BROOKLYN - Mayor Michael Bloomberg unveiled a $20 billion project today at the Gowanus Canal pumping station aimed at improving water quality throughout the city.

The plan includes an upgrade to a waste water pump station to reduce sewer overflows into the Gowanus Canal. There will also be an upgrade to the tunnel that feeds clean water into the canal.

Mayor Bloomberg says the water quality project will deliver 1 billion gallons of clean drinking water to city residents.

It is expected to be completed by the end of the year.