La Pitahayita Wastewater Treatment Plant, Culiacán, Sinaloa, Mexico

La Pitahayita is a municipal wastewater treatment plant located in Culiacán, Sinaloa, Mexico. It serves a small population of 639 residents, reflecting its role as a local facility within the urban area of Culiacán. The plant is situated inland, more than 10 kilometers from the coast, but within 50 kilometers of the Pacific Ocean. The plant provides secondary treatment, which is a standard biological process that removes organic matter and suspended solids. With a designed capacity of 69.12 megaliters per year and an actual discharge volume of 60.48 megaliters per year, the plant operates below its capacity. In Mexico, wastewater treatment plants are regulated under the National Water Law (Ley de Aguas Nacionales) and standards such as NOM-001-SEMARNAT, which set discharge limits for pollutants. The treated effluent from La Pitahayita likely discharges into a local watercourse that flows toward the Pacific Ocean, contributing to the health of downstream aquatic ecosystems. The plant plays a key role in protecting water quality in the region, particularly given its proximity to the coast and the ecological sensitivity of coastal waters.

La Pitahayita discharges into a local drainage system that ultimately reaches the Pacific Ocean via the Culiacán River basin. The Pacific coast of Sinaloa supports diverse marine life, including important fisheries and migratory species. By providing secondary treatment, the plant helps reduce nutrient and organic pollution that could otherwise contribute to eutrophication and harm coastal ecosystems.