San Isidro Wastewater Treatment Plant, Higuera de Zaragoza, Sinaloa

San Isidro is a wastewater treatment plant located in the community of San Isidro, within the municipality of Ahome, Sinaloa, Mexico. It serves a population of 2,282 residents in the Higuera de Zaragoza area. The plant is part of Mexico's national wastewater infrastructure, which is regulated under the Ley de Aguas Nacionales and NOM-001-SEMARNAT standards for discharge quality. The plant operates with secondary treatment and has a designed capacity of 216.00 volume units, with a similar discharge volume. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. For small agglomerations like this, secondary treatment is standard under Mexican regulations, which require treatment before discharge into water bodies. The plant's discharge ultimately flows into the Pacific Ocean via local drainage systems. The region of Sinaloa is characterized by agricultural activity and coastal ecosystems. The treated effluent supports the protection of downstream water quality, which is important for both human use and aquatic life in the area.

The plant discharges into local waterways that drain into the Pacific Ocean near the Gulf of California. This coastal region supports diverse marine life, including fish and crustaceans important for local fisheries. The secondary treatment helps reduce nutrient and organic loads, mitigating eutrophication risks in downstream coastal waters.