AWWA WQTC69461

This powerpoint presentation begins by providing a brief overview of emerging contaminants such as pharmaceuticals and personal care products, and household, industrial and agricultural chemicals. Study objectives include the following: monitor the occurrence of emerging contaminants in raw and treated wastewater, source water and treated drinking water; identify the main sources of contaminants in 4 systems, including Mille-Iles / des Prairies River / Assumption / St. Lawrence; estimate the removals by WW and DW treatment plants in the greater Montreal area; and, identify the best surrogates for groups of trace contaminants. Topics covered include: location of sampling sites around Montreal; characteristics of wastewater treatment plants and drinking water facilities; analytical methods; and, results WW, source and treated DWs. Presentation conclusions indicate the following: intake of drinking water facility (DWF3) constitutes simultaneously the entry point of the Mille-Iles and Des Prairies rivers; pesticides/herbicides more often detected compounds than the pharmaceutical products; at intake of DWF4, pharmaceuticals are more abundant due to the pharmaceutical residues coming from municipal sewage treatment plants discharges upstream, and the pesticide compounds that come from the Ottawa River. Includes tables, figures.