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Mike Dawson, Jefferson County water-quality specialist, sinks a bottle into Anderson Lake to obtain a monthly sample. The water will be tested for temperature, clarity and PH, and other factors. Dawson also will make a visual inspection for algae blooms at the troubled lake, a popular fishing hole south of Port Townsend.
Steve Ringman / The Seattle Times

Mike Dawson, Jefferson County water-quality specialist, sinks a bottle into Anderson Lake to obtain a monthly sample. The water will be tested for temperature, clarity and PH, and other factors. Dawson also will make a visual inspection for algae blooms at the troubled lake, a popular fishing hole south of Port Townsend.

NEW - 12:03 PM
Algae blooms that kill pose puzzles | PNW Magazine

Many algae blooms are harmless. But sometimes they produce poisonous toxins. Most common here is microcystin, which attacks the liver. More rare is anatoxin-a, which mysteriously thrives in sleepy little Anderson Lake. Anatoxin-a can kill a person in less than five minutes.

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