The first general meeting to discuss rampant weed infestation in Lake Mishnock was held at the Lake Mishnock Volunteer Fire Department on August 12, 2004. The meeting offered an opportunity for 70+ area residents to voice their concerns. In response to that meeting and several others, The Lake Mishnock Preservation Association, Inc. (LMPA) was formally established in March 2005. 

Invasive weeds, which already choke Little Mishnock, are spreading over the entire lake. These invasives have created a crisis, and action is needed.  In order to learn more about combating invasive weeds and to obtain professional advice, LMPA consulted with the nearby Tiogue Lake Association, which had similar problems, and with two lake-treatment businesses. As a result of these consultations, LMPA authorized Aquatic Control Technology to seek the required permits from the Department of Environmental Management. Another general meeting was held April 19, 2005, at the Mishnock Barn (200 Mishnock Road, West Greenwich) and provided the public with detailed information on the lake's condition, and the proposed treatment. Permits were approved and treatment applied in June.

The results have been excellent. Many residents on the lake have commented on the reduction of weeds. One said, "I haven't been able to swim from my dock in five years, but I can now!"