Allegheny County no longer has dirty air, according to US environmental regulators

US environmental regulators are proposing to declare Allegheny County, Pennsylvania, has met federal air quality standards for fine particulate matter. This means the county will no longer be subject to special federal requirements for improving air quality.

For years, Allegheny County has been under federal mandates to clean up its air. This proposed change means the county has officially met the 2012 standard for fine particulate matter. It also means the county will no longer have to submit plans to the US environmental regulators detailing how it will reduce pollution.