Category Archives: Lake Stewards of Maine

Introducing Lake Stewards of Maine

We have a NEW name and logo, Lake Stewards of Maine (LSM)! The change more accurately reflects the commitment, diversity and breadth of the great work being done by more than 1,300 LSM volunteers throughout Maine. And, it’s much easier to say and remember! Our Lake Stewards are engaged in numerous initiatives throughout the State […]


Support LSM Lake Stewards who are monitoring the health of hundreds of lakes throughout Maine. The direct involvement of dedicated LSM citizen lake scientists plays a vital role in maintaining and improving the water quality of Maine lakes and is a major contributing factor when newly established populations of aquatic invasive species are quickly detected, […]

Annual Lake Monitoring Conference Archives

2018 Lake Monitoring Conference Speakers/Presenters: Forensic Biological, Geological, and Chemical Studies Exploring the Age and Origin of Very Unusual Lake Sediment in Lake Auburn – Implications for the Phosphorus Budget Steve Norton (UMaine) – Maine’s preeminent Geochemist will share the findings of recent research regarding the unanticipated severe algal bloom that occurred in Lake Auburn […]

Annual Conference Map & Directions

Directions to The Great Outdoors, in Turner, Maine: From the North & West: Head South on Route 4 In North Turner, turn left onto route 219 Go two miles, turn right onto route 117 In approx .25 miles turn Right onto Naiad Lane, Great Outdoors sign will be at the end of the road, facility […]

Instructions for Measuring Transparency

Secchi Disk Transparency is a quick, simple and accurate method for determining lake water quality. Transparency is a measurement of how deep into a lake the sunlight can penetrate. Factors that interfere with light penetration are algae, zooplankton, water color, and silt. Since algae is usually the most abundant item, by measuring transparency one also […]

Monofilament Line & Wildlife Survey


The Great Outdoors Venue Information

The Great Outdoors Recreational Function Facility, LLC is located on the northerly end of Pleasant Pond on Route 117 in Turner, Maine.  Main lodge address is 52 Naiad Lane, Turner, Maine.   207-224-7061 Directions to The Great Outdoors: From the North & West: Head South on Route 4 In North Turner, turn left onto route 219 […]


Curious about that “blob” you see in the water?  Meet the bryozoans!   Bryozoans are tiny colonial invertebrate animals belonging to the phylum ‘bryozoa’, and are also known as “moss animals”.  There are 20 freshwater species worldwide.  A bryozoan colony, consisting of individuals called zooids, may resemble a brain-like gelatinous mass and be as big […]


Crayfish Monitoring Maine is now home to several non-native crayfish species. Of those species known to be from ‘away’, two are considered by state experts to pose the greatest threat to native ecosystems: rusty crayfish (Orconectes rusticus) and red swamp crayfish (Procambarus clarkii). Working in concert with a team of researchers, the LSM is looking […]

Suspicious Plant Form


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.