Deer Creek Reservoir Recreational Monitoring 2021

Report a Bloom

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

Call Utah Poison Control Center

Poison Control (800) 222-1222

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

Update October 7, 2021 (Waterborne Pathogens)

On October 6th, the DWQ waterborne pathogens monitoring team visited Deer Creek Reservoir. Samples taken at Sailboat Beach, Island Park Marina and Rainbow Bay did not contain E. coli above recreational thresholds. Routine sampling will continue monthly


Update October 6, 2021 (HABs)

On October 6th, the DWQ HABs monitoring team visited Deer Creek Reservoir. Harmful algal blooms were not observed at all sites visited. Cyanotoxin and cell density samples were not collected. DWQ will continue routine monthly monitoring.


Update September 24, 2021 (HABs)

HABs samples taken on 9/14/2021 were returned on September 21st. The sample from Rainbow Bay contained a toxigenic cell density below the UDWQ/UDOH recommended Warning Advisory threshold of 100,000 cells/mL. DWQ will resume routine monthly monitoring.


Update September 16, 2021 (Waterborne Pathogens)

On September 14th, the DWQ waterborne pathogens monitoring team visited Deer Creek Reservoir. Samples taken at Sailboat Beach, Island Park Marina and Rainbow Bay did not contain E. coli above recreational thresholds. Routine sampling will continue monthly


Update September 15, 2021 (HABs)

On September 14th, the DWQ HABs monitoring team visited Deer Creek Reservoir. Harmful algal blooms were observed at Rainbow Bay and Island Park Marina. Harmful algal blooms were not observed at the State Park shore or Sailboat Beach. Cyanotoxin and cell density samples were collected and results are pending.


Update August 31, 2021 (HABs)

Samples taken from the reservoir on Aug 25, 2021 show toxigenic cell density results below UDWQ/UDOH recommended Warning Advisory threshold of 100,000 cells/mL. Routine monitoring will resume monthly.


Update August 26, 2021 (HABs)

The DWQ HABs monitoring team visited Deer Creek Reservoir on August 25th. Harmful algal blooms were observed at all sites visited. Cyanotoxin and cell density samples were collected and results are pending.

Deer Creek Harmful Algal Bloom

Deer Creek Reservoir,
August 26, 2021
Click for a larger version.


Update August 13, 2021 (Waterborne Pathogens)

On August 9th, the DWQ waterborne pathogens monitoring team visited Deer Creek Reservoir. Samples taken at Sailboat Beach, Island Park Marina and Rainbow Bay did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.


Update August 10, 2021 (HABs)

The DWQ HABs monitoring team visited Deer Creek Reservoir on August 9th. Harmful algal blooms were observed at Rainbow Bay. Cyanotoxin and cell density samples were collected and results are pending. Harmful algal blooms were not observed at Island Park Marina or Sailboat Beach.


Update July 22, 2021 (Waterborne Pathogens/HABs)

On July 20th, the DWQ waterborne pathogens monitoring team visited Deer Creek Reservoir. Samples taken at Sailboat Beach, Island Park Marina and Rainbow Bay did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.

The DWQ HABs monitoring team also visited Deer Creek Reservoir on July 20th. Harmful algal blooms were not observed at Sailboat Beach, Island Park Marina and Rainbow Bay. Cyanotoxin and cell density samples were not collected.


Update June 17, 2021 (Waterborne Pathogens)

On June 15th, the DWQ waterborne pathogens monitoring team visited Deer Creek Reservoir. Samples taken at Island Park Marina and Rainbow Bay did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.


Update June 16, 2021 (HABs)

On June 15th, the DWQ HABs monitoring team visited Deer Creek Reservoir. The monitoring team did not observe any harmful algal blooms at Rainbow Bay, Sailboat Beach, Charleston Day Use Area, Island Park Marina, or near the shore at the state park 05B. Cyanotoxin and cell density samples were not collected. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted.


Update June 2, 2021

The Division of Water Quality and the Utah Department of Health began monitoring for harmful algal blooms and waterborne pathogens on June 1st, 2021. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted.