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
Kootenai Fernan Lake 7/18/2018 Anabaena, Microcystis, Gloeotrichia, Woronichinia, Other Kristin Larson, DEQ Coeur d'Alene Regional Office, (208) 769-1422
Elmore Little Camas Reservoir 6/22/2018 Dolichospermum Chase Cusack, DEQ Boise Regional Office, (208) 373-0490
There are no current E. coli advisories at this time.

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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