Patto Wastewater Treatment Plant, Panaji, Goa, India

Patto is a secondary-level wastewater treatment plant located in the Patto Colony area of Panaji, the capital city of Goa, India. The plant serves a population of approximately 3,341 people and has a designed capacity of 500 m³/day, with a current discharge volume of 500 m³/day. It is situated in the coastal state of Goa, within 10 km of the Arabian Sea. As a secondary treatment facility, Patto provides biological treatment to remove organic matter and suspended solids, meeting the standards expected under India's environmental regulations. The plant operates under the oversight of the Goa State Pollution Control Board, which enforces discharge norms for wastewater treatment plants in the region. For a plant of this scale, secondary treatment is appropriate and aligns with the requirements for small agglomerations. The treated effluent from Patto is discharged into the local drainage network, which ultimately flows into the Mandovi River estuary and then into the Arabian Sea. The Mandovi River is a major waterway in Goa, supporting diverse aquatic life and providing water for agriculture and domestic use. The plant plays a crucial role in protecting the estuarine and coastal ecosystem from untreated sewage pollution.

Patto's treated effluent enters the local drainage system, which drains into the Mandovi River estuary near Panaji. The Mandovi River flows into the Arabian Sea, a biologically productive coastal zone supporting fisheries and mangrove ecosystems. The plant's coastal proximity (within 10 km) means that any nutrient or pathogen discharge could affect estuarine and marine water quality, making proper treatment essential for protecting downstream habitats and public health.