ETE KM 30 Wastewater Treatment Plant, Simões Filho, Bahia, Brazil

ETE KM 30 is a wastewater treatment plant located in Simões Filho, a city in the state of Bahia, Brazil, within the Metropolitan Region of Salvador. The plant serves a population of about 94,636, placing it in the medium-to-large agglomeration category under Brazilian regulatory frameworks. Its location in the coastal northeast region subjects it to specific environmental considerations related to tropical climate and urban runoff. Brazil's wastewater treatment standards are governed by CONAMA resolutions and state-level environmental agencies. For plants of this scale, secondary treatment is typically required, with nutrient removal increasingly expected in sensitive coastal zones. The plant's designed capacity is 1.00 (likely in cubic meters per second or similar unit), indicating a significant infrastructure footprint. The plant's size suggests it plays a key role in regional sanitation. The plant's discharge likely reaches the Bay of All Saints (Baía de Todos os Santos), one of Brazil's largest and most ecologically important bays. This estuary supports mangroves, fish nurseries, and artisanal fisheries. The bay's health is critical for local biodiversity and the livelihoods of coastal communities. Proper treatment at ETE KM 30 helps reduce nutrient loading and pathogen inputs into this sensitive marine environment.

ETE KM 30 is situated in the coastal zone of Bahia, within the drainage basin that flows into the Bay of All Saints. This bay is a large tropical estuary that supports extensive mangrove forests, seagrass beds, and coral reefs. It is a vital habitat for marine species including sea turtles, manatees, and numerous fish species. The plant's discharge, if properly treated, helps mitigate eutrophication risks and protects the bay's ecological integrity, which is also important for local tourism and fishing industries.