Billings Reservoir
The Billings Reservoir is the largest reservoir in São Paulo, Brazil, covering a total of. It is named after Asa White Kenney Billings, the American hydroelectric engineer who was instrumental in building it. The Portuguese word represa also means "dam".
The reservoir supplies about 1.8 million people, and also is used for fishing and swimming. In recent years, there have been problems with wastewater and garbage such as plastic bottles, as well as problems associated with unapproved human settlement in the surrounding regions.