Toxic algae health advisory in effect for Offut Lake and Lake Lawrence - Nisqually Valley News

Toxic Algae Health Advisory

Thurston County Public Health and Social Services has reported toxic algae blooms for Offut Lake and Lake Lawrence.

Lab results from Offut Lake on Oct. 22 detected microcystin toxin levels at 41.7 µg/L, and results from Lake Lawrence on Oct. 21 detected microcystin toxin levels at 10.9 µg/L, exceeding the state recreation guideline of 8.0 µg/L.

Microcystins are a liver toxin and a possible human carcinogen, causing illness in livestock and pets that drink affected water.

Microcystins are a liver toxin and a possible human carcinogen.

Author's summary: Toxic algae blooms reported in two lakes.

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Nisqually Valley News Nisqually Valley News — 2025-10-30

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