Help Protect
Maine Lakes

Notices to Water Quality Monitors

NEW datasheets for 2022 Water Quality are available.

The spring mailing will be coming in the next few weeks.

If you need a form before then please download the appropriate datasheets for 2022…

LSM DEP Secchi FORM 142b 2022 EI03

LSM DEP DO FORM 142a 2022 EI03

ONLY LSM DEP FORM 142c Chemistry 2021

LSM DEP FORM Baseline 2022 EI03


NEW contact information for HETL total phosphorus kit ordering.

Please review the linked document for changes that have taken place in the contact procedure for ordering sample kits at the Health and Environmental Testing Laboratory.



Attention DO & Temp Lake Monitors:  Is your DO meter in need of a check-up?

Don’t miss out on MeterFest 2022!

Please send your Dissolved Oxygen (DO) meter in for its free annual checkup.

Lake Stewards of Maine (LSM) and Maine DEP (DEP) will check the condition and operation of your dissolved oxygen meter at no charge at this year’s annual MeterFest, and will conduct routine maintenance to the extent possible. We will also test the equipment in the lab and evaluate the performance of the meter.

Because of challenges raised from COVID-19 and the implementation of social distancing, MeterFest 2022 will be similar to the ‘20 and ‘21 approach. In order to reduce transmission of the virus, all meters must be shipped to the Department of Environmental Protection office in Augusta, preferably such that they arrive the week of April 4th.

This downloadable document provides instructions and has shipping labels for you to use when sending your DO Meter to DEP. Please note that DEP prefers that you use UPS or FedEx, if possible.  The return shipping label must be filled out and include with your meter so it can be sent back to you. You will also be asked to send in the first few profiles you collect again.

MeterFest Checklist COVID-19 v20220318

Download the document here.

Please don’t miss out on this great opportunity for a free check-up of your DO meter!

Contact information

Contact us at:     Phone: 207-783-7733       Email:

Hours of visitation at LSM Office:
  Mondays 9:00am - 3:00pm         Wednesdays 9:00am - 3:00pm
  Thursdays 11:00am - 3:00pm       Or by appointment

Our Mission

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 is a non-profit 501(c)(3) organization committed to the collection of information pertaining to lake water quality. For 50 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.