West Lafayette is adding an aeration tank for the first time in about 30-years.
City leaders hope construction of the fifth tank at the wastewater treatment plant begins this spring.
Utility Director Dave Henderson says it will come at minimal cost to tax payers, but believes the impact is significant.
He says if the city gets further into the 90th-percentile for capacity, the Indiana Department of Environmental Management can implement a sewer ban.
Henderson says a fifth tank will increase capacity as much as 17-percent.