Health officials warn of harmful bacteria in North Idaho’s Fernan Lake, north end of Hayden Lake

By: Valentin Termite

Outlets: Idaho Capital Sun

Published: August 7, 2026

Words: 292

Last Updated: 1 week, 4 days ago

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Officials from the Panhandle Health District, alongside the Idaho Department of Health and Welfare and the Idaho Department of Environmental Quality, issued public health advisories Aug. 6 warning of harmful cyanobacteria bloom in Fernan Lake and the upper end of Hayden Lake.

Cyanobacteria, referred to as harmful algae bloom and normally a natural part of Idaho’s water bodies, can multiply and release toxic chemical compounds – known as cyanotoxins – in …

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