Paris Prepares the Seine for Olympic Swimming: Challenges and Contingencies

The Seine was mostly suitable for swimming between July 17-23, except for July 21 due to high bacteria levels. Paris is striving to clean the river for the Olympics, following a recent sewer issue. Olympic swimming events will proceed based on water quality, with contingency plans in place.

Paris faced a significant challenge just before the Olympics as the Seine was suitable for swimming six out of seven days between July 17-23, according to data revealed during the Olympics' opening ceremony on Friday.

Authorities disclosed that enterococci and E.coli bacteria levels exceeded legal limits on July 21, spotlighting the ongoing effort to clean the river. Historically, the Seine hosted swimming events during the 1900 Paris Olympics, and city officials have been working towards achieving similar standards.

A sewer issue last summer prompted the cancellation of a pre-Olympic swimming event. Current Olympic plans include the triathlon and marathon swimming segments, scheduled from July 26 to August 11, to take place in the river.

Paris Mayor Anne Hidalgo recently swam in the Seine to demonstrate its safety. Decisions on Olympic events will be made the night before based on assessments by a technical committee. If water quality is unsuitable, events will move to Vaires-sur-Marne or be adjusted into duathlons.