Seine River's Water Quality Improves Ahead of Paris 2024 Olympics

Recent tests show significant progress, but contingency plans remain in place for swimming events.

Authorities have invested $1.5 billion in cleanup efforts over the past decade.
Recent data shows E. coli levels within acceptable limits for most days between June 24 and July 2.
Backup plans include postponements or relocation to Vaires-sur-Marne if water quality deteriorates.
Heavy rainfall and climate change pose ongoing challenges to maintaining water quality.
The Seine will host the triathlon and marathon swimming events, with the opening ceremony also on the river.