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:
Active Harmful Algal Bloom Advisories
|County||Waterbody||Date Issued||Dominant Taxa||DEQ Contact|
|Washington||Brownlee Reservoir||7/10/2020||Anatoxin-a, Microcystin||Boise Regional Office, Chase Cusack, (208) 373-0550|
|Kootenai||Fernan Lake||7/22/2020||Dolichospermum, Microcystis, Gloeotrichia||Coeur d Alene Regional Office, Bob Steed, (208) 769-1422|
|Latah||Spring Valley Reservoir||10/2/2020||Dolichospermum, Woronichinia||Lewiston Regional Office, Sujata Connell, 208-799-4370|
|Valley||Cascade Reservoir||10/5/2020||Microcystin||Boise Regional Office, Chase Cusack, (208) 373-0490|
Lifted Harmful Algal Bloom Advisories
|County||Waterbody||Date Issued||Date Lifted|
|Adams||Hells Canyon Reservoir||7/10/2020||11/10/2020|
|Twin Falls||Cedar Creek Reservoir||8/11/2020||11/13/2020|
|Twin Falls||Thorn Creek Reservoir||8/11/2020||11/13/2020|
|Owyhee||CJ Strike Reservoir||9/18/2020||10/29/2020|