Thursday, June 18, 2026

The Paris Olympics $1.5 Billion Seine Cleanup Yields Mixed Results

  • Open-water swimming events at the Olympics concluded Friday.
  • No competitions were canceled despite questions about water quality.
Grace Hollars-USA TODAY Sports

The final open-water swimming competition of the Paris Olympics concluded Friday, bringing an end to a tumultuous, dramatic, and expensive saga.

The city of Paris spent $1.5 billion to clean up the Seine river, which ultimately hosted five events during the Games despite questions about water quality and its safety for swimming. But that exorbitant expense wasn’t enough to quell disruptions.

Pollution in the Seine, particularly E. coli levels, has fluctuated throughout the Olympics, in large part due to heavy rainfall before and during the Games. And while no competitions were canceled, several practice sessions were called off, and the men’s triathlon was delayed one day.

Mixed Results

Hungary’s Kristóf Rasovszky won the gold medal in the men’s 10-kilometer marathon swimming event that took place in the iconic river Friday after Dutch swimmer Sharon van Rouwendaal won the women’s event Thursday. Ahead of the men’s competition, Sweden’s Victor Johansson dropped out, claiming the Seine’s river quality had made him sick.

On Monday, Germany won gold in the triathlon mixed relay after Belgium pulled out of the competition because one of its team members got sick. At the time, it was believed Claire Michel fell ill from swimming in the Seine during the women’s triathlon, but it was later determined to be a virus.

Last week, Great Britain’s Alex Yee won the men’s triathlon, but only after the event was pushed back one day to July 31 because of poor water quality when the Seine was tested the day before. France’s Cassandre Beaugrand won the women’s triathlon, which went ahead as scheduled July 31.

Swimming in L.A.

In 2028, open-water swimming at the Los Angeles Olympics is set to take place at Long Beach. The venue will span 11 miles of waterways connected to more than 5 miles of sandy beaches.

The most recent budget projections for the entire Los Angeles Games have come in around $7 billion, compared to potentially $10 billion for the Paris Olympics, once the final numbers come in.

This field is for validation purposes and should be left unchanged.

Sign up for
The Memo Newsletter

Get the biggest stories and best analysis on the business of sports delivered to your inbox twice every weekday and twice on weekends.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Linkedin
Whatsapp
Copy Link
Link Copied
Link Copied

What to Read

Exclusive

White House Visit in the Works for Viral World Cup Fan

“Freddy” may be on his way to the White House.

U.S. Open Tees Off With Smaller Crowds, but Plenty of Traffic

Total daily crowds will not surpass 30,000 fans this week.
Jun 18, 2026; New York, NY, USA; A New York Knicks Champions bus passes during the New York Knicks Championship Parade through the Canyon of Heroes.

Knicks Get Key to NYC in Front of Huge Crowds

The city deployed 10,000 police officers to the one-mile parade route.

Why U.S. Open Host Sites Are on a 25-Year Plan

The U.S. Open has already picked out 22 future sites through 2051.

Featured Today

Wisconsin Badgers forward Laila Edwards, left, and defender Caroline Harvey celebrate after Edwards scored against the Minnesota Gophers in the first period in a game Saturday, February 8, 2025, at LaBahn Arena in Madison, Wisconsin.

Two Rookies Are Rewriting Women’s Hockey Stardom

Their platforms are a mutual boon for the PWHL and its players.
Ai sports slop
June 5, 2026

How Sports Became Ground Zero for AI Slop

The category is the perfect breeding ground for AI content churn.
FILE PHOTO: Soccer Football - FIFA World Cup - UEFA Qualifiers - Group A - Germany v Luxembourg - Rhein-Neckar-Arena, Sinsheim, Germany - October 10, 2025 Germany coach Julian Nagelsmann
June 4, 2026

‘Weird Corners of the World’: How to Find a World Cup Coach

National associations look for a winning record—and also hope for serendipity.
June 3, 2026

The Elite High Schools Hosting World Cup Teams

Spain, Morocco, Croatia, and Switzerland chose schools as their tournament base camps.

Dallas Stars ‘Getting Married’ to Plano With $3B Arena Move

The NHL team sees its forthcoming home city as a regional hub.
June 3, 2026

Stars Arena Move Deepens Downtown Dallas Sports Exodus

Both the Stars and Mavericks are seeking to build new arenas.
June 5, 2026

Bears Taking New $5B Stadium Plans Across State Line to Indiana

The decision arrived just four days after political inaction by Illinois leaders.
Sponsored

Midge Purce Sounds Off on the Trinity Rodman Rule

Midge Purce discusses the Rodman Rule and the future of NWSL.
June 1, 2026

Indiana’s Bears Stadium Bid Gets More Real After Illinois Misses Chance

Recriminations rise as Illinois leaders fail to ratify a Bears stadium bill.
June 1, 2026

Illinois’ Last-Minute Push for $5B Bears Stadium Runs Out of Time

The state Senate approved a dramatically reworked stadium bill.
May 31, 2026

Bears $5B Domed Stadium Plan Hits Make-or-Break Day in Illinois

Political negotiations are going down to the final hours in Illinois.
Apr 6, 2026; Arlington, Texas, USA; Seattle Mariners catcher Cal Raleigh (29) walks to the on deck circle during the game against the Texas Rangers at Globe Life Field
May 28, 2026

Why Ballparks Are Louder Than Ever

Some stadiums sound like veritable nightclubs. How did we get here?