National Grid customers could soon be paying more for their electric and gas bills.

Customers on Long Island using 102 therms of natural gas a month could see a total bill increase of 16.3% or $28.52 if the company's new proposal is approved.

The company says the price hike is needed to focus on providing safe, reliable and affordable energy.

National Grid is also proposing to phase in the proposed increase over multiple years to better manage customer bill impacts.

Hofstra professor of economics Martin Melkonian, says customers and the state commission that would approve or deny the proposed rate hike, should closely scrutinize the reasons National Grid is asking for the increase.

“If you're going to improve efficiency, if you're going to cut out gas leaks, if you're going to meet the energy standards of the state, that's a good reason to seek more revenues,” he says. “The question I have though, is this 60% increase justified?”

The proposal from National Grid still must go through a review process by the state Department of Public Service. If it is approved, the increase would take effect on April first of next year.

National Grid said in a statement, “We’re committed to providing safe, clean and reliable energy for our customers and communities. Above all, supporting our customers remains our top priority, and we have included measures to enhance affordability, especially for our most vulnerable customers. In addition, this proposal demonstrates our commitment to reducing emissions, promoting electrification, and decarbonizing the gas network while progressing new ways of doing business to support New York’s clean energy goals.”