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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
Blue-Green Algae Map
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.
View the Klamath BGA Tracker Interactive Map
For more information, please check California's HAB Incident Reports Map.
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Updated Posting Status
November 12th, 2021- All lakes within the Klamath Basin and reaches of the Klamath River are no longer posted. Please see below for details.
November 12, 2021- The Klamath River from Weitchpec to the mouth has been deposted by the Yurok Tribe based on high flows and microcystin concentrations that are below recommended trigger levels. The health advisory has been lifted and posted signs at public access points should be removed.
November 5, 2021- The Klamath River from Iron Gate to Weitchpec has been deposted based on sample results that show microcystin concentrations have declined or remain below recommended trigger levels for at least the last two sampling events. The health advisory has been lifted and posted signs at public access points should be removed.
November 5, 2021- Copco and Iron Gate Reservoirs have been deposted based on sample results that show microcystin concentrations have declined or remain below recommended trigger levels for at least the last two sampling events. The health advisory has been lifted and posted signs at public access points should be removed.
November 2, 2021- The recreational use advisory for Upper Klamath Lake has been lifted based on sample results for microcystin that are below recreational guideline values.
September 28, 2021- The recreational use advisory for JC Boyle Reservoir has been lifted based on sample results for microcystin which are below recreational guideline values for people.
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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:
Oregon
California 

Yurok Tribe

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Blue-green Algae Official Notifications