Protecting Public Health and the Environment.

Recreation Water Quality Health Advisories

The purpose of this page is to provide information related to current cyanobacteria — blue-green algae — and E. coli bacteria advisories in Idaho. DEQ will share information and provide a link to health advisories issued by public health districts or other agencies. The map and information table will be 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. A water body with no advisory is not an indication that a bloom or bacterial outbreak is not present. 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:

Active Harmful Algal Bloom Advisories

County Waterbody Date Issued Dominant Toxin DEQ Contact
Ada Blacks Creek Reservoir 9/22/2017 Aphanizomenon and Microcystis Graham Freeman, DEQ Boise Regional Office, (208) 373-0461
Benewah Spicer Pond 8/18/2017 Microcystis and Aphanizomenon Robert Steed, Coeur d'Alene Regional Office, (208) 769-1422

Lifted Harmful Algal Bloom Advisories

County Waterbody Date Issued Date Lifted
Ada Esther Simplot Park Pond No. 2 9/6/2017 9/28/2017
Canyon Lake Lowell 8/25/2017 11/20/2017
Fremont Henrys Lake 8/7/2017 11/6/2017
Washington Brownlee Reservoir 7/28/2017 9/14/2017
Gooding Thorn Creek Reservoir 7/26/2017 12/7/2017
Elmore Long Tom Reservoir 7/25/2017 11/7/2017
Elmore Mountain Home Reservoir 7/25/2017 11/7/2017
Elmore Little Camas Reservoir 7/18/2017 11/7/2017
Camas Mormon Reservoir 6/23/2017 12/7/2017
Kootenai Black Lake 6/28/2017 8/9/2017

Active E. coli Advisories

County Waterbody Date Issued Advisory Contact
Canyon Lake Lowell 9/8/2017 Katrina Williams, Southwest District Health, (208) 455-5317
Bannock Mink Creek 8/28/2017 Caribou-Targhee National Forest, Westside Ranger District, (208) 236-7500
Bannock Stream 8/28/2017 Hannah Sanger, City of Pocatello, (208) 234-6518

Lifted E. coli Advisories

County Waterbody Date Issued Date Lifted
Ada Esther Simplot Park Ponds 6/21/2017 8/17/2017

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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.

Related Pages

Blue-Green Algae and Harmful Algal Blooms

Blue-Green Algae and Harmful Algal Blooms: Information for Public Water Systems