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Scofield 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 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 2, 2020

Monitoring Update: On September 9, 2020, the DWQ HABs monitoring team visited Scofield Reservoir. The monitoring team observed a harmful algal bloom that appeared as grass clippings on or within the water surface and/or water column at Madsen Bay, Mountain View, near the dam, DWR Angler’s Access, and the SW beach. Cyanotoxin and cell density samples were collected and results are pending.


Update August 19, 2020

Scofield Reservoir was sampled on August 12, 2020, and had a concentration (2K cells/ml) of toxigenic cyanobacteria which is below the recommended advisory level (100K cells/ml).