The government is working on projects to build highways and install water services in a remote part of the central Amazon jungle, while promoting port and airport projects in the area.
The Mendoza province expects the project to help irrigate 40,000 hectares and benefit thousands of agricultural producers.
The US$800mn desalination project will supply the water needs for the future expansion of Spence.
State water utility Sabesp has call bids for a US$52mn waterworks project.
A document containing 25 proposals was presented last year to President Michelle Bachelet to speed up the environmental evaluation process.
The US$219mn project, one of the initiatives in the Panama Bay sanitation program, entails the construction of a second module at the existing Juan Díaz wastewater treatment plant, located in the capital city.
Foreign direct investment for the two sectors reached nearly US$5bn in the first four months of the year.
Environment minister Rafael Pacchiano said water policies must be formulated based on the available scientific research to better address challenges that are related to climate change.
A report says more than 20% of the potable water consumed by homes has traces of fecal matter.
Cash-strapped municipal water companies will get a US$130mn shot in the arm from the central government as the country struggles to recover from widespread flood damage.