Puerto Escondido Wastewater Treatment Plant, Oaxaca, Mexico

Puerto Escondido wastewater treatment plant is located in the coastal city of Puerto Escondido, in the state of Oaxaca, Mexico. The plant serves a population of 6,389 and operates with secondary treatment, a standard level for municipal wastewater in Mexico. Its designed capacity is 1,296.00 cubic meters per day, with a current discharge volume of 604.80 cubic meters per day. As a secondary treatment facility, the plant uses biological processes to reduce organic matter and suspended solids. This level of treatment is typical for smaller coastal communities in Mexico, where national regulations require adequate treatment before discharge to protect public health and the environment. The plant's location near the coast means it must comply with Mexican environmental standards for coastal discharges. The treated effluent from Puerto Escondido plant is discharged into the Pacific Ocean, as the plant is situated within 10 km of the coast. The receiving waters support diverse marine life, including coral reefs and fish populations important for local fisheries. The plant plays a key role in preventing untreated sewage from reaching the ocean, thereby protecting coastal water quality and the tourism-dependent economy of the region.

The plant discharges into the Pacific Ocean near Puerto Escondido, a coastal area in Oaxaca. The local watershed drains from the Sierra Madre del Sur mountains to the coast, supporting estuaries and mangrove ecosystems. The offshore waters are part of the Eastern Tropical Pacific, a region known for high biodiversity including sea turtles, dolphins, and migratory fish. Proper wastewater treatment is critical to prevent nutrient pollution and protect coral reefs and seagrass beds that sustain local fisheries and tourism.