Rio de Janeiro | Rio Grande do Sul | Rio Grande | Rio de Janeiro (state) | Rio Grande do Norte | Río de la Plata | Rio | Rio Tinto Group | Rio Negro | Natal, Rio Grande do Norte | Rio Tinto | Rio Negro (Amazon) | Rio Grande Valley | Pinar del Río | Río Piedras, Puerto Rico | Rio Branco | Pinar del Río Province | Das Kapital | Das Boot | Rio Ferdinand | Universidade Federal do Rio Grande do Sul | Río Negro | Del Rio, Texas | Rio Tinto Alcan | Río Piedras | Río Negro Province | Río Cuarto, Córdoba | Resende, Rio de Janeiro | Río Cuarto | Mogi das Cruzes |
Although most of the sources that make this important tributary of the Rio das Velhas are still clean, almost all sewage from Contagem and from Belo Horizonte is being dumped into Arrudas, which also jeopardizes Rio das Velhas Basin and Rio São Francisco Basin.