Greenwood Lake Commission website. The Greenwood Lake Commission is a bi-state commission that was formed in 2001 for the express purpose of improving the water quality of this beautiful lake. Their Mission is to serve as a bi-state cooperative effort to help ensure that the natural, scenic, and recreational resources of Greenwood Lake and its watershed are protected, so that the pristine beauty of the area will be preserved and maintained for the enjoyment and recreation of present and future generations.