Puerta de Anzar Wastewater Treatment Plant, Puerta de Ánzar, Colima, Mexico

Puerta de Anzar is a wastewater treatment plant located in Puerta de Ánzar, a locality in the municipality of Colima, Colima state, Mexico. The plant serves a small population of 303 residents, reflecting its role in a rural or small community setting within the region. The plant operates with secondary treatment, which is the standard biological treatment level required under Mexican regulations (NOM-001-SEMARNAT-1996) for municipal wastewater. Its designed capacity is 259.20 cubic meters per day, with an actual discharge volume of 43.20 cubic meters per day, indicating operation well below capacity. The treated effluent is discharged into the local environment, likely contributing to the Armería River basin or nearby streams that drain into the Pacific Ocean. The plant's operation helps protect local water quality and downstream ecosystems in the Colima region.

The plant discharges into the Armería River basin, which flows through Colima state and empties into the Pacific Ocean near the town of Armería. This watershed supports diverse aquatic life and is important for local agriculture and fisheries. The secondary treatment reduces organic pollutants and suspended solids, helping to maintain ecological balance in the river and coastal waters.