Las Maravillas Wastewater Treatment Plant, Tijuana, Baja California, Mexico

Las Maravillas is a wastewater treatment plant located in Tijuana, Baja California, Mexico. It serves a small population of 3,651 people and operates with secondary treatment, which is standard for communities of this size in Mexico. The plant is situated in the Zona Río district, near the Tijuana River. The plant has a designed capacity of 3,456.00 units and currently discharges 345.60 units of treated wastewater. As a secondary treatment facility, it provides biological treatment to reduce organic matter and suspended solids. In Mexico, wastewater treatment plants are regulated under the National Water Law (Ley de Aguas Nacionales) and must comply with official standards (NOM-001-SEMARNAT) for discharge quality. The treated effluent from Las Maravillas ultimately reaches the Pacific Ocean via the Tijuana River estuary. This coastal region supports diverse marine life and is an important ecological area. The plant's proximity to the coast underscores the need for effective treatment to protect nearshore water quality and marine habitats.

The plant discharges into the Tijuana River watershed, which flows into the Pacific Ocean near the US-Mexico border. This coastal area supports a variety of marine species and is part of a larger estuarine system that provides critical habitat for fish and migratory birds. The region's semi-arid climate means that treated wastewater can be an important water source for the local ecosystem, especially during dry periods.