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Piute Reservoir Algal Bloom Monitoring 2020

Due to state budget cuts, EPA is funding the Division of Water Quality’s harmful algal bloom program with a one-time grant. This limits DWQ’s monitoring to only 18 priority waterbodies in Utah.

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 August 19, 2020

Piute Reservoir was sampled on 8/11/2020 and had a cell concentration (21K cells/ml) of toxigenic cyanobacteria which is below the recommended advisory level (100K cells/ml). However, due to these levels a Health Watch remains.


Update August 14, 2020

  • August 5 cyanobacteria cell count results: 4747 cells/ml

Update July 9, 2020

Piute Reservoir is under a Health Watch after Utah State Park personnel observed surface and water-column cyanobacteria on July 3, 2020, near a swimming cove within the State Park. A Health Watch is not a formal advisory level but rather an indicator that a bloom may exist or become more severe based on available information from the DEQ Division of Water Quality (DWQ) and Department of Health. Indicators can include visual reports. The Central Utah Public Health Department and Utah State Parks have been notified.

DWQ plans to sample Piute Reservoir within the next seven days