Tag: mitigation plans

April 1, 2022

Allegheny County Health Dept. Announces Approval of Re-Submitted Mon Valley Air Pollution Episiode Plans

February 3, 2022

<UPDATED> Allegheny County Air Quality Program Approves 10 Mon Valley Episode Rule Plans, Rejects Six

February 2, 2022

Allegheny County Health Department Tells U.S. Steel, Others that Mon Valley Air Pollution Mitigation Plans Unacceptable, Orders Modifications