COVID-19: In an effort to reduce the spread of COVID-19, The Utah Department of Environmental Quality is limiting person-to-person contact and will close our offices to the public starting on April 3. Please contact DEQ here to conduct business.

E. coli in Utah Waters

Note: The E. coli monitoring season ended on October 31, 2019. Warning Advisories and Exceedances are being removed from waterbodies. The Utah Department of Health and local health departments have determined that the health risk from E. coli from primary contact recreation drops with the onset of colder temperatures. DWQ is working with cooperators to post final data and monitoring updates for the 2019 monitoring season.


Escherichia coli or E. coli is a type of bacteria found in the intestines and feces of warm-blooded animals, including humans. While E. coli are not generally harmful themselves, their presence indicates feces or sewage contamination, which raises the possibility of disease-causing bacteria or viruses in the water. The presence of E. coli is used to determine if the public needs to be notified of a health risk.

The Division of Water Quality (DWQ) and local health departments sample surface waters for E. coli from May to October of each year. The health departments issue advisories when E. coli levels exceed health-based water quality standards.

Check 2019 Advisories & Exceedances

Track sample results and advisories as they are posted.

Contact Information

Ellen Bailey
E. coli Program Coordinator
(801) 536-4339

For questions about advisories or health risks associated with E. coli, contact your local health department or the Utah Department of Health (801) 538-6191.

Call Utah Poison Control Center

If you believe you or your pet have been exposed to E. coli, call (800) 222-1222.


Advisories, Exceedances, & Last Sample Date

= Advisory Issued
= Exceedance
= Advisory Lifted

= End of Season