DOH-Hillsborough Issues Mosquito-Borne Illness Alert
July 31, 2026
The alert is in response to a second confirmed case of locally-acquired dengue.
For media inquiries:
Claire Maher • Claire.Maher@FLHealth.gov • 813-559-4065
DOH-Hillsborough is informing residents of a confirmed human case of locally-acquired dengue.
DOH-Hillsborough has issued a health alert for the presence of harmful blue-green algae toxins in Lake Thonotosassa.
Listeriosis outbreak associated with a restaurant in Tampa with food consumption between March 2026 and June 2026.
Tests completed on Wednesday, July 8, 2026, indicate that the water quality at Davis Island beach does not meet the recreational water quality criteria for Enterococcus bacteria.
Offices will be closed July 2-6. Regular hours will resume on Tuesday, July 7, 2026.
DOH- Hillsborough cautions the public of the presence of blue-green algae in Bayport Colony Canal (private canal) on June 25.
DOH-Hillsborough urges residents with stable medical conditions who may need electrical equipment, oxygen, dialysis, or assistance from medical professionals for physical, cognitive, or medical needs, to register with the Florida Special Needs Shelter Registry.
The health alert is still in effect as of June 30, 2026, for the presence of harmful blue-green algae in Lake Thonotosassa. The alert is extended due to a repeated water sample taken on June 25. The public should exercise caution in and around Lake Thonotosassa.
Tests completed on Wednesday, June 3, 2026, indicate that the water quality at Davis Island beach does not meet the recreational water quality criteria for Enterococcus bacteria.