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Butler County Air Permits
Title V Operating Permits
AK Steel-Butler Works, Butler Township
Alcoa Commercial Windows (Kawneer Traco), Cranberry Township
Armstrong Cement and Supply, Winfield Township
BNZ Materials, Zelienople Borough
Calumet Penreco, Karns City Borough
MarkWest Liberty-Bluestone LLC, Jackson Township
Mercer Lime-Branchton Plant, Slippery Rock Township
Seneca Landfill, Jackson Township
Slippery Rock University, Slippery Rock Borough
Sonneborn-Petrolia Plant, Petrolia Borough
Waste Management-Northwest Sanitary Landfill, Clay Township
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