A mosquito pool in Brawley has tested positive for Saint Louis Encephalitis (SLE).

The pool, in the vicinity of Palm Avenue in the city of Brawley, tested positive on August 29, 2025, for the mosquito-borne disease. The Imperial County Public Health Department Vector Control Program maintains about 52 mosquito traps throughout the county, primarily in local city limits. Traps are checked several times a week and the mosquito pools are tested weekly. SLE is transmitted to humans through the bite of an infected mosquito. Mosquitos become infected when they feed on infected birds. Imperial County Health Officer, Dr. Stephen Munday said, " We want residents to take precautions, like eliminating standing water and using insect repellent, to help reduce the risk of mosquito-borne illness and protect their families and communities".