Health alert issued for Willow Creek


September 28, 2023

The state has issued a health alert for Harmful Algal Blooms, also known as toxic blue-green algae, at Willow Creek Reservoir in Pierce County.

Samples taken last week at Willow Creek Reservoir measured above the threshold of eight parts per billion of total microcystin, which is a toxin released by certain strains of blue-green algae.

When a health alert is issued, signs are posted to advise the public to use caution, and designated swimming beaches are closed during the alert. Recreational boating and fishing are permitted, but the public is advised to use caution and avoid exposure to the w...

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