Two Arizona tribes are suing the federal government over the decision by the Trump administration to dilute water quality rules. The lawsuit filed in federal court in Phoenix claims the Environmental Protection Agency and the Army Corps of Engineers, at ...

In the middle of any crisis, Arizonans expect our leaders to use every tool at their disposal to do what is best for our communities. But as the coronavirus pandemic impacts all Arizonans, President Trump’s Environmental Protection Agency is taking ...

The Arizona Department of Environmental Quality expects reductions in grant funding from the federal Environmental Protection Agency, but a lack of specifics have impeded planning.

Washington’s top regulatory cop is at it again. The Environmental Protection Agency is pushing an obscure regulation that aims to duplicate the responsibilities of other federal agencies and preempt state authority, potentially driving an important industry out of business.

U.S. Sen. John McCain on Friday called for a criminal investigation into actions by the Environmental Protection Agency that led to a mine spill polluting rivers in three Western states last summer.

The Arizona Corporation Commission, represented by Attorney General Mark Brnovich, is suing the Environmental Protection Agency over a federal rule designed to reduce carbon emissions.

The Environmental Protection Agency’s reduction of its limit for ground-level ozone will put an additional seven Arizona counties out of compliance and pose a significant challenge, an official said Friday.

The focus on a toxic mine spill that fouled rivers in three Western states shifts to Congress this week as lawmakers kick off a series of hearings into how the U.S. Environmental Protection Agency accidentally unleashed the deluge of poisoned water.

A Navajo Nation utility has been fined $25,000 for discharging more pollutants into a waterway than its permit allowed.

In a much anticipated environmental case, a divided U.S. Supreme Court today ruled that the Environmental Protection Agency may not disregard costs in deciding whether to regulate coal-fired plants in order to reduce mercury and other toxic emissions.