El Cid I Wastewater Treatment Plant, Mazatlán, Sinaloa, Mexico

El Cid I is a wastewater treatment plant located in the Benito Juárez area of Mazatlán, Sinaloa, Mexico. It serves a population of approximately 18,255 residents, placing it in the small to medium agglomeration category for Mexican wastewater infrastructure. As a plant in Mexico, El Cid I is subject to the national water quality standards (NOM-001-SEMARNAT-2021) which set discharge limits for pollutants. The plant's treated effluent likely discharges into local drainage systems that flow toward the Pacific Ocean, given its proximity to the coast. The receiving waters support marine ecosystems along the Sinaloa coast, an area important for fisheries and tourism. Proper treatment helps protect these coastal environments from nutrient pollution and pathogens.

El Cid I is situated in Mazatlán, a coastal city on the Pacific Ocean in Sinaloa. The plant's discharge ultimately reaches the Pacific, either through local arroyos or the municipal drainage network. The coastal waters off Mazatlán support diverse marine life, including important fish stocks and migratory species. Effective wastewater treatment is crucial to prevent eutrophication and maintain water quality for both ecological health and human use.