Playa Santa WWTP - Secondary Treatment Plant in Guánica, Puerto Rico

Playa Santa WWTP is a municipal wastewater treatment facility located in Guánica, Puerto Rico, serving a small population of 527 residents. The plant operates under the regulatory framework of the United States Clean Water Act, administered by the Puerto Rico Environmental Quality Board (EQB). As a secondary treatment facility, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant has a designed capacity of 1,514.16 m³/day and currently discharges 189.27 m³/day of treated effluent. Secondary treatment typically involves activated sludge or trickling filter systems. For small communities like this, the US EPA encourages cost-effective technologies that meet secondary treatment standards. The treated effluent is discharged into local waters near the southern coast of Puerto Rico, which ultimately drains into the Caribbean Sea. The surrounding area includes coastal ecosystems such as mangroves and seagrass beds that are sensitive to nutrient loading. Proper treatment helps protect these habitats and supports recreational uses of nearby beaches.

The plant discharges into the southern coastal watershed of Puerto Rico, with the treated effluent eventually reaching the Caribbean Sea. This region supports diverse marine life, including coral reefs and seagrass beds, which are sensitive to nutrient pollution. The coastal proximity means that even small discharges can affect local water quality and nearshore ecosystems.