Protecting Public Health and the Environment.

Recreation Water Quality Health Advisories

This page provides information related to current recreation water quality health advisories involving cyanobacteria harmful algal blooms (HAB) and E. coli bacteria. The map and information table are updated with the most current information as health advisories are issued and lifted throughout the season.

Remember: Only a fraction of all water bodies in Idaho are monitored due to limited physical and monetary resources. The absence of an advisory is not an indication that a HAB or E. coli is not present at a water body. You are your own best advocate when ensuring your safety, and that of your family and pets. Be aware and "when in doubt, stay out."


Click pin for detailed information. Active HAB Advisory: Active E. coli Advisory: Lifted Advisory:

There are no current Harmful Algal Bloom advisories at this time.

Lifted Harmful Algal Bloom Advisories

County Waterbody Date Issued Date Lifted
Ada Esther Simplot Park 9/25/2018 10/8/2018
Owyhee C.J. Strike Reservoir 9/19/2018 10/17/2018
Valley Lake Cascade 9/7/2018 10/16/2018
Canyon Lake Lowell 9/7/2018 10/12/2018
Twin Falls Salmon Falls Creek Reservoir 7/27/2018 10/10/2018
Camas Mormon Reservoir 7/27/2018 12/13/2018
Washington Brownlee Reservoir 7/25/2018 11/16/2018
Kootenai Fernan Lake 7/18/2018 12/4/2018
Elmore Little Camas Reservoir 6/22/2018 9/18/2018
Ada Eagle Island State Park Pond 7/25/2018 8/3/2018
There are no current E. coli advisories at this time.

Lifted E. coli Advisories

County Waterbody Date Issued Date Lifted
Canyon Lake Lowell 8/8/2018 9/25/2018

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Report a Bloom

While you're out recreating, notify us of a possible harmful algal bloom. Download the bloomWatch app to learn what to look for and report what you found. Learn more.

Additional Information

Related Pages

Cyanobacteria Harmful Algal Blooms

Cyanotoxins: Information for Public Water Systems