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


Program Overview

Access to clean water is essential to human health and to Montana’s economy. We support and implement measures to conserve this valuable resource and ensure that clean lakes, streams, and rivers remain part of Montana’s natural heritage.

Water Permitting

If you are looking for information or forms related to specific water permits, such as surface water discharge permits (MPDES) or groundwater discharge permits (MGWPCS), visit the Water Permitting and Operator Assistance page. The page can be accessed by navigating through the drop down menu above, or by clicking the gray button below the list of contacts.


Water Quality Division

Main Number
(406) 444-5546

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