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East Canyon Reservoir Algal Bloom Monitoring 2020

Harmful algal bloom monitoring has ended for the season. Regular sampling updates to the Utah Recreational Water Monitoring Map will resume in spring 2021.

Report a Bloom

24-Hour DEQ Environment Incidents Line: (801) 536-4123

Call Utah Poison Control Center

If you believe you or your pet have been exposed to a harmful algal bloom, call (800) 222-1222.

Update November 2, 2020

The Warning Advisory for East Canyon Reservoir has been removed as a result of the end of the sampling and monitoring recreation season.

The Utah Division of Water Quality’s water recreation season runs from May 1 through October 31. At this time, no further monitoring or sampling for harmful algal blooms or waterborne pathogens at priority water bodies will be conducted until May 2021.

This does not mean that the potential for harmful algal blooms or waterborne pathogens has ceased. Please remain aware while recreating in or near water bodies and for information on how to keep yourself, your family, and your pets safe, please visit:


Update September 15, 2020

Weber-Morgan Health Department has issued a Warning Advisory for East Canyon Reservoir.

On September 11, the DWQ HABs monitoring team visited East Canyon Reservoir. The monitoring team observed a cyanobacteria bloom (HAB) at Taylor Hollow. Toxigenic cyanobacteria cell count densities samples were taken and results are pending.

East Canyon, Taylor Hollow, September 11, 2020

East Canyon, Taylor Hollow, September 11, 2020
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Update August 28, 2020

Health Watch: This is not a formal advisory level but rather an indication that a bloom may exist or become more severe based on available information from Utah DWQ and Utah Department of Health.

Monitoring and Sampling Update

On August 26, 2020, the DWQ HABs monitoring team visited East Canyon Reservoir. The monitoring team observed a harmful algal bloom at Taylor Hollow that appeared as green, isolated clumps on or within the water surface. Cyanotoxin and cell density samples were collected.

Results delivered from Phycotech on August 28, 2020 show toxigenic cell count densities at 55,880 cells/mL at Taylor Hollow, which is below the DWQ/DOH Recreational Health Threshold for an advisory. Cyanotoxin results are still pending from UDAF Lab.

East Canyon

East Canyon
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