Lajas WWTP - Municipal Wastewater Treatment in Lajas, Puerto Rico

Lajas WWTP is a municipal wastewater treatment facility located in Lajas, Puerto Rico, a town on the southwestern coast of the island. The plant serves a population of about 6,475 residents, making it a small-scale facility within the U.S. territory's wastewater infrastructure. Its designed capacity is 1.00 million gallons per day, indicating its role in managing local domestic wastewater. As a facility in a U.S. territory, Lajas WWTP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permit requirements administered by the U.S. Environmental Protection Agency (EPA) or the Puerto Rico Environmental Quality Board. For small communities, secondary treatment is typically required to meet water quality standards before discharge. The plant's treated effluent is discharged into local water bodies that eventually flow into the Caribbean Sea. The surrounding region includes coastal ecosystems such as mangroves and coral reefs, which are sensitive to nutrient pollution. Proper treatment is essential to protect these marine habitats and support the ecological health of the southwestern Puerto Rico coastline.

Lajas WWTP discharges into local streams that drain into the Caribbean Sea near the Guánica Bay watershed. This coastal area supports diverse marine life, including coral reefs and seagrass beds, which are vulnerable to nutrient enrichment and contaminants. The plant's location within 50 km of the coast underscores the importance of effective treatment to minimize impacts on downstream marine ecosystems.