Tortuga Dos Wastewater Treatment Plant, Plan de Guadalupe, Sinaloa

Tortuga Dos is a municipal wastewater treatment plant located in Plan de Guadalupe, within the municipality of Ahome, Sinaloa, Mexico. The plant serves a small population of 456 residents, reflecting its role in a rural or peri-urban community. Its proximity to the coast (within 10 km) places it in a sensitive coastal zone where treated effluent management is critical for marine water quality. The plant provides secondary treatment, which is the standard biological treatment level required under Mexican regulations (NOM-001-SEMARNAT-1996) for municipal wastewater. With a designed capacity of 86.40 m³/day and an actual discharge volume of 43.20 m³/day, the facility operates at about 50% capacity, indicating room for future growth. As a small-scale plant, it is subject to less stringent monitoring compared to larger facilities, but still must comply with discharge limits for biochemical oxygen demand (BOD) and total suspended solids (TSS). The treated effluent from Tortuga Dos likely drains into local watercourses that flow into the Pacific Ocean near the Gulf of California. This region supports diverse marine life, including fisheries and migratory species. Proper treatment helps protect coastal ecosystems from nutrient pollution and pathogens, which is especially important given the area's ecological and economic reliance on healthy coastal waters.

The plant discharges into the Pacific coastal watershed near the Gulf of California, a biologically rich sea that supports commercial fisheries and migratory marine species. The region's arid climate and seasonal rainfall mean that treated effluent can be a significant water source for local streams and wetlands. Protecting downstream water quality is essential to prevent eutrophication and maintain habitat for native aquatic life.