ETE ARTEMIS Wastewater Treatment Plant, Piracicaba, São Paulo, Brazil

ETE ARTEMIS is a wastewater treatment plant located in the Artemis district of Piracicaba, in the state of São Paulo, Brazil. The plant serves a population of approximately 5,000 people, making it a small-scale facility within the region's sanitation infrastructure. Piracicaba is part of the Campinas intermediate geographic region, an area with significant agricultural and industrial activity. As a small agglomeration in Brazil, the plant is subject to national regulations under the National Environmental Council (CONAMA) and the National Water Agency (ANA). Brazilian law requires adequate treatment for all wastewater discharges, with standards varying by receiving water body classification. For plants of this scale, secondary treatment is typically expected to protect water quality. The treated effluent is discharged into local watercourses that ultimately drain into the Piracicaba River, a major tributary of the Tietê River basin. The Tietê River flows through São Paulo state and eventually reaches the Paraná River basin, which empties into the Río de la Plata estuary. The Piracicaba River supports diverse aquatic life and is used for water supply, recreation, and agriculture downstream.

The plant's discharge enters local streams that feed into the Piracicaba River, part of the Tietê River basin. The Piracicaba River is an important water source for the region, supporting ecosystems and human activities. Downstream, the Tietê River flows through São Paulo state, eventually joining the Paraná River system, which drains into the Río de la Plata estuary. The watershed is ecologically sensitive due to agricultural runoff and urban pressures, making proper wastewater treatment critical for maintaining water quality and aquatic biodiversity.