Hours Of Operations Green Mountain Energy Pennsylvania Green Mountain Energy Hours of Operation and Locations in Pennsylvania 4.9 - 20 votes 1 Locations in Pennsylvania www.greenmountain.com Green Mountain Energy Hours Category: Home & Garden Green Mountain Energy - Pittsburgh, PA 15203 3859 S Water St(412) 586-7554 View Store Details Recommend For You Matheson Tri-Gas Peoples Gas United Power Aero Energy Dayton Power & Light Duke Energy Entergy Ferrellgas Toys R Us A Finishing Touch