Pollution of water sources with Bromacil in Alajuela province was ignored by several government entities, all of which must now take responsibility.
The Canadian investment company offered over US$50mn for Galvão's 19.7% stake in the Brazilian water company.
Lower chamber lawmakers therefore consider it an obligation of power distributors to maintain electricity supplies to water plants 100% of the time using back-up supplies in case of failure.
The local government plans to install 100,000 rainwater collection systems to improve access to potable water.
Following damaging floods last week, Chaco detailed projects over US$40mn for which the governor is seeking federal funding.