After a century-long ban, Parisians and tourists can now swim in the Seine River. Three designated swimming areas opened following a 1.4 billion euro cleanup effort for the Paris Olympics. While water quality meets European standards, daily testing continues, and flags indicate swim suitability. Concerns remain about water clarity and potential bacterial levels, despite officials assuring safety. Swimming is free and supervised until the end of August.

Prepared by Emily Rhodes and reviewed by editorial team.