It could cost upwards of $4 million to get sewer service to a portion of Gwynn’s Island—a move that would be a tough pill for taxpayers to swallow, but would alleviate some concern of septic problems on the island.

Thomas Jenkins, Mathews County’s director of planning and zoning, delivered the news to the Mathews Board of Supervisors during its meeting Tuesday afternoon in the historic courthouse.

Jenkins said he had been in contact with officials at the Hampton Roads Sanitation District, which currently serves the sewer needs of a portion of Mathews and Gloucester, after the board tasked him last month with finding out the cost of running a sewage line to the island in order to help alleviate sewage problems related to the Hole in the Wall restaurant property and other parts of the island.

According to Jenkins, HRSD officials told him it would cost about $200 per linear foot to run a force main from to southwest corner of the island to the intersection of Cricket ...