Through science-based action, education and advocacy, we work to protect and preserve the values and benefits of Maine’s lakes, ponds, and watersheds for future generations. We've been doing this since our founding in 1970 as the Congress of Lake Associations.

We are Maine's only statewide membership organization devoted solely to lakes and ponds. With our more-than-100 partner lake associations, we form a nucleus of lake conservation activity that strengthens the capacity of lake ecosystems to resist destabilizing threats. Led by a focused and dedicated team, we have recently:

advocated vigorously—and successfully—on behalf of Maine's lakes at the statehouse;

expanded LakeSmart, our first-in-the-nation lake resilience program; and

reached thousands of students through our innovative experiential Lakes Alive! middle and high school program;

adopted a broader and more inclusive membership model; and

embarked on a fundraising campaign to recruit new members, so that our vital work can continue for the next 50 years and beyond.

We believe in the future of Maine's lakes, and will strive to ensure the protection of our cherished lakes for today and for future generations. If you love your lake, then jump in! and join us or donate.

Lake Stewards of Maine (LSM) works to protect Maine lakes and to promote lake stewardship through widespread citizen participation in the gathering and dissemination of credible scientific information pertaining to lake health.

LSM trains, certifies and provides technical support to hundreds of volunteers who monitor a wide range of indicators of water quality, assess watershed health and function, and screen lakes for invasive aquatic plants and animals. In addition to being the primary source of lake data in the State of Maine, LSM volunteers benefit their local lakes by playing key stewardship and leadership roles in their communities.