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 20200918

BGA Tracker

Upper Klamath Lake, Copco and Iron Gate Reservoirs, the Scott River, and the Klamath River between Iron Gate and the estuary are currently posted

Fish Health

 Readiness Level

 KlamathFishIcon orange

Mainstem Klamath- Iron Gate to Weitchpec- Orange
Weitchpec to Estuary- Yellow
All other Reaches- Green

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 20200918

View the Klamath BGA Tracker Interactive Map

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


Updated Posting Status

Yurok Warning 2 October 30, 2020- The Klamath River from Weitchpec to the mouth has been posted at the Warning Level 2 due to microcystin. This extends the previous posting from Weitchpec to Turwar on August 28th.

OR Advisory Red2 September 30, 2020-  The Upper Klamath Lake advisory from Sept 16th for Moore Park and surrounding areas has been expanded to the entire lake due to additional microcystin sampling data and the unpredictability of cyanobacteria blooms. 

Benthic Caution September 18, 2020- Scott River at Indian Scotty Campground and Jones Beach have been posted due to the presence of benthic cyanobacteria and Anatoxin-a. Please avoid contact with algae mats. 

OR Advisory Red2 September 16, 2020- Upper Klamath Lake near Moore Park has been posted due to microcystin. This advisory is for Moore Park and closely surrounding areas.

Yurok Warning 2 August 28, 2020- The Klamath River from Weitchpec to Turwar has been posted at the Warning Level 2 due to the detection of Anatoxin-A.

CA DangerTier2 Red2 July 13, 2020- Copco and Iron Gate Reservoirs have been posted at the Danger level. 

CA CautionActionTrigger Yellow2 July 13, 2020- The Klamath River from Iron Gate to Weichepec has been posted at the Caution Action Trigger level.

Yurok Caution 1 July 10, 2020- The Klamath River from Weichpec to the Estuary has been posted at the Caution level due to very low level detections of microcystin found in samples collected on July 7th and 8th at all mainstem Klamath sites on the Yurok Reservation. These are below the health threshold of concern but please use caution.


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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