Montana NPDES regulations & environmental compliance analysis

Montana NPDES: What you need to know

Governing Law and Regulations

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

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Montana Pollutant Discharge Elimination System (MPDES) permits: Administrative Rules of Montana (ARM) 17.30.1301 to 17.30.1387

Applicability: ARM 17.30.1301

Permit exclusions: ARM 17.30.1310

Permit types: ARM 17.30.1341

Permit application: ARM 17.30.1322

Permitting procedures: ARM 17.30.1364

Permit conditions: ARM 17.30.1312

General conditions: ARM 17.30.1342

Fees: ARM 17.30.201

Confidentiality: ARM 17.30.1321

Nutrient trading: ARM 17.30.1701

Regulatory Agency

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

DEQ Board of Environmental Review (Board)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Montana is authorized to administer portions of the National Pollutant Discharge Elimination System (NPDES) permit program, including state permits, federal facility permits, and general permits. The Montana Pollutant Discharge Elimination System (MPDES) permit system is essentially the equivalent of the federal permit system (NPDES) administered by the U.S. Environmental Protection Agency (EPA). See the national section NPDES PERMIT for more information.

Montana also issues general MPDES permits for stormwater discharges associated with industrial activities, for stormwater discharges associated with construction activities, for stormwater discharges associated with oil, gas, and mining operations, and stormwater discharges from municipal separate storm sewer systems (MS4s). See the state sections STORMWATER—GENERAL, STORMWATER—INDUSTRIAL ...


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