Last Updated on July 10, 2025
In 2009, the stretch of the Seine River that runs through Paris made headlines– and the news was unusually good. Wild Atlantic salmon had been spotted and caught in its waters for the first time in decades. Since the Seine has had high levels of industrial pollution since at least the early 20th century, ecologists saw the return of the once-thriving species as a promising sign of ecological recovery.
The city of Paris has since pursued an ambitious goal for its iconic river, home once again to over 30 species of fish– from trout to eels and perch. They have worked to clean the Seine up enough to allow the general public to swim in sections of it– so much so that athletes were allowed to take to the open waters during the 2024 Summer Olympics. And in summer 2025, they finally opened three swimming holes on the Seine to the general public, after a century-long ban (see more below).
The city has reportedly spent over 1 billion millions of Euros over the past years into efforts to purify the water– and severely limit the amount of waste that industrial companies, private homes and boats can dump into the Seine.
{Related: Key Moments in the Seine River’s History}
Safety Challenges Remain
While progress has been made over the past few years– and many species of fish, birds, and other wildlife have seen a hopeful resurgence– the main challenge in keeping the Seine swimmable long-term comes from heavy rain and storms.
These tend to flush problematic amounts of sewage into the river waters, leading to dangerous levels of e-coli and other bacteria. This problem led the Bassin de la Villette swimming pools to be temporarily closed in 2017.
And in summer 2024, in the lead-up to the Olympic Games, heavy rains often raised levels well above acceptable and safe limits. This made the task of keeping athletes safe a genuine challenge, and rainy conditions kept officials on edge throughout the Games.
An Ambitious Plan to “Regreen” the Seine & Its Banks – & New Public Swimming Holes in 2025
I have to admit that I’ve never wondered whether swimming in the Seine was doable, much less allowed. The current seems unpredictably strong, and even if the city *did* reduce pollution to levels they deem safe for a dip, I’d be a bit wary, especially given recent reports of high e-coli levels and illicit industrial dumping.
Splashing around or doing laps in the river has been formally banned since 1923. And most sneaky dips are attempted at night, when fines are less likely (but the dangers are greater).
Still, plans to “regreen” the Seine and its banks– part of Mayor Anne Hidalgo’s ambitious ecological objectives for the capital-– are ones I find admirable and worthwhile.
The Mayor’s Office, which said in the past that it aimed to open a total of 23 swimming areas on the Seine, opened three free swimming holes on the Seine in the summer of 2025. Open to the general public until the end of August and accommodating 1,000 swimmers per day across the three sites, these were created on the successful model of swimming holes created recently on the Bassin de la Villette in northeastern Paris.
One of the lifeguarded swimming areas in the city’s west offers dramatic views of the Eiffel Tower, while another is located near the Pont Marie, which bridges the Île de la Cité and the old Marais district. The third is located in the 13th arrondissement, near the French National Library and an existing open-air pool dedicated to Josephine Baker.
According to the Guardian,
About €1.4bn (£1.2bn) has been invested in the project including inconnecting more than 20,000 homes to the sewer system (the waste from which had hitherto been dumped directly into the Seine), improving water treatment facilities and building substantial rainwater storage reservoirs equivalent in size to 20 Olympic swimming pools to avoid overflows of sewage during rain storms.
Despite the aforementioned challenges posed by heavy rains and other unpredictable factors that might affect water quality, the current team at the Paris Mayor’s office has remained optimistic and determined to make the Seine swimmable in the long term. And Hidalgo has proven to be uncompromising in her other green plans for the city– to the delight of some and consternation of others.
A Long History of Seine Swimming (& Fishing)
Prior to the 20th century and the accelerated development of both industrial activity and public health infrastructures, it was relatively common to see bathers and swimmers casually enjoying the waters of the Seine, both within Paris and in the nearby suburbs.
Of course, the Seine has been the very heart of Parisian civilization from the city’s beginnings, as a source of food, water, and commerce. The pre-Christian, Celtic tribe known as the Parisii were avid fishers who established a village along the banks of the Seine and on the Ile de la Cité during the 7th century BC.
Later, their settlement developed into a vibrant city called “Lutetia”, and was incorporated into the Gallo-Roman empire.
Throughout the centuries, fishing and swimming in the Seine remained common activities, although swimming as a competitive sport only saw its advent in the late nineteenth century.
Paris hosted the Summer Olympics of 1900, and seven men’s swimming competitions took place on the Seine between the suburbs of Courbevoie and the Asnières bridge.
Then in 1905, a sports enthusiast started a popular swimming competition known as the “Traversée de Paris à la Nage” that saw hundreds of amateur swimmers take to the waters in central Paris.
Despite swimming in the Seine being officially banned in 1923, the competition continued well into the 1940s. It was only in the postwar era that the ban was strictly enforced.
Where Can You Swim on the Seine Now? Pools, Basins & More
Luckily, if you’re after a hot-weather dip in the capital, there are a few open-air options while we await the much-anticipated Seine swimming holes in 2024 and beyond. Here are a couple I recommend; you can find a fuller list of municipal pools and swimming areas in my piece at TripSavvy.
Piscine Josephine Baker
The Piscine Josephine Baker opened a few years ago, named after the legendary Franco-American performer and resistance figure of the same name. The 25-meter long, 10-meter wide floating pool is located next to the Bibliothèque Nationale’s (National Library’s) main site in the 13th arrondissement, on the left bank of the Seine. It’s equipped with four lanes for laps.
There’s also a large wading pool for kids, as well as a rooftop area perfect for sunning, plus hammam, sauna, jacuzzi and a gym. With a public pool like this one, who needs fancy spas?
Note that at present, reservations (for 2-hour sessions) are required.
Getting There: Quai François Mauriac, 75013 Paris (13th Arrondissement); Metro Quai de la Gare
The Bassin de la Villette Pop-Up Pools
The swimming holes created along a section of the Bassin de la Villette in 2017 have become incredibly popular summer fixtures in Paris. They’re free (although in high demand, so get there early) and generally open in tandem with the pop-up beach operation known as Paris Plages.
{Related: Why to Consider a Summer Trip to Paris?}
Ideal for kids, these pools are cordoned off from the rest of the canal system and have shallow areas ideal for beginners. There’s also a larger pool that’s best for adults, but don’t expect to do any Olympic-style laps here.
This pool is accessible for visitors with limited mobility (including those with wheelchairs).
Getting there: Access to the pools is from the Quai de la Loire, 75019 Paris (Metro Riquet or Laumière). They’re generally open from mid-July to mid-September, but check ahead of time. See more information here.
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Courtney Traub is the Founder and Editor of Paris Unlocked. She’s a longtime Paris resident who now divides her time (as well as she can manage) between the French capital and Norwich, UK. Co-author of the 2012 Michelin Green Guide to Northern France & the Paris Region, she has been interviewed as an expert on Paris and France by the BBC, Australian Broadcasting Corporation, Le Figaro, Matador Network and other publications. Courtney has also written and reported stories for media outlets including Radio France Internationale, The Christian Science Monitor, Women’s Wear Daily and The Associated Press. In addition to going down various rabbit holes of curiosity when it comes to French culture, history, food and art, Courtney is a scholar of literature and cultural history whose essays and reviews have appeared in various forums.
