Lake Housatonic has had an invasive weed problem for quite some time. For many years the LHA tried to address the issue with a weed harvester that cut the weeds and actively removed them from the lake. This proved to be more harmful than helpful as the cutting of the weeds actually caused more growth. In 2018 the LHA decided to partner with Solitude Lake Management and try a chemical treatment program to see if it would produce better results. The LHA ended up treating for Eurasion Watermilfoil which was the dominant invasive species and it proved very sucesful. Over the last few years, the LHA tuned and expanded the program which continued to yield good success, far exceeding what wwas achieved via the mechanical weed harvester.