KBMP Vision

The Klamath Basin Monitoring Program facilitates the coordination and implementation of water quality monitoring in support of the stewardship, protection, and restoration of all beneficial uses within the Klamath River watershed, with the ultimate goal of restoring water quality. Learn More

Blue-Green Algae Map

BGA Tracker 201701120

BGA Tracker

Copco Reservoir, Iron Gate Reservoir, the Klamath River reaches between Iron Gate and Happy Camp, and from Weitchpec to the estuary are currently posted

Fish Health

 Readiness Level

 KlamathFishIcon yellow

All Rivers- Yellow
Learn more about fish health and KFHAT

Blue-Green Algae Tracker

Blue-Green Algae Tracker

In the Klamath Basin blue-green algae blooms typically occur between June and October when temperatures rise and water conditions are favorable for algal growth. Blue-green algae monitoring typically occurs May - November. If river conditions exceed public health standards for toxic algae the area is posted with a health advisory sign.

 BGA Tracker 201701120

Due to a gap in funding during the 2019 bloom season, the KBMP

BGA Tracker Interactive Map may not be up to date. For up to

date reports, please check California's HAB Incident Reports


Updated Posting Status

Below Threshold October 3, 2019- Upper Klamath Lake- The Oregon Health Authority lifted a recreational use health advisory today for Upper Klamath Lake. 

Below Threshold July 22, 2019- The reach between Lake Euwana and Shovel Creek (above Copco Reservoir) are not currently posted.


CA DangerTier2 Red2 July 22, 2019- Copco Reservoir is above California's Caution Action Trigger threshold for cyanotoxins.


CA DangerTier2 Red2 August 15, 2019- Iron Gate Reservoir is above California's Danger Tier 2 threshold for cyanotoxins. 

CA CautionActionTrigger Yellow2 August 28, 2019- The Klamath River from Iron Gate Hatchery Bridge to Orleans is above California's Caution Action Trigger threshold for cyanotoxins.

Below Threshold August 15, 2019- The Klamath River from Walker Bridge to Tully Creek is currently not posted for cyanotoxins.

Yurok Caution 1 July 26, 2019- The Klamath River from Tully Creek to the estuary meets the Yurok Tribe's Level 1, Caution level.


About the Tracker

The BGA Tracker Map was built to inform the public and research community regarding river conditions. The Tracker utilizes current information to track  and map the blue-green algae blooms throughout the Klamath Basin. The Blue-Green Algae Tracker identifies blue-green algae public health threats  (i.e. exceeds health thresholds identified in the appropriate guidance) by river reaches bounded by public health monitoring locations.

River reaches which exceed applicable criteria for public health are indicated by different colors on the map that vary depending on the number of tiers within each jurisdiction's advisory thresholds. Advisory colors within the map are:                 



Yurok Tribe   Yurok Caution 1 Yurok Warning 2 Yurok Danger 3


Blue-green Algae Official Notifications

Other Information


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