BUTLER TOWNSHIP — Butler Area Sewer Authority customers will have a monthly increase of $1 to their bills starting July 1, with another projected increase next year as the authority looks to pay for a $10 million bond issue that will update sewage treatment infrastructure.

BASA board members today approved the $1 monthly increase.

The rate increase will bring the monthly bills of residential customers to $33, according to a budget narrative provided by BASA executive director Tom Rockovich

Industrial and commercial rates also will be increased, Rockovich said.

Because of the authority’s billing schedule, customers won’t see the rate hike on their bills until Oct. 1.

The rate hike will raise about $556,000 for the authority’s 2015-16 proposed $9.84 million budget, Rockovich said.