Brazil's national sanitation plan calls for state and municipal governments and water utilities to invest 267bn reais (US$156bn) in waterworks over the next 20 years.
The planned spending averages some 13bn reais annually, which is significantly higher than the current average of 7.8bn reais, government news service Agência Brasil reported.
Increasing investments are needed to reduce water losses, improve management and properly maintain equipment, according to the coordinator of the cities ministry's national sanitation information center, Ernani Ciríaco de Miranda.
Programs such as the national growth acceleration plan (PAC) have helped increase Brazilian spending on sanitation, with the first phase of PAC contracting some 35bn reais in work from 2007-2010.
Despite the improvement, current spending on the sector is still insufficient to reach universal service coverage, de Miranda said.