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Most Poisonous Lake World Record
Anderson Lake, located in Port Townsend, Washington has the unpleasant distinction to be known as the most poisonous lake.

Since 2008, Anderson Lake has been plagued with soaring levels of anatoxin-a, a potent nerve toxin produced by blue-green algae. The safety threshold for the toxin, which can kill in four minutes after ingestion, is one microgram per liter; Anderson Lake readings were at 172,640 micrograms per liter.

Blue-green algae occurs naturally and is usually benign, but at times, certain types will begin pumping out toxins. Researchers at Oregon State University are securitizing types of blue-green algae that live in Anderson Lake to see if the cyanobacteria contains the same DNA as those commonly found in similar freshwater lakes.

 
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Dam Owner Holds Water Hostage on Friendship Lake - Weeds and algae are prolific on Friendship Lake. While the Lake District owns a weed harvester, they are unable to launch due to low water levels. Dam owner/operator Chuck Pheiffer claims it is safer to operate the dam with the low water levels and will not release water to replenish the lake, but is willing to sell the hydroelectric dam.


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