Discharges Associated with Fish Farms

The purpose of the Fish Farm General Permit is to regulate discharge wastewater effluent from fish farms and hatcheries to state waters in accordance with effluent limitations, monitoring requirements, and other conditions set forth in the General Permit. 

All facilities must develop and implement a waste management plan to minimize the discharge of hatchery wastes to state waters. The Fish Farm General Permit is in compliance with the Montana Water Quality Act, Title 75, Chapter 5, Montana Code Annotated (MCA), and the Federal Water Pollution Control Act (the “Clean Water Act”), 33 U.S.C. 1251 et. seq., A written authorization letter from the Department is required before an applicant is authorized to discharge under the General Permit.

Fish Farm
Source: Photo courtesy of Todd Chatman,
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Click the logo to go to FACTS, the Water Protection Bureau’s online system to apply for and manage wastewater and stormwater discharge permits. All permits, individual surface and groundwater as well as general permits, are included in the system.