Blackridge 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 21, 2021 (HABs)

On October 20th, the DWQ HABs monitoring team visited Blackridge Reservoir. The monitoring team observed a harmful algal bloom near the beach area. Cyanotoxin and cell density samples were collected and results are pending. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted.


Update September 30, 2021 (HABs)

The Warning Advisory for Blackridge Reservoir has been removed by the Salt Lake County Health Department.

Blackridge Reservoir has had several weeks of toxigenic cyanobacteria cell density results below the UDWQ/UDOH recommended Warning Advisory threshold of 100,000 cells/mL.

Although the Warning Advisory has been removed, please remain vigilant and if you see signs of a bloom, stay out of the water and call the 24-Hour DEQ Environment Incidents Line: (801) 536-4123.


Update September 15, 2021 (Waterborne Pathogens)

On September 13th, the DWQ monitoring team visited Blackridge Reservoir for routine waterborne pathogen monitoring. Samples from the beach area did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.


Update September 14, 2021 (HABs)

The Warning Advisory for Blackridge Reservoir remains in place.

On September 13th, the DWQ HABs monitoring team visited Blackridge Reservoir. The monitoring team did not observe a harmful algal bloom near the beach area. Cyanotoxin and cell density samples were collected and results are pending. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted.


Update August 31, 2021 (HABs)

The Warning Advisory for Blackridge Reservoir remains in place.

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 Warning Advisory for Blackridge Reservoir remains in place.

On August 25th, the DWQ HABs monitoring team visited Blackridge Reservoir. The monitoring team observed a harmful algal bloom near the beach area. Cyanotoxin and cell density samples were collected and results are pending. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted.

Keep yourself, your family, and your pets safe during a harmful algal bloom.


Update August 19, 2021 (Waterborne Pathogens)

On August 16th, the DWQ monitoring team visited Blackridge Reservoir for routine waterborne pathogen monitoring. Samples from the beach area did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.


Update August 18, 2021

The Salt Lake County Health Department has issued a Warning Advisory for Blackridge Reservoir.

Samples taken from the reservoir on August 16, 2021, show toxigenic cell density results at 58,490 cells/mL of Planktothrix, a known toxin producer.

Keep yourself, your family, and your pets safe during a harmful algal bloom.


Update August 17, 2021 (HABs)

On August 16th, the DWQ HABs monitoring team visited Blackridge Reservoir. The monitoring team observed a harmful algal bloom near the beach area. Cyanotoxin and cell density samples were collected and results are pending. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted.


Update July 16, 2021 (Waterborne Pathogens)

On July 12th, the DWQ monitoring team visited Blackridge Reservoir for routine waterborne pathogen monitoring. Samples from the beach area did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.


Update July 13, 2021 (HABs)

On July 12th, the DWQ HABs monitoring team visited Blackridge Reservoir. The monitoring team did not observe a harmful algal bloom near the beach area. Cyanotoxin and cell density samples were not collected. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted

Update June 16, 2021 (Waterborne Pathogens)

On June 14th, the DWQ monitoring team visited Blackridge Reservoir for routine waterborne pathogen monitoring. Samples from the beach area did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.


Update June 15, 2021 (HABs)

On June 14th, the DWQ HABs monitoring team visited Blackridge Reservoir. The monitoring team did not observe a harmful algal bloom near the beach area. 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 (HABs/Waterborne Pathogens)

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.