Allen Mounts, Director of the Evansville Water and Sewer Utility (EWSU) says $540 million is the price tag on the final plan that will be sent to the Environmental Protection Agency (EPA) at the end of the month.
The plan would be implemented over 28 years.
Through that time sewer rates would increase from the average $26 per month to almost $90.
The city submitted a first draft to the EPA last summer. Since then, Mounts says the EWSU had some more time to do extra research and analysis.
He says the original data estimated 3.5 billion gallons of sewage went into the Ohio River and Pigeon Creek each year.
Mounts says that data was collected in 2011, Evansville wettest year on record, and was subsequently skewed.
He says new data found 2 billion gallons of raw sewage ends up in the Ohio and Pigeon Creek every year.
The final plan will be submitted to the EPA by the end of May.
Mounts says the city should hear back from the agency with in three months, but he expects the EPA might not approved it.
"We probably expect the EPA to come back and say, 'That's not enough, we want you to do more.' So we'll have quite a heated debate with them over that and try to hold our ground on this is the right solution for Evansville," says Mounts.
The city will hold a total of 6 informational meetings for the public this week. Here is a full list:
9 am-10:30 am at McCollough Library, 5115 Washington Ave.
6:30 pm- 8 pm at Bosse High School, 1300 Washington Ave.
9:30 am-11 am at North Park Library, 960 Koehler Dr.
6:30 pm-8 pm at Vogel Elementary, 1500 Oak Hill Rd.
9:30 am-11 am at Red Bank Library 120 S. Red Bank Rd.
6:30 pm to 8 pm at Fairlawn Elementary 2021 S. Alvord Blvd.