Governing Law and Regulations
Montana Department of Environmental Quality (DEQ) Permitting and Compliance Division Water Protection Bureau
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 regulates water temperatures under its general surface water quality standards. The state also requires that temperature be part of the state's surface water monitoring system under the Montana Pollutant Discharge Elimination System (MPDES) permit program. The state has adopted the federal pretreatment standards for prohibited discharges, including those discharges resulting from heat. See the national section THERMAL DISCHARGES for more information.
• Administration and enforcement. DEQ's Water Protection Bureau is fully authorized to administer and enforce the state's water quality program, including thermal discharge requirements.
SURFACE WATER QUALITY STANDARDS
ARM 17.30.601 to 17.30.670
Montana has adopted surface water quality standards to conserve water by protecting, maintaining, and improving the quality and potability of water for public water supplies, wildlife, fish and aquatic life, agriculture, industry, recreation, and other beneficial uses. All MPDES applicants must provide detailed information concerning the nature of such ...