Albert Mercado wasn't surprised last month to see an envelope from National Grid in his pile of mail, assuming it was his usual gas bill. He was, however, shocked by the contents.

WALTHAM, Mass. — National Grid is under fire again from Massachusetts customers over billing problems. Numerous gas and electric customers said the utility giant left them in the dark for months ...

National Grid proposes the NESE pipeline to address energy shortages in New York, citing delays in green projects and increased gas reliance.