Residents of Östersund, Sweden are being advised to boil their water after potential E. coli contamination was detected in the water supply across a large portion of the municipality. Local authorities issued the warning as a precautionary measure following the discovery of the bacteria. The extent of the contamination and the source are currently under investigation. Until further notice, residents are urged to boil water intended for consumption, including for drinking, cooking, and brushing teeth. This precaution aims to eliminate any potential health risks associated with E. coli, which can cause illness. Updates will be provided as the investigation progresses and water testing results become available.