Update November 2, 2020
The Warning Advisory for Deer Creek 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 21, 2020
Wasatch County Health Department has issued a Warning Advisory for Deer Creek Reservoir at all public access points.
On September 16, 2020, the DWQ HABs monitoring team visited Deer Creek Reservoir. The monitoring team observed a harmful algal bloom at Rainbow Bay and Island Park Marina. Cyanotoxin and toxigenic cell density samples were collected.
Results delivered from UDAF Lab on September 19, 2020 show the liver toxin, microcystin, concentrations greater than 50 ug/L which is at least 6 times greater than the DWQ/DOH Recreational Health Threshold for an advisory.
Update September 2, 2020
Wasatch County Health Department has issued a Health Watch for Deer Creek Reservoir.
On September 2, 2020, the DWQ HABs monitoring team visited Deer Creek Reservoir. The monitoring team observed a harmful algal bloom at Rainbow Bay, Charleston Day Use Area, Island Park Marina, and the shoreline at the State Park. Cyanotoxin and cell density samples were collected and results are pending.
Update July 15, 2020
DWQ HAB monitoring of Deer Creek Reservoir was conducted on July 15, 2020. A low-density HAB was observed at Rainbow Bay, Charleston Day Use Area, Island Park Marina, and the shoreline at the State Park. The dominant HAB material consisted of isolated clumps within the water column. Samples were collected at this location but results from the EPA Lab show cyanotoxins as non-detect.