The Seine used to be a toxic mess. Now it’s the hottest new swim spot in Paris



Paris — 

If you’re visiting Paris this summer season, it’s your decision to add swimming in the Seine to your itinerary. And after the warmth this metropolis has seen in the previous few weeks, you might completely want to.

Paris simply skilled its hottest day on document, with temperatures topping 104 levels Fahrenheit (40 Celsius) in late June. With a third heatwave set to hit subsequent week, the opening of three swim spots alongside the river couldn’t come at a higher time.

From Saturday, Parisians and vacationers can take a refreshing plunge in the Seine, for the second summer season in a row. A century-old ban has given manner to what’s quick turning into a new Parisian summer season custom.

The seasonal opening on Saturday has been timed to mark 250 years of Franco-American friendship. For American guests, there might be no extra quintessentially Parisian manner to have fun the 4th of July than a dip in the Seine.

Though many are treating river swimming as a fashionable novelty, Paris has a deep, sophisticated historical past with the Seine.

It all started in the seventeenth century as a informal, nude observe straight off the river’s sloped banks — a behavior initially banned in 1716 on the predictable grounds of public decency. That restriction gave manner to floating baths in the 18th century: flat-bottomed vessels draped in canvas the place bathers climbed down inner ladders to swim straight in the river’s present inside a marked-off security space.

By the Nineteenth century, bathing had advanced from a fast cool-down into a main social and sporting occasion. Wealthier institutions alongside the banks provided eating places, cafés and swimming classes. One of them, the Piscine Deligny, turned one among the metropolis’s most trendy spots, ultimately internet hosting swimming occasions for the 1900 Paris Olympics.

The river’s golden age started to fade round the flip of the Twentieth century. A wave of drownings and river-traffic accidents led to the French authorities implementing a whole ban on swimming in 1923.

As this photo from 1929 shows, Parisians enjoyed swimming in the Seine before conditions degenerated.
It was still popular in the 1950s, but two decades later, it was declared off-limits.

The Deligny managed to survive the ban by rebuilding itself as a floating, filtered pool separate from the river water, carrying on as a Paris establishment till it mysteriously sank in 1993. Elsewhere, unauthorized bathing endured anyway, particularly throughout scorching climate, and a long-distance swimming race that had been held since 1905 continued regardless in defiance of the authorities.

But the actual loss of life of Paris’ swimming tradition wasn’t down to guidelines and laws — it was brought on by air pollution.

Water high quality skilled a catastrophic decline all through the mid-Twentieth century. By the Seventies, the Seine was, in impact, a flowing city cesspit: greater than half of the area’s wastewater was dumped straight into it untreated. The toll on its ecosystem was nearly terminal and by 1970, the river was successfully biologically lifeless, its fish inhabitants diminished to simply three resilient species.

Serious efforts to reverse the injury started in the mid-Nineteen Eighties, main to a political promise that might hang-out French management for a era. In 1988, Paris mayor Jacques Chirac, then working for reelection, made a daring pledge that inside three years, he would swim in the Seine in entrance of witnesses, to show the river was clear. He repeated the pledge on tv in 1990, nevertheless it by no means occurred, reworking it into a working joke. The Seine remained stubbornly toxic. As lately as 2013, the Paris triathlon had to be canceled outright as a result of the water high quality was too harmful for athletes.

The ghost of Chirac’s promise was lastly revived in 2016, when mayor Anne Hidalgo relaunched it forward of the metropolis’s 2024 Olympic bid. This time it took greater than a billion euros and a monumental engineering venture to overhaul the French capital’s wastewater remedy and join hundreds of riverside houses to the sewer community for the first time.

The massive effort to clean up the river was timed to coincide with the 2024 Olympic Games in Paris, which used the Seine for swimming contests.

The centerpiece of the operation is a cavernous, largely underground basin dug close to Gare d’Austerlitz. The construction is a huge concrete cylinder, 50 meters vast and 30 meters deep, held up by pillars sunk deep into the floor, able to holding 50,000 cubic meters of stormwater — roughly the quantity of 20 Olympic-sized swimming swimming pools.

Because Paris’ current sewers, constructed throughout Haussmann’s Nineteenth-century modernization of the metropolis, mix rainwater and wastewater in the similar pipes, heavy rain has at all times despatched the overflow straight into the river. Now, that extra will get diverted into the Austerlitz basin as an alternative, the place it’s held deep underground till the climate clears, then pumped regularly to remedy crops exterior the metropolis. Officials say the system has efficiently minimize the variety of main sewage overflow occasions into the Seine from 15 a yr to round two.

The operation was timed to be prepared for the Olympic triathlon and marathon swimming occasions. Despite some athletes reporting sickness afterward, no clear hyperlink to the water was confirmed, and the century-long psychological barrier to bathing in the Seine was lastly damaged. Despite the metropolis’s trademark scepticism, round 100,000 individuals confirmed up in the first public season in 2025.

The Seine made its modern public swimming debut in 2025. This year, with temperatures soaring, it's expected to be more popular than ever.

This summer season, the metropolis has refined the format, providing three distinct, free public swim spots.

At Bras Marie, beneath the Nineteenth-century Pont Louis-Philippe close to Notre-Dame, bathers get a quintessentially Parisian view of the outdated metropolis.

Grenelle, positioned additional west, affords swimming with direct views of the Eiffel Tower whereas dealing with a quarter-scale duplicate of the Statue of Liberty.

Bercy, in japanese Paris, is the largest of the three websites and the finest for anybody wanting a actual exercise: one among its two swimming pools stretches 67 meters, with the Bibliothèque nationale de France throughout the water.

A phrase of warning: this isn’t the Côte d’Azur. The water is extra khaki than turquoise, and swimmers may come throughout the odd little bit of floating particles, and the scent leaves one thing to be desired. But the expertise makes up for it.

Much like at seashores, there’s a flag system to point out whether or not it’s protected to swim: inexperienced means good to go, yellow means proceed with warning, typically due to robust currents or storms, and crimson means swimming just isn’t allowed, whether or not that be due to poor water high quality or climate circumstances.

The system isn’t infallible. Last July, the inexperienced sign was solely raised on 18 of 31 days. That’s as a result of the metropolis performs each day assessments for indicators of sewage contamination, primarily E. coli, at a number of factors alongside the river. If the sign is crimson, the swimming spots are out of bounds for a day or two whereas the river flushes itself out.

Yet the momentum is simple. Building from its sporting roots, the Grenelle spot will host open-water and high-dive occasions for the European Swimming Championships later this month — the first time Paris has held the competitors since 1931.

Whether the vastly costly cleanup was price it stays a matter of debate amongst Parisians. But as the subsequent heatwave rolls in and the metropolis begins to prepare dinner once more, the verdict might turn into clearer if many extra of them lastly determine to take the plunge.



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