The Weld County commissioners this week petitioned for a review of the Environmental Protection Agency’s final decision to extend the Denver Metro/North Front Range ozone nonattainment area to include ...

Weld County officials will review their options to continue fighting a federal decision to add northern Weld to the Denver metro and north Front Range’s designation for failing to meet federal ozone ...

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EPA recently redesignated the Northern Wasatch Front and the Uinta Basin ozone nonattainment areas based on data demonstrating that the areas failed to meet the 2015 ozone National Ambient Air Quality ...

The Environmental Protection Agency this week designated the Uinta Basin in northeastern Utah as a nonattainment area for ground-level ozone pollution, while agreeing with Colorado's recommendation ...

News-Miner opinion: The news that the state is seeking to split the borough nonattainment in two is the latest wrinkle in an ongoing fight to clean up the area’s air that has itself been, in a word, ...