes — 1 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Toluene MR No Yes — 1 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Nitrate-Nitrite MR No No — — — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Jan 1, 2010 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Jan 1, 2010 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Jan 1, 2010 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Jan 1, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Simazine MR No Yes — 0.004 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Simazine MR No Yes — 0.004 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Jan 1, 2010 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Jan 1, 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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