Montana Water - General regulations & environmental compliance analysis

Montana Water - General: What you need to know

Governing Law and Regulations

Montana Water Quality Act, Montana Code Annotated (MCA) 75-5-101 to 75-5-1122

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Wastewater: Administrative Rules of Montana (ARM) 17.30.1301 to 17.30.2006

Effluent limitations: ARM 17.30.1206 and ARM 17.30.1207

Thermal discharges: ARM 17.30.606

Pretreatment standards: ARM 17.30.1401 to 17.30.1426

Stormwater permits: ARM 17.30.1101 to 17.30.1117

Agricultural (Ag) waste: ARM 17.30.1330

Bioassays and biomonitoring: ARM 17.30.646

Wastewater system operator: ARM 17.40.203 to 17.40.215

Groundwater: ARM 17.30.1001 to 17.30.1045

Water well drillers: ARM 36.21.101 to 36.21.810

Drinking water: ARM 17.38.201 to 17.38.312

Water operator certifications: ARM 17.40.206 to 17.40.215

Oil spills: ARM 17.30.1045 and ARM 17.56.501 to 17.56.508

Wetlands: ARM 17.24.751

On-site wastewater systems: ARM 17.36.911 to 17.36.924

System requirements: ARM 17.36.914

Permit obligations: ARM 17.36.920

Local variances: ARM 17.36.922 and ARM 17.36.924

Regulatory Agencies

Montana Department of Environmental Quality (DEQ) Permitting and Compliance Division Water Protection Bureau

DEQ Board of Environmental Review (Board)

Montana Department of Agriculture (MDA)

U.S. Environmental Protection Agency (EPA) Region 8

U.S. Army Corps of Engineers (Corps)

Local boards of health

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. The Montana Water Quality Act is designed to protect, maintain, and improve the quality of Montana's water resources. The Water Quality Act contains provisions to prevent degradation of water quality and to protect beneficial uses of state water. Pursuant to the Water Quality Act, the Board must establish ...


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