Governing Law and Regulations
Montana Department of Environmental Quality (DEQ) Permitting and Compliance Division Water Protection Bureau
DEQ Board of Environmental Review (Board)
DEQ Water Pollution Control Advisory Council
U.S. Environmental Protection Agency (EPA) Region 8
See ADDRESSES & CONTACTS for addresses and telephone numbers.
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Montana has adopted by reference the federal effluent limitations; however, the state effluent limitations apply to both surface and groundwater discharges. The state's Montana Pollutant Discharge Elimination System (MPDES) requirements mandate that best available technology (BAT) be used to treat effluent for the removal of certain pollutants. Typically, all MPDES permits must be renewed every 5 years, with the Montana Department of Environmental Quality (DEQ) reviewing all applications to ensure that the discharges would not cause a violation of water quality in the receiving stream.
The state has adopted and incorporated by reference the federal standards that are applicable to owners and operators of specified point ...