Casella Waste Systems Inc. said landfill capacity at its Southbridge, Mass., facility can expand by more than one-third, as the state has increased the annual permit limit.

The Rutland, Vt.-based Casella said in a news release the Massachusetts Department of Environmental Protection raised the annual permit limit at the Southbridge Sanitary Landfill to 405,000 tons per year of municipal solid waste (MSW) from the current 300,000 tons per year of MSW.

"The Southbridge landfill is a key component to our long-term strategy to fully vertically integrate our Massachusetts assets and improve the returns on our investments in that market," said John Casella, chairman and CEO of Casella Waste.

Casella said the increase in the annual permit limit should generate an additional $4 million in earnings before interest, taxes, depreciation and amortization (EBITDA).