Improving aquatic ecological assessments

Learned Discourses—Integr Environ Assess Manag 6, 2010 ß 2009 SETAC

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Table 1. The most abundant illicit drugs in waste and surface water and their removal in sewage treatment plants (STPs). LOQ ¼ Limit of Quantification. SD ¼ standard deviation. Concentrations (ng/L) and removal rates (%) in wastewater

Concentrations (ng/L) in surface water

Milan STP (serving 1.25 million people) Mean of 5 weeks monitoring W SD

Lugano STP (serving 120,000 people) Mean of 3 weeks monitoring W SD

River water Mean of Po, Lambro, Olona and Arno rivers

Lake water (Lake Lugano)

465
90 (100%)

218
58 (94%)

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