The EPA has issued nationwide standards that create enforceable limits on per-and polyfluoroalkyl substances (PFAS) in drinking water. States will have five years to carry out water testing and PFAS mitigation efforts under the new federal rules.

Montana school counselors, teachers and students are suing the state over a law that changed sex education policies. The plaintiffs say the law has a “chilling” effect on discussion of human sexuality in schools.

The federal government is reviewing a plan to capture 150 million tons of carbon dioxide in Wyoming and store it underground in eastern Montana. The project, aimed at mitigating greenhouse gas emissions, is raising objections from local ranchers.

Montana’s frontier days were stuffed with gold, greed and political corruption — and all three played a part in drawing the state’s western boundary with Idaho. A listener wants to know how that squiggly line came to be. Find out now on The Big Why.

State utility regulators Monday heard public testimony on a petition asking them to consider climate change impacts as part of their decision-making.

The presumed Republican frontrunner in Montana’s U.S. Senate race told the Washington Post he lied to a national park ranger about the origin of a bullet wound in his arm.

Montana Highway 41, from Dillon to Twin Bridges is closed indefinitely to through traffic. The University of Montana and U.S. Justice Department reached a settlement on violations over access to the university's Adams Center for persons with disabilities.

A campaign for a constitutional abortion rights amendment in Montana may soon begin collecting signatures to put the measure before voters this fall. But that process has been pushed back by Republican officials challenging the initiative’s content and by legal rulings.

Montana State University broke ground Friday on a new nursing school in Missoula.

More than 30 business leaders and government officials met in Missoula Friday to discuss ways to keep western Montana’s wood products industry afloat after two sawmills announced closures.