ETE Lutécia Wastewater Treatment Plant, Lutécia, São Paulo, Brazil

ETE Lutécia is a municipal wastewater treatment plant located in Lutécia, a small town in the state of São Paulo, Brazil. The plant serves a population of approximately 2,206 residents, making it a small-scale facility within the region's sanitation infrastructure. The plant provides secondary treatment, which is the standard biological process required for most urban wastewater in Brazil. Under Brazil's national environmental regulations (CONAMA resolutions and state-level permits), secondary treatment is typically mandated for communities of this size to reduce organic load and suspended solids before discharge. The treated effluent from ETE Lutécia is discharged into local water bodies that drain into the Paranapanema River basin, a major tributary of the Paraná River. This river system supports diverse aquatic life and provides water for downstream communities and agriculture in southeastern Brazil.

The plant discharges into small streams that flow into the Paranapanema River, part of the larger Paraná River basin. This watershed supports diverse freshwater ecosystems and is important for regional water supply. The secondary treatment helps protect downstream water quality by reducing organic pollution and nutrient loads.