[2] The river supplies water to 9 million people in Greater Rio de Janeiro.

[3] Many tributaries of the river rise in the 4,398 hectares (10,870 acres) Mendanha State Park, created in 2013.

[4] An aqueduct carries the water across the Pedra Branca State Park to Rio's south zone.

[3] The pollution problem is so serious that it threatens the water supply of the Rio de Janeiro metropolitan area.

This article related to a river in Rio de Janeiro state, Brazil is a stub.