Farmington Pond
E. coli Monitoring 2020

Update November 2, 2020

The Warning Advisory for Farmington Pond 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 3, 2020

Samples collected from Farmington Pond on August 28, 2020, continue to show high levels of E. coli. Concentrations remain above the recreational health advisory threshold of 409 MPN per 100 mL.

The health advisory remains in effect.

Sample Dates and MPN Values

  • August 28, 2020: 686.7 MPN per 100 mL
  • August 18, 2020: >2419.6 MPN per 100 mL
  • August 14, 2020: 307.6 MPN per 100 mL
  • August 5, 2020: 344.8 MPN per 100 mL
  • July 30, 2020: >2419.6 MPN per 100 mL
  • July 23, 3030: 63.7 MPN per 100 mL
  • July 17, 2020: 108.1 MPN per 100 mL
  • July 9, 2020: 648.8 MPN per 100 mL
  • June 30, 2020: 1732.9 MPN per 100 mL
  • June 25, 2020: >2419.6 MPN per 100 mL
  • June 19, 2020: 770.1 MPN per 100 mL
  • June 12, 2020: 488.4 MPN per 100 mL
  • June 3, 2020: 727 MPN per 100 mL
  • May 27, 2020: 435.2 MPN per 100 mL

Update June 29, 2020

Samples collected from Farmington Pond on June 19, 2020, and June 25, 2020, showed an increase in E. coli levels from previous samples. Concentrations remain above the recreational health advisory threshold of 409 MPN per 100 mL.

The health advisory remains in effect.

Sample Dates and MPN Values

  • June 25, 2020: >2419.6 MPN per 100 mL
  • June 19, 2020: 770.1 MPN per 100 mL
  • June 12, 2020: 488.4 MPN per 100 mL
  • June 3, 2020: 727 MPN per 100 mL
  • May 27, 2020: 435.2 MPN per 100 mL

Update June 16, 2020

Samples collected from Farmington Pond on June 12, 2020, showed a decrease in E. coli levels from samples collected on June 3, 2020. Concentrations, however, remained above the recreational health advisory threshold of 409 MPN per 100 mL.

The health advisory remains in effect.

Sample Dates and MPN Values

  • June 12, 2020: 488.4 MPN per 100 mL
  • June 3, 2020: 727 MPN per 100 mL
  • May 27, 2020: 435.2 MPN per 100 mL

Update June 5, 2020

The Davis County Health Department detected elevated levels of E. coli on May 27, 2020, during routine sampling at Farmington Pond. E. coli values from these initial samples were above the recreational health advisory threshold of 409 Most Probable Number (MPN) per 100 milliliters (100 mL). Follow-up confirmation sampling on June 3, 2020, showed these values had increased and continued to exceed the recreational health advisory threshold.

Davis County Health Department issued a health advisory on June 5, 2020, based on these data and posted signs advising the public to not swim or wade in the water.

Sample Dates and MPN Values

  • June 3, 2020: 727 MPN per 100 mL
  • May 27, 2020: 435.2 MPN per 100 mL