Carthage, IL – Carthage residents will be paying more on their water and sewer bills. The council approved a hike designed to cover what the city pays the firm contracted to run the water and sewer plants. City Clerk Kathy Graham says the increase will add about a dollar a month to those paying the minimum bill. The increase will be proportionately larger on commercial billings. The increase is scheduled to take effect next month. The city was not charged a rate increase by the firm last year.