In the summer, the biggest source of water pollution is swimming, which is a municipal responsibility, whereas in the fall and spring, it's caused primarily by the agricultural sector.
Phosphorus is the greatest river killer. We touched on that earlier. The phosphorus and nitrogen found in all Quebec rivers come largely from agricultural activities, and there are still no clear strategies to remedy the situation. Besides that, 30% of phosphorus also comes from the Great Lakes.
We have quite a challenge ahead of us to ensure that the regulations are properly enforced at the watershed level.