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
Fremont Henrys Lake 8/7/2017 Gloeotrichia, Dolichospermum, Aphanizomenon, & Microcystis Andy Olson, Idaho Falls Regional Office, (208) 528-2611
Washington Brownlee Reservoir 7/28/2017 Microcystis Graham Freeman, DEQ Boise Regional Office, (208) 373-0461
Gooding Thorn Creek Reservoir 7/26/2017 Aphanizomenon Shell Howard, Twin Falls Regional Office, (208) 736-3886
Elmore Long Tom Reservoir 7/25/2017 Aphanizomenon Graham Freeman, DEQ Boise Regional Office, (208) 373-0461
Elmore Mountain Home Reservoir 7/25/2017 Aphanizomenon Graham Freeman, DEQ Boise Regional Office, (208) 373-0461
Elmore Little Camas Reservoir 7/18/2017 Aphanizomenon Graham Freeman, Boise Regional Office, (208) 373-0461
Camas Mormon Reservoir 6/23/2017 Cyanobacteria Shell Howard, Twin Falls Regional Office, (208) 736-2190

Lifted Harmful Algal Bloom Advisories


County Waterbody Date Issued Date Lifted
Kootenai Black Lake 6/28/2017 8/9/2017
There are no current eColi advisories at this time.

Lifted E. coli Advisories


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

Page Subscription

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