Remember the 2024 Paris Summer Olympics?
The fortnight of intense and memorable sporting competition against the background of iconic landmarks amid brilliant sunshine in the French capital, days that will never be forgotten.
And the constant uncertainty about whether the River Seine would be clean enough to allow the open water swimming and triathlon events to take place.
The organizers set the ambitious goal of staging those events in a river long seen as too polluted for swimming and, despite the occasional hitch when heavy rain increased pollution levels, pulled it off.
Now, fulfilling a key legacy promise from the Games, the Paris authorities this summer are to allow the public to swim from July 5 at three points in the Seine which is now deemed safe for a dip.
"It was an extraordinary moment (in 2024), but swimming during the Games was not an end in itself," Paris mayor Anne Hidalgo told reporters.
"Making the Seine swimmable is first and foremost a response to the objective of adapting to climate change, but also of quality of life," she added.
Parisians and tourists alike will be able to take the plunge at bras Marie in the heart of the historic center, the Grenelle district in the west of Paris, as well as Bercy in the east.
Once a favorite pastime in Paris, swimming in the Seine had been off limits for a century until last year due to the pollution levels.
"This summer, Parisians and tourists will rediscover the joys of swimming in the Seine, a hundred years after it was banned," city hall said in a statement.
Swimming will be supervised and monitored, said Pierre Rabadan, deputy mayor of Paris in charge of sports. The city expects to welcome between 150 and 300 people at any given time at the three sites, which will close for the season at the end of August.
As on beaches, a system of flags -- green, yellow and red -- will make clear the safety of swimming according to the Seine's current and the quality of the water.
The water quality will be closely watched, after high levels of bacteria forced the postponement of some of the competitions on certain days during the Olympics.
Checks will be carried out daily, and swimming may be suspended in the event of rain, said Marc Guillaume, the prefect, the top state-appointed official, of the Ile-de-France region that includes Paris.
He expressed "even more optimism" about water quality than last summer, given the work done on making the river cleaner.
