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

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.

2025年3月10日 · Contact information for public-facing positions at the Montana Department of Environmental Quality.

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.

This map provides you the ability to interact with feature locations of DEQ's data throughout Montana. You can not only control the map and visible layers but also the ability to discover DEQ's mapped features within a distance of a defined location.

1 天前 · Art Hayes, Jr., who lives in the Tongue River Basin community of Birney, described DEQ’s lack of opposition to HB 587 in the House after the agency spent years defending its own standards in a state and federal court as a “slap in the face to Montana farmers and ranchers.” “The DEQ should stand up and defend these standards and ...

The Department of Environmental Quality (Department) Circular DEQ-7 (DEQ-7) contains numeric water quality standards for Montana's surface and ground waters. The standards were developed in compliance with Section 75-5-301, Montana Code Annotated (MCA) of the Montana Water Quality Act, Section 80-15-201, MCA

Welcome to the Montana DEQ data search tool for the Clean Water Act Information Center (CWAIC). Here you will find information about the quality of Montana's rivers, streams, lakes, and wetlands in relation to Montana's water quality standards.

Water quality standards consist of several parts: Together, the beneficial uses, numeric and narrative standards, and nondegration protections provide the framework for achieving Federal Clean Water Act and Montana Water Quality Act goals and protecting Montana water resources.

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 …