Pharmaceuticals are important to lead the healthy life in the current world. However, continuous and huge use of these pharmaceuticals led to constant release in the environment and in particular in water sources. And also, low absorption and metabolism of pharmaceuticals in humans and animals led to their continuous entry into the environment via feces and urine. These pharmaceuticals are classified as the main class of contaminants of emerging interest (CEI).
Lake St. Charles is the primary drinking water reservoir of Quebec City, Canada, providing water to about 300,000 people. Over the past decade, several occurrences of blue-green algae (cyanobacteria) bloom have been recorded, affecting the quality of water in this strategic reservoir. Evaluation of observed data collected over the past decade indicates that the water quality of the lake is undergoing fast degradation due to anthropogenic activities around the lake and in the watershed.