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Current SituationWhitman County Public Health has lifted the Health Advisory for toxic algae on the Snake River stretch from Nisqually John Landing to Little Goose Dam. This is in response to two consecutive water samples taken one week apart that tested below the state advisory level for toxins. This follows the harmful algal bloom management protocol set forth by the Washington Department of Health.
A Health Advisory was issued on August 21, 2025 after a water sample taken from the Snake River was determined to contain microcystins, a type of toxic algae known to produce potent liver toxins. Testing was performed routinely throughout the summer and fall, and water samples continued to contain high levels of microcystins until early October.
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