The Cannon Watershed (HUC 07040002) covers an area of approximately 327 square miles in New Hampshire, USA. The hydrology of the watershed is dominated by the Cannon River, which is a major tributary of the Connecticut River. The area receives an average annual precipitation of 50-70 inches, with snowfall accounting for a significant portion of the total. The watershed is home to several reservoirs, including the Echo Lake Reservoir, which supplies water to the town of Franconia. The surface water in the watershed is of high quality, supporting a diverse range of aquatic life. Interesting climatic facts include the region's high elevation and proximity to the White Mountains, which result in colder temperatures and more snowfall than surrounding areas. In recent years, the watershed has experienced increased fluctuations in precipitation and temperature, which can impact the ecosystem and water supply.