Air Quality
Drinking Water
Environmental Response and Remediation
Waste Management and Radiation Control
Water Quality
Executive Director’s OfficeReport 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 1, 2021 (HABs)
On October 27th, the DWQ HABs monitoring team visited Big Sand Wash Reservoir. Harmful algal blooms were not observed. Cyanotoxin and cell density samples were collected and results were returned on 11/1/2021. The sample contained a toxigenic cell density below the UDWQ/UDOH recommended Warning Advisory threshold of 100,000 cells/mL. DWQ will continue to watch the reservoir closely.
Update October 22, 2021 (Waterborne Pathogens)
On October 4th, the Tri-County Health Department visited Big Sand Wash Reservoir. Samples from near the boat ramp did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.
Update October 18, 2021 (HABs)
On October 4th, the DWQ HABs monitoring team visited Big Sand Wash Reservoir. Harmful algal blooms were observed and cyanotoxin and cell density samples were collected. Results were returned on October 6th. The sample contained a toxigenic cell density of 106,141 cells/mL of Aphanizomenon, a known toxin producer, which is above the UDWQ/UDOH recommended Warning Advisory threshold of 100,000 cells/mL. DWQ will continue to watch the reservoir closely.
Update September 28, 2021 (Waterborne Pathogens)
On September 8th, the Tri-County Health Department visited Big Sand Wash Reservoir. Samples from near the boat ramp did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.
Update August 12, 2021 (Waterborne Pathogens)
On August 11th, Tri-County Health Department visited Big Sand Wash Reservoir. Samples from near the boat ramp did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.
Update July 1, 2021 (Waterborne Pathogens)
On June 21st, Tri-County Health Department visited Big Sand Wash Reservoir. Samples from near the boat ramp did not contain E. coli above recreational thresholds. Routine sampling will continue monthly.
Update June 2, 2021
The Division of Water Quality and the Utah Department of Health began monitoring for waterborne pathogens on June 1st, 2021. As UDWQ and UDOH continue to visit and monitor waterbodies, updates will be posted.
