Dissolved Oxygen Data Forms & Procedures

D.O./Temp. Water Quality Monitor Forms & Procedures

Taking a Dissolved Oxygen Profile

Dissolved Oxygen/Temperature water quality monitors receive training to become certified and follow strict protocols, ensuring the quality and high value of the data they collect. Below are instructions and field sheets used by Dissolved Oxygen monitors.

Each spring as a volunteer you receive a packet with new field sheets, mailing instructions and personalized information, including your Secchi Simulator login.

Instructions for DO Monitors

Dissolved Oxygen Meter Guidelines

The following table is to be used by volunteer lake monitors who measure temperature and dissolved oxygen (DO) levels in their lakes. This information is supplemental to material presented during DO training and certification workshops, as well as instructions for the calibration and operation of individual dissolved oxygen meters.

Maximum Dissolved Oxygen Concentration Saturation Table

Wet Kit Reagents

Instructions for Total Phosphorus Sampling

Is your Secchi reading less than 2.5m?  Call it in to LSM at 207-783-7733.  Please include your name, lake, town, and date of the reading.

Field Sheets

Notice Do Not Print Field Sheets on Inkjet Printers. Field sheets must be completed in the boat at the time of your readings. There is a good chance your forms will get wet and inkjet printing runs when wet. Please use a laser printer or contact the LSM office and we will gladly mail you extra data forms.

D.O. Monitor Field Sheet
DO Field Sheet

Dissolved Oxygen Form Instructions

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

If you think your Dissolved Oxygen (DO) meter would benefit from an annual checkup, consider bringing or sending it to the Lake Stewards of Maine’s (LSM) Annual “Meterfest”. Once a year in April, LSM and Maine DEP staff offer volunteer lake monitors the opportunity of a FREE checkup of their equipment.

We will check the functionality and accuracy of your meter, perform routine maintenance, if necessary, diagnose and resolve minor problems, and provide you with a report of our findings.

WHERE: If you would like to have your meter, cable and probe checked, you must either mail or drop-off your meter at the LSM offices in Auburn, or at the Maine DEP in Augusta. In either case, you must first contact us by email or phone and let us know that the equipment is coming, so that we can be sure that someone will be available to receive it.  Addresses and contact information for both locations are provided in the required checklist, linked below.

WHEN:  Next year’s MeterFest dates will be determined over the winter; please check back!

YOUR RESPONSIBILITIES: We will be happy to check your DO meter, providing that you do all of the following:
• If you plan to mail the equipment, be sure to contact us in advance
Mailed equipment must be carefully packed, and insurance is strongly recommended. If you want us to mail the equipment back to you, please provide return postage. In many cases, we are able to deliver the equipment to an agency office relatively close to you. Pick-ups are preferred to mailing.
VERY IMPORTANT: Please be sure to include fresh batteries, membranes and electrolyte that are compatible with your meter model.
• If you have experienced problems with your equipment, please include a written description of the issue(s).
• If we feel that the equipment requires a “field check” we will contact you about the possibility of keeping the unit after the lab check.
• If we determine that your equipment has a problem that we are unable to resolve, we will contact you with recommendations.

Please contact us if you have questions concerning this opportunity to ensure that your DO monitoring equipment is in “top shape” for the lake monitoring season.

Additional Resources

Water Quality and Invasive Plant Patrol Workshops

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

Graphing Secchi Disk Transparency Instructions (pdf)

Quality Assurance Project Plan (pdf 150k). The QAPP (“Quality Assurance Project Plan”) is a guide for proper procedures for lake water quality monitoring by volunteers in the LSM. This plan has been reviewed and approved by the U.S. EPA, and describes the LSM structure and how we assure that quality data are gathered. It can serve as an example of how a formal Quality Assurance Plan should be constructed.

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.