Identification and assessment of ecotoxicological hazards attributable to pollutants in urban wet weather discharges.

摘要: Urbanization has led to considerable pressure on urban/suburban aquatic ecosystems. Urban Wet Weather Discharges (UWWD) during rainfall events are a major source of pollutants leached onto and into urban surfaces sewers, which in turn affect We assessed the ecotoxicity different compounds identified UWWD hazard represented by each them. To this end, quotient (HQ) values were calculated for compound detected based their predicted no effect concentration (PNEC) maximum measured effluent concentrations (MECmax) found dissolved part UWWD. For 207 UWWD, sufficient data existed 165 them calculate PNEC. The these varied greatly. Pesticides high proportion wide variety hazardous whose HQ (94 values), they among most (HQ > 1000) transported stormwater. combined sewer overflows (CSO) was linked mainly heavy metals pharmaceutical compounds. Consequently, monitoring should be priority future. level certain could have been underestimated due adsorption particles, leading low phase Hence, an in-depth study will required clarify effects organisms.