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Harmful Liver Toxins Found in Algae in Snake River Near Clarkston by MMcNamara Fox 28, August 21, 2025

WCPH says the harmful bloom is located "intermittently" in the stretch of river between Nisqually John Landing near Clarkston and Little Goose Dam.

A sample was taken from the river near Nisqually John Landing and tested on August 18. On August 21, results indicated that the water tested positive for microcystins, liver toxins harmful to both humans and animals.

Algae blooms such as this one in a river system may also migrate through river currents, WCPH reminded residents.

"Do not drink, swim, wade, use personal watercraft, water ski, or boat in waters where there is a visible bloom," WCPH said.

Residents and visitors were also advised to wash skin and clothing with soap and water following any contact with algae and keep pets away from the area.

Related Pages:
Toxic Algal Bloom Found on the Snake River for Second Year in a Row by Courtney Flatt, NW Public Broadcasting, 8/17/24
Whitman County Public Health Reports Harmful Algal Bloom Found in Snake River by Vinny Saglimbeni, KREM, 1/16/24
Algae Bloom in Lower Snake River by Bert Bowler, Spokesman-Review, 11/14/23
Large Snake River Toxic Algal Bloom Hasn't Happened Before by Courtney Flatt, NW News Network, 10/10/23
Toxic Algae Warning Issued for Little Goose Dam by Staff, Tri-City Herald, 10/3/12