Questions about thousands of customers, who went months without bills from National Grid this winter, got Massachusetts state regulators to crack down.

National Grid -- the state's largest gas utility -- is being hit with millions of dollars in penalties from Massachusetts for ...

A spokesperson for the Department of Public Utilities told Boston 25 News that National Grid has proposed to pay back $15 ...

The state is ordering National Grid to fix "severe billing errors" affecting thousands of its gas customers in Massachusetts.

The company failed to send timely bills to the tens of thousands of customers this winter due to an issue in its customer billing system. That means many will see those charges waived.

National Grid’s problems began in November, “due to a deficiency in its customer billing system related to the ‘crossover’ from off-peak to peak rates on November 1,” the letter said.