KBMP Mtg. Countdown

Remaining until the KBMP Fall Meeting

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

Fish Health

 Readiness Level

 KlamathFishIcon orange

Scott River - ORANGE, All Other Sectors - YELLOW

Learn more about fish health and KFHAT

Blue-Green Algae Map

BGA Tracker 20210910

BGA Tracker

Upper Klamath Lake, JC Boyle Reservoir, Copco Reservoir and Iron Gate Reservoir, Tule Lake, the Klamath River from Iron Gate to the mouth, and the Trinity River are currently posted

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 20210910

View the Klamath BGA Tracker Interactive Map

For more information, please check California's HAB Incident Reports Map


Updated Posting Status

OR Advisory Red2 September 10, 2021- Upper Klamath Lake has been posted with a recreational use health advisory based on sample results collected on September 7th for microcystin. This expands the previous posting from July 30th for Upper Klamath Lake near Eagle Ridge.

OR Advisory Red2 September 10, 2021- JC Boyle Reservoir has been posted with a recreational use health advisory based on sample results collected on September 7th for microcystin. 

CA CautionActionTrigger Yellow2 August 25, 2021- The Klamath River from Iron Gate to Weitchpec has been posted due to multiple detections of anatoxin. 

Yurok Caution 1 August 16, 2021- Lower Klamath River from Weitchpec to the mouth has been posted by the Yurok Tribe at Caution Level 1 due to low-level detections of microcystin on August 10-11 at multiple locations on the mainstem Klamath River. 

CA WarningTier1 Orange3 August 4, 2021- Iron Gate Reservoir has been posted at the Warning level (was Caution) based on observations that algae in the reservoir appeared to be blooming strongly. 

 OR Advisory Red2 July 30, 2021- Upper Klamath Lake near Eagle Ridge has been posted with a recreational use health advisory based on sample results collected on July 27th for microcystin. Other areas of Upper Klamath Lake remain unaffected by this advisory.

 CA DangerTier2 Red2 July 21, 2021- Copco Reservoir has been posted at the Danger level (had been at Caution) based on sample results collected on July 13th for microcystin.  


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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