Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 8247
Title: Sewage contamination in a subtropical coastal area (São Sebastião Channel, SP, Brazil)
Author: Pablo Muniz, Denis A.M. da Silva, Sandra Bromberg, A. S. Pires-Vanin
Publication Year: 2015
Journal: Marine Pollution Bulletin
Volume: 99
Issue: 1-2
Pages: 292-300

Urban effluent discharges in Brazilian coastal areas are a chronic problem and often lead to changes in the marine environment. São Sebastião Channel, SP, Brazil, is an important aquatic ecosystem to be monitored for urban sewage contamination due to the intense urban activities in that region as well as the relative high biodiversity of marine organisms. Total organic carbon (TOC), total nitrogen (TN), total sulphur (TS), steroids and linear alkylbenzenes (LABs) were measured in several sediment samples collected in three strategic locations of the São Sebastião Channel in order to monitor urban sewage contamination. Concentrations of TOC and TN ranged between 1.42 - 24.23 mg g-1 and 0.09 mg g-1 - 2.19 mg g-1, respectively. TS values ranged between 0.15 - 4.68 mg g-1.  Summed LAB and summed steroid levels ranged from below detection limit (< DL) - 51.3 ng g-1 and 0.01 - 11.26 ug g-1, respectively. Sediment samples collected near sewage outfalls in the central part of the São Sebastião Channel had higher concentrations of urban sewage-associated contaminants compared to sediments collected from other regions of this area.

Theme: Habitats to Support Sustainable Fisheries and Recovered Populations
Foci: Assess the impacts of toxic chemicals and other pollutants across biological scales, and identify pollution reduction strategies that improve habitat quality.