Dissolved Oxygen and Temperature

A lake’s dissolved oxygen and temperature patterns influence the physical, chemical, and biological qualities of the lake. Lakes over 15 feet deep will go through an annual thermal stratification pattern where three horizontal layers develop over summer. Lakes shallower than 15 feet are different and frequently mix throughout the summer months. These patterns influence available habitat for lake life and the different chemical properties of a lake.

Seasonal temperature and dissolved oxygen measurements are used to determine stratification patterns and potential oxygen depletion. When collected over multiple years, we can track changes that may be occurring due to shifts in trophic status or environmental stressors. Check out our DO/Temp fact sheet to learn more.

Dissolved oxygen and temperature measurements are taken over the deepest location throughout the summer months. Volunteers will need a canoe, kayak, paddleboat, or motor boat.

Details

• Cost to enroll:

  • $60/ year if you rent a MiCorps DO/Temp Meter.

  • $30/year if you use your own meter (only YSI models 550A or Pro20 are approved for CLMP use).

• Enrollment deadline: April 1, 2025

• Equipment requirements: A DO/Temp meter: YSI models Pro 20 or 550A

• Time commitment: Volunteers measure DO/Temp twice per month from mid-May through mid-September.

• Training requirement: Training for this parameter is required. See training events here and watch the recorded phosphorus training videos below.

How do I measure Dissolved Oxygen and Temperature?

• DO/Temp Procedure Checklist

• 2025 DO/Temp Data Form

• DO/Temp Recorded Training Presentation (2024)

• YSI Pro 20 Calibration Video

• YSI 550A Calibration Video

• How to change your YSI dissolved oxygen membrane

• Visit the Training Page for in-person and virtual training events.

Additional Information

• DO/Temp Fact Sheet

• Sampling Reminders

• DO/Temp Plotting Paper

• CLMP Graph Builder

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