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How do I take a Secchi disc reading?

April 26, 2017Disc Reading secchi

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How do I take a Secchi disc reading?

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First, anchor your boat over the deepest part of the lake. Lower your secchi disc into the water over the shady side of the boat (do not wear sunglasses). Keep lowering the disc until you can no longer see the white of the disc (eg. 3.0m). Note this depth and then raise the disc slightly until you can see it again (eg. 2.8m). Note this depth as well. The average of these two depths is your secchi depth (eg. 2.9m).