Our mission is to champion a healthy environment for a thriving Montana. Questions?

Mar 10, 2025 · Contact information for public-facing positions at the Montana Department of Environmental Quality.

The Public Water Supply Bureau at DEQ regulates public water systems in Montana to ensure that the water being served meets federal Safe Drinking Water Act and state laws and regulations.

Discover, analyze and download data from Discover DEQ's Data. Download in CSV, KML, Zip, GeoJSON, GeoTIFF or PNG. Find API links for GeoServices, WMS, and WFS. Analyze with charts and thematic maps. Take the next step and create storymaps and webmaps.

Welcome to EmissionsOnline.mt.gov, your online tool for entering air emissions for your permitted/registered facility. For any questions/comments concerning the functionality of this web site or instructions on how to perform actions on this web site, please contact the Montana Department of Environment Quality - Air Quality Bureau at: (406 ...

Montana DEQ works closely with stakeholders to implement regulations for various aspects of above ground and underground storage tank systems, including construction, installation, and operation as well as identification and cleanup of associated …

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.

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.

Jan 22, 2025 · The Montana Department of Environmental Quality (DEQ) is seeking applications for approximately $1 million in funding for nonpoint source pollution reduction projects. The deadline for eligible applicants to submit draft applications is March 7, 2025.

DEQ has completed several years of water quality sampling for sediment, temperature, nutrients, and metals in cooperation with the Beaverhead Watershed Committee and others.