Protecting Public Health and the Environment.

Algal Bloom Health Advisories

The purpose of this page is to provide information related to current cyanobacteria — blue-green algae — blooms in Idaho lakes, ponds and streams. DEQ will share information regarding cyanobacteria blooms and provide a link to algal bloom-related health advisories issued by public health districts. 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 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 Advisory: Lifted Advisory:

There are no current advisories at this time.

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DEQ Guidance

Harmful Algal Blooms

Harmful Algal Bloom FAQs

Related Pages

Blue-Green Algae and Harmful Algal Blooms

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