Arizona Department of Environmental Quality

Arizona environmental officials are warning of orange liquid and soil that has started appearing close to the site of a former mine in Yavapai County.

Arizona officials say high levels of E. Coli have declined in Fossil Creek following a prolonged closure of the area because of wildfire.

The Arizona Department of Environmental Quality has approved the renewal of the aquifer protection permit for a uranium mine near the South Rim of the Grand Canyon.

Arizona lawmakers are advancing legislation backed by utilities to have state regulators, not their federal counterparts, regulate disposal of toxic ash produced by coal-fired power plants.

Smoke from the Rafael Fire burning southwest of Flagstaff continues to impact local communities.According to the Arizona Department of Environmental…

Governor Doug Ducey signed legislation this week to establish new clean water rules, following a rollback of federal protections for ephemeral waterways…

State environmental regulators will require owners of a uranium mine near the South Rim of the Grand Canyon to apply for more stringent water protection…

Grand Canyon National Park officials have limited visitation and water use at Phantom Ranch as they overhaul a wastewater treatment facility. It comes…

State officials are warning about elevated mercury levels in a species of fish at a Williams-area lake.The Arizona Department of Environmental Quality…

Flagstaff residents in recent months may have noticed a handful of shuttered gas stations in the city. KNAU’s Ryan Heinsius reports, they’re among nearly…