While the construction of a sewerage system in Bocas del Toro province is already 40% complete, an expansion of a potable water plant in Darién province is progressing according to plan.
The frontrunner has declared his intention to go ahead with unfinished projects.
Alberto Carrasquilla, who also served as finance minister during the Álvaro Uribe administration, is accused of profiting from a water bonds program.
The public works ministry will modify the framework for the initiatives, which will include partial funding of studies by the state and higher premiums for those who propose them.
The project is crucial to guarantee water supply in Brazil's drought-stricken northeast region.
Consorcio Aguas de David, the group responsible for the project in Panama's Chiriquí province, was given a two-week deadline to get back to work.
João Doria plans to use the resources from an additional shares sale to expand Sabesp's services.