Water Quality Resources

Water Quality ResourcesSecchi Disk

Simulator ButtonOnline Secchi Simulator

Annual re-certification is now required on the Secchi Simulator. Your login should be included in your spring packet or contact the LSM office at 783-7733.

Water Quality Workshops

Find a Recertification Workshop near you: Water Quality Workshops

Maine Lake Data

The Lakes of Maine website hosts all of the lake data our volunteers collect. Find out more about the data we have available at www.lakesofmaine.org.


Lake Pages

Looking for your QA Certification # or Lake MIDAS#?
How about your lake report or depth maps? Check out your individual Lake Page.

You’ll find information about your lake, including water quality data, maps, volunteer lists, past plant surveys and a link to local weather.

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.