The government devised the policy in collaboration with the United Nations Development Programme.
The facility, being financed by the IDB, will reduce the volume of effluent entering the Paraguay river and benefit 1mn people, ministry says.
The local consortium submitted the best offer for a contract to complete Brazil's multibillion-dollar São Francisco river water transfer initiative.
The Brazilian water utility has called three tenders to improve water supply and sewerage systems in the metropolitan region of São Paulo city.
The San Alfonso bridge in the Cajón de Maipo valley close to capital Santiago collapsed due to recent flooding caused by heavy rains.
The regional lender, along with Fundación Coca-Cola, Fundación FEMSA and non-profit One Drop, will spend US$25mn in five countries, BNamericas is told.
The Argentina province will provide tax breaks for farmers affected by flooding since the beginning of the year.