Columbia Gas of Massachusetts

==Springfield Gas Light Company==
===1847-1974===
==Bay State Gas==
===1974–2010===
The Springfield Gas Light Company merged with four other companies - Brockton Taunton Gas Company, the Northampton Gas Light Company and the Lawrence Gas Company - adopting the Bay State Gas name in 1974.
==Columbia Gas of Massachusetts==
===2010–present===
In August 2010, it was announced that Bay State Gas would become Columbia Gas of Masschusetts.
* Bay State Gas Company to become Columbia Gas of Massachusetts - Columbia Gas of Massachusetts, August 11, 2010
Category:Energy companies in the United States
Category:Energy