Montana Department of Environmental Quality at Montana Department of Environmental Quality

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This document is a Montana Ground Water Pollution Control System (MGWPCS) permit, MTX000278, issued by the Montana Department of Environmental Quality to the Town of Manhattan. The permit authorizes the discharge from the Manhattan Wastewater Reclamation Facility, located in Gallatin County, into Class I ground water. It establishes specific effluent limits (e.g., for Nitrogen), monitoring and reporting requirements for both effluent and ground water quality, and outlines special conditions for outfall construction and monitoring well management. The permit is effective from October 01, 2024, to September 30, 2029, and includes various compliance responsibilities, general requirements, and definitions related to water quality and environmental protection.

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This document is an Authorization to Discharge under the Montana Pollutant Discharge Elimination System, issued by the Montana Department of Environmental Quality to the U.S. Army Corps of Engineers for the Libby Dam Project. The permit authorizes discharge of wastewaters into the Kootenai River, specifying effluent limitations, monitoring requirements, and other conditions for various outfalls (001, 002, 003A-E). The permit is effective from October 1, 2021, to September 30, 2026, and includes compliance responsibilities, monitoring procedures, general requirements, and definitions.

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This document is a Montana Pollutant Discharge Elimination System (MPDES) permit, Permit No. MT0028720, issued by the Montana Department of Environmental Quality to the City of Helena. It authorizes the City to discharge from the Tenmile Water Treatment Plant to receiving waters, groundwater, and an unnamed tributary to Tenmile Creek. The permit details specific effluent limitations, monitoring requirements, reporting procedures, and various compliance responsibilities and general requirements. The effective date of the permit is July 1, 2022, and it is set to expire at midnight on June 30, 2027.

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This document is a Final Title V Operating Permit issued by the Montana Department of Environmental Quality (DEQ) to Flathead Electric Cooperative for its LFGE Facility in Kalispell, Montana. The permit, effective from December 23, 2025, to December 23, 2030, outlines general information, descriptions of emissions units (two CAT 3520C Gensets and a PEI Enclosed Flare), specific permit conditions, non-applicable requirements, and general permit conditions including compliance, certification, monitoring, and reporting requirements. The facility's primary business is the generation of electricity for sale by combusting landfill gas and is subject to various air quality standards and limitations.