A £1.5 million project has cleaned up the waste water treatment works not far from the city's new Commonwealth Games facilities in Dalmarnock.
Another £1m was spent on maintenance work.
Today Scottish Water said it was money well spent because it's improved operations at the treatment works and also reduced the risk of what they describe as "odour issues".
The upgrade, one of the biggest tackled at any waste water treatment works (wwtw) in Scotland, will also help protect and improve the River Clyde's natural environment.
Manager Gary Caig, said: "Scottish Water recognises that tackling odour issues at the wwtw has been important for local residents and businesses near the facility and for the development of the area and this investment has substantially reduced the risk of such issues emerging."
The upgrade has been completed more than a year before thousands of athletes and officials jet into Glasgow from around the world for the 2014 Commonwealth Games.
They will stay in the new Athletes' Village being built on the banks of the Clyde in Dalmarnock.
Mr Caig added: "We are also committed to supporting the regeneration of the Glasgow area and to improving our infrastructure in the city.
"This investment will benefit our customers in the area for many years to come. It will also help the city as it prepares for the Glasgow 2014 Commonwealth Games and other major events."
Scottish Water has admitted splashing out £1.5m to provide, "a more robust odour management system," which included refurbishing a sludge pumping station odour control unit as well as spending £1m on other works such as the modification of storm tanks, overhauling storm retention pumps and upgrading mechanical and electrical equipment.
The improvements have been backed by East End councillor George Redmond.
He said: "It is great news that Scottish Water has completed these significant improvements to their infrastructure at Dalmarnock wwtw and tackled the odour issues there.
"I am sure that all those affected, and especially local residents, will welcome the investment."