Environmental monitoring in Santa Catarina reported a substantial proportion of monitored coastal points as unsuitable for bathing, with elevated E. coli at several beaches. Authorities reported increased gastroenteritis linked to exposure to contaminated seawater and non-potable water, and advised avoiding swimming shortly after heavy rain and checking official water-quality updates before bathing.
Follow strict food and water hygiene. Only drink sealed bottled water or water that has been disinfected. Avoid ice of unknown origin. Eat thoroughly cooked food and peel fruit yourself. Wash hands regularly with soap and water or use hand sanitizer. Avoid swallowing seawater and avoid bathing in areas officially classified as unsuitable (especially after heavy rainfall). Seek medical advice if you develop severe diarrhea, fever, blood in stool, or signs of dehydration.