Water is everywhere around Montréal. For years, it has formed the geography of our city, and is the foundation of our society. The Island of Montréal is the largest of an archipelago of 325 islands, and its shores cover nearly 270 kilometres (Source: Ville de Montréal). This water network plays a key role in supporting biodiversity. Moreover, wetlands make up an area of nearly 210 square kilometres of the territory of the Communauté métropolitaine de Montréal (Ducks Unlimited, 2010) and are home to a rich and diverse flora and fauna. Water is essential in order for nature and urban society to flourish, but various industrial, residential and agricultural contaminants, as well as overexploitation, threaten this resource. Fortunately, there are many projects that highlight the water that surrounds the region and the healthy ways we can manage it so that it benefits biodiversity. It’s up to you to discover them through Biopolis!