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 20181030

BGA Tracker-

Upper Klamath Lake, Keno Reservoir, Copco Reservoir, Iron Gate Reservoir, and the Klamath River from Iron Gate to the Estuary are currently posted

Fish Health

 Readiness Level

 KlamathFishIcon yellow

All Rivers- Yellow
Learn more about fish health and KFHAT

Real-Time Data

Link to Real-Time WQ Map


The table above contains provisional data provided by the USGS via the waterservices site. All data are provisional and may be recalculated before final approval. This table may take several seconds to load.

* = value 2+ hours old
**=4 or more hours

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 Interactive Map    

BGA Tracker 20181207

Updated Posting Status

CA CautionActionTrigger Yellow2 December 7, 2018- Klamath River from Iron Gate to the I-5 rest area has been downgraded from Warning Tier 2 to Caution Action Trigger based on monitoring results showing microcystin toxins persisting in upstream Iron Gate Reservoir.

CA CautionActionTrigger Yellow2 December 7, 2018- Copco and Iron Gate Reservoirs has been downgraded from Warning Tier 2 to Caution Action Trigger based on monitoring results showing microcystin toxins declining but still present.

Below Threshold December 7, 2018- All other portions of the Klamath River not listed are below posting thresholds for cyanotoxins.

Yurok Caution 1 October 29, 2018- The Klamath River from Weitchpec to the Estuary has been downgraded to a posting status of Caution based on monitoring results from October 23-24th showing microcystin toxins are still present but at low levels. 


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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