What are the dangers of the high lake level in Okeechobee?

Many years of high water levels in the Lake made the Dike prone to “piping,” a leak that can lead to collapse. Erosion and Dike failure can also occur from water overtopping the Dike during major storm events. On a scale of Dam Safety Action Classification, the Dike is identified at Level 1 on a scale of 1-5.



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Toxic algae fed by agricultural fertilizers spread across the wide, shallow lake, which is the largest in the Southeast United States. The algae poisons the air, and seasonal rains threaten to swell the lake and disperse the contaminated water toward popular beaches.

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About 2,500 acres of estuaries are polluted, accounting for 99% of the total assessed. A big driverof that is Lake Okeechobee, which covers about 450,000 square acres and has been polluted by decades of agricultural and stormwater runoff.

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That “back-pumping” can carry with it fertilizers, pesticides and other pollutants that can lead to fish kills, toxic algae blooms and threaten drinking water supplies.

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The Florida Department of Health advises against it, according to its website. Fish tested from water with blue-green algae show that cyanotoxins don't accumulate much in the edible parts — muscle or fillet — of fish, but can in other organs, its website says. The safest choice is to not harvest or eat these fish.

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The Okeechobee Utility Authority usually pulls 2.5 million gallons per day from the lake. They can also pull from the Rim Canal nearby as a backup option. In about 15 to 20 minutes, raw lake water is drinkable.

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