Wilton officials also plan to ask voters to approve a new $4.8 million project to finish upgrades needed for the aging wastewater treatment system, said Clayton Putnam, superintendent for the town Water and Sewer Department.

A public hearing on the project is tentatively scheduled for April 17, which is required before the proposal goes before voters at the annual Town Meeting in June, he said.

If passed, the new project would add to the annual debt payment tied to the initial system upgrades, Putnam said. He estimated the town’s sewer customers would have to pay an added $180 per year for 30 years on their sewer bills.

The Maine Clean Water Revolving Loan Fund has approved a $438,156 loan to help pay for the new project, with a condition that forgives $81,844 of that amount if certain criteria are followed, a town report states.

The federal agriculture department also approved a $2.48 million loan and a grant of almost $2 million to cover the remaining project costs, the report states.