Doce de Octubre Wastewater Treatment Plant, Sinaloa, Mexico

Doce de Octubre is a wastewater treatment plant located in the town of Doce de Octubre, within the municipality of Angostura, Sinaloa, Mexico. The plant serves a small population of 183 residents, reflecting its role in a rural or small community setting. It operates under Mexico's national water regulations, which set discharge standards for municipal wastewater. The plant provides secondary treatment, a standard level that removes organic matter and suspended solids. Its designed capacity is 34.56 m³/day, with an actual discharge volume of 17.28 m³/day, indicating it operates below capacity. As a small facility, it is subject to Mexican official standards (NOM-001-SEMARNAT-1996) that govern wastewater discharge into national waters. The plant's proximity to the coast (within 10 km) means its treated effluent likely reaches the Pacific Ocean via local drainage or the Gulf of California. This coastal discharge requires careful management to protect marine ecosystems, including sensitive habitats like mangroves and estuaries that support diverse aquatic life.

The plant discharges into the Pacific coastal zone of Sinaloa, likely through local arroyos or drainage channels that flow into the Gulf of California. This region supports important fisheries and migratory bird populations. The treated effluent must meet standards to prevent nutrient enrichment and protect coastal water quality, which is vital for the local economy and biodiversity.