Category Archives: Page is Link Only

Invasive Plant Patrol Monitors

Link to Training & Certification

Invasive Aquatic Species

Link to IAS Background

Interactive Field Guide

Please click here for the Virtual Herbarium.

Aquatic Invader Resources

Link to IAS Resources page

Other Monitoring Opportunities

Link to Other Lake Phenomena  

Water Quality Monitors

Link to Training & Certification

Our Mission

The Mission of the Lake Stewards of Maine (LSM) is to help protect Maine lakes 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.


LSM is a non-profit 501(c)(3) organization committed to the collection of information pertaining to lake water quality. For 40 years, trained volunteers throughout Maine have donated their time so that we may all learn more about one of Maine’s most beautiful and important resources — our lakes.