Montana Department of Environmental Quality

The Montana Supreme Court upheld the water use permit for a controversial proposal for a copper mine near the Smith River. The mine is now fully permitted to be built.

The Montana Supreme Court Friday affirmed a lower court ruling finding that state environmental regulators failed to assess the greenhouse gas emissions associated with a fossil fuel power plant.

State environmental regulators are expanding their ability to measure air quality, particularly in rural communities. The latest addition to their network is a permanent monitor in Glasgow.

State environmental regulators have proposed changes to how they assess pollutants that can kill aquatic species in rivers and streams. Environmental groups worry the methods aren’t scientifically sound.

Schools kept students inside for recess and athletics Monday as a thick blanket of smoke smothered western and central Montana. New research aims to better understand air quality inside schools.

This summer was hot and water levels in many places were low. Those are ripe conditions for harmful algal blooms. But state environmental regulators say reports of blooms are lower than previous years.

MTPR's Ellis Juhlin sits down with the outgoing director of the Montana Department of Environmental Quality.

MTPR's Ellis Juhlin sits down with the incoming director of the Montana Department of Environmental Quality to talk about the plans for her position.

Northwestern Energy recently withdrew from a grant agreement with Montana’s Department of Environmental Quality to build nine high speed electric vehicle chargers across the state.

Montana’s top environmental regulatory agency is under new leadership. The new director takes office amidst ongoing changes, legal challenges and preparations for the next legislative session.