The projects involve total investments of over US$26mn and will be carried out under the 'obras por impuestos' tax swap system.
The new facility required an investment of US$30mn and is expected to benefit 1.8mn residents of the coastal city.
The pipeline project has sparked controversy with farmers over who owns the water.
The measure that would open up the sector to more private investment has generated huge controversy.
Through the app, clients of what is Brazil's largest water utility will be able to access their current water bill, check bills of the last 12 months, and report water leaks and sewer pipeline ruptures, among other things.