Allegheny County's air permit backlog includes U.S. Steel’s Edgar Thomson Works in Braddock, Irvin Works in West Mifflin and Neville Chemical on Neville Island.
Young children and those with respiratory ailments are being urged to stay indoors for a second straight day as smoke from Canadian wildfires continues to shroud Pittsburgh in a fog-like haze. A Code Red air quality alert for fine particulates was issued Thursday for 13 Western Pennsylvania counties by the