Secchi Disk Transparency and Dissolved Oxygen and Temperature

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Secchi Disk Transparency measures the water clarity by lowering an eight inch, black and white disk into the water until it disappears. Measurements are taken weekly or every other week from mid-May until mid-September.

Dissolved Oxygen and Temparature - During the summer, lakes with a depth of 25 feet or more will stratify into 3 layers. Each layer has unique oxygen and temperature properties. In many lakes the oxygen in deep water may be completely lost.  Fish will not live in these waters and chemical changes will occur that can impact water quality in the upper layers.

Lake Inventory Map

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