Neighborhoods in the Grajaú district, such as Jardim Edda, were built on the edges of the Billings and Guaraparinga reservoirs, with sewage running straight through. Photo – Antonio Souza

Neighborhoods in the Grajaú district, such as Jardim Edda, were built on the edges of the Billings and Guaraparinga reservoirs, with sewage running straight through. Photo – Antonio Souza