Medellín's multi-utility plans to connect 650 houses a year to potable water systems and 900 to sewerage networks.
The state also received permission from Conagua to extract 733Mm3 from the Yaqui and Mayo rivers.
Facing budgetary constraints, Chile is evaluating the potential to employ PPPs for water projects with energy generation components.
Samarco, as well as the state government and the city's water utility Sanear, need to resolve the issue as soon as possible, prosecutors say.
The authorities are also planning to build 22 water treatment plants and rehabilitate seven plants to supply drinking water to 100% of city residents.
In Falcón works are underway to install a water transfer system to interconnect three reservoirs in order to bring water to northern parts of the state and as far as the Paraguaná peninsula, while measures are also being taken to restore the flow level at Falcón's largest reservoir.
The largest civil works tender is for expanding the integrated water supply system in the coastal town of Barra do Pojuca.