Montana Department of Environmental Quality About Us Permitting & Operator Assistance Public Participation

Permitting & Operator Assistance

A Healthy Environment for a Thriving Montana

The right to a healthy environment is enshrined in Montana's Constitution, which directs the state and every person to "maintain and improve a clean and healthful environment in Montana for present and future generations." The values behind this directive are part of what make Montana such a great place to live, work, and play.

The Department of Environmental Quality administers most of Montana's environmental, cleanup, monitoring, pollution prevention, and energy conservation laws and regulations. We do so in a way that seeks to ensure environmentally responsible economic opportunity continues to drive growth, investment, and thriving communities in our state.

Here at Montana DEQ, we understand that environmental regulations can be complicated and often differ slightly from state to state or between federal, state, and local levels. We also recognize that the regulations governing our work have a direct impact on businesses, local governments, and all Montanans. DEQ staff are here to help you navigate these regulations. We know you expect the highest level of service from your state government and we seek to consistently meet or exceed your expectations.

Environmental Permitting at DEQ

This page serves as a one-stop-shop listing all of the regulatory products administered by DEQ. The information on this page is provided as a resource to anyone who may be seeking a permit, license, or other authorization to operate under Montana's environmental laws. The links below will connect you with more detailed information across our website that we hope will be helpful. Of course, if you do not find what you are looking for or still have questions, you can always contact us. We would love to speak with you about what environmental requirements may apply to your business or project.

  Contact DEQ

An additional resource that may be helpful is the Montana Index of Environmental Permits. The 22nd Edition of this document was published by the Legislature's Environmental Quality Council in 2020 and provides an index, by industry sector, of all environmental permits across Montana state agencies. 

Air Permits & Registration

  • Montana Air Quality Permit (MAQP)
  • Air Quality Title V Operating Permit
  • Air Quality Registration - Oil & Gas Facilities
  • Air Quality Registration - Crushers & Screens
  • Air Quality Registration - Concrete Batch Plants
  • Air Quality Registration - Asphalt Plants
  • Open Burning Permits

Asbestos Accreditation, Permits & Notifications

  • Asbestos Inspector Accreditation
  • Asbestos Project Permit
  • Demolition Notification - No Asbestos
  • Emergency Renovation Notification
  • Quantity Addendum
  • Waste Shipment Record
  • Alternate Work Practices Request
  • Annual Asbestos Project Permit

Hazardous Waste Permits & Registration

  • Notification of RCRA Subtitle C Activity Form (EPA Form 8700-12)
  • RCRA Hazardous Waste Part A Permit Application (EPA Form 8700-23)
  • Hazardous Waste Transporter Registration
  • Halogenated Solvent User Registration

Mining Permits & Licenses

  • Coal Mining - Prospecting Notice of Intent
  • Coal Mining - Surface Mine Permit
  • Coal Mining - Blaster Certification
  • Hard Rock Mining - Operating Permit
  • Hard Rock Mining - Exploration License
  • Hard Rock Mining - Small Miner Exclusion Statement
  • Opencut Mining - Standard Permit
  • Opencut Mining - Rural Permit

Solid Waste Licenses

  • Class II Solid Waste Management System License (also Major Composter)
  • Class II Transfer Station License
  • Class III Solid Waste Management System License
  • Class IV Solid Waste Management System License
  • Small Composter Operation License
  • Household Hazardous Waste or E-Waste Collection Event License
  • Soil Treatment Facility (Landfarm) License
  • Small Biodiesel License
  • Recycling Facility License
  • Septic Tank, Cesspool, and Privy Cleaner License
  • Septic Tank, Cesspool, and Privy Cleaner Disposal Site Approval
  • Beneficial Use of Industrial Waste/By-Products Determination
  • Infectious Waste Transporter Registration

Underground Storage Tank Permits, Notifications & Operator Licensing

  • UST Operator License
  • Notification of Underground Storage Tanks
  • Product Change Notification
  • Minor Installation Permit
  • Major Installation Permit
  • Closure Permit

Water Permits, Authorizations & Operator Certification

  • Montana Pollutant Discharge Elimination System Permit (MPDES)
    • General Permits for Discharges to Surface Water
      • Concentrated Animal Feeding Operations (CAFO) - MTG010000
      • Construction Dewatering - MTG070000
      • Disinfected Water & Hydrostatic Testing – MTG770000
      • Domestic Sewage Treatment Lagoons – MTG580000, MTG581000
      • Fish Farms - MTG130000
      • Pesticides – MTG870000
      • Petroleum Cleanup Discharges - MTG790000
      • Produced Water from Oil and Gas Production - MTG310000
      • Sand and Gravel - MTG490000
      • Stormwater (including Municipal Separate Storm Sewer System or MS4) - MTR100000, MTR000000, MTR040000
      • Suction Dredges - MTG370000
    • Individual Permit for Discharges to Surface Water
  • Montana Groundwater Pollution Control System (MGWPCS)
  • 401 Water Quality Certification
  • Temporary Turbidity (318 Authorization)


  •  Operator Certification
    • Water Distribution System Operator
    • Water Treatment System Operator
    • Wastewater System Operator
    • Industrial Wastewater Treatment Operator
    • On-site Wastewater System Operator

Other Permits & Approvals

  • Major Facility Siting Act Certificate of Compliance
  • Wind & Solar Generation Facility Decommissioning & Bonding