ETE Graminha Wastewater Treatment Plant, Limeira, São Paulo, Brazil

ETE Graminha is a municipal wastewater treatment plant located in the Portal de São Clemente area of Limeira, in the state of São Paulo, Brazil. The plant serves a population of about 8,809 residents, placing it in the small agglomeration category for Brazilian wastewater infrastructure. As a plant in Brazil, ETE Graminha is subject to the National Environmental Council (CONAMA) resolutions and state-level environmental regulations, which set standards for effluent quality and treatment. The plant's treated effluent is discharged into local waterways that drain into the Piracicaba River basin, part of the larger Paraná River system. This region supports diverse aquatic life and is important for downstream water supply and irrigation. The plant plays a key role in protecting water quality in the Piracicaba River watershed.

The plant discharges into local streams that flow into the Piracicaba River, a major tributary of the Tietê River, which ultimately reaches the Paraná River basin and the Río de la Plata estuary. The Piracicaba River supports diverse aquatic ecosystems and is used for drinking water supply and agriculture. Protecting this watershed from untreated sewage is critical for maintaining water quality and ecological health in the region.