The Williamsport Municipal Water and Sanitary Authority boards on Wednesday heard updates on the Central Wastewater Treatment Plant upgrade along Interstate 180.
Authority customers are supporting the bulk of the costs associated with the $100 million project, which is about at a halfway point.
Customers saw a 25-percent increase in January in their sewer bills and a 3-percent increase in water bills, according to Douglas Keith, authority executive director.
The project is the "major portion of the more than $120 million in projects the sanitary authority has under way to meet federal Environmental Protection Agency and state Department of Environmental Protection Agency requirements for Chesapeake Bay and wet weather compliance standards," according to Walter A. Nicholson, director of operations for the sanitary authority.
Progress of the compliance-related projects is on scheduled for completion late next year, with some additional upgrades scheduled for 2014, he added.
Asked about a more specific timeline for completion, an engineer with Malcolm Pirnie said the Central plant's headworks should be operational in August.
The headworks are the first preliminary treatment of wastewater, he said.
The headworks collect materials in the water and there is a screening process that catches sediment such as sand and grit, the engineer said.