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    Harmful Algal Blooms (HAB)

    Lahontan Reservoir upgraded to a HAB WARNING Advisory

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HAB Advisory

Harmful Algal Blooms

This page will be updated with information on current Harmful Algal Bloom sites within Nevada State Parks. For a full list of HAB sites in Nevada, go here. Learn more about HABs by visiting the NDEP page, here

Spring Valley State Park (Updated: June 23, 2025)

Eagle Valley Reservoir, located in Spring Valley State Park, has been placed under a HAB Watch Advisory due to an active Harmful Algae Bloom. Visual assessments have indicated a possible bloom. Water tests are currently being conducted by the Nevada Division of Environmental Protection (NDEP). These toxic algae can cause serious health issues for humans and animals.

Echo Canyon State Park (Updated: June 30, 2025)

Echo Canyon Reservoir, located in Echo Canyon State Park, has been placed under a HAB Watch Advisory due to an active Harmful Algae Bloom. Visual assessments have indicated a possible bloom. Water tests are currently being conducted by the Nevada Division of Environmental Protection (NDEP). These toxic algae can cause serious health issues for humans and animals.

Lahontan State Recreation Area (Updated: July 1, 2025)

Lahontan Reservoir, located in Lahontan State Recreation Area, has been upgraded to a HAB WARNING Advisory. Visual and satellite imagery assessments have indicated an increase presence of Cyanobacteria. Water tests are currently being conducted by the Nevada Division of Environmental Protection (NDEP). These toxic algae can cause serious health issues for humans and animals.

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