The Seine used to be a toxic mess. Now it’s the hottest new swim spot in Paris
The Seine Used to Be Toxic. Now a Parisian Swim Spot
The Seine used to be a toxic river, yet today it has transformed into a popular swimming destination in Paris. As the city faces extreme heatwaves, the introduction of three official swim zones along the Seine offers a refreshing escape. With temperatures soaring to 104°F (40°C) in late June, the renewed access to the river’s waters has become a highlight for locals and visitors alike. This revival marks a significant shift in how Parisians interact with the Seine, turning a once-polluted landmark into a symbol of environmental progress.
A Century of Nudism and Innovation
Swimming in the Seine has been a part of Parisian culture for centuries. Originally, people swam in the river’s shallows during the 17th century, often nude as it was considered a natural, communal activity. However, by 1716, societal norms led to a ban, restricting public swimming to more structured settings. The 18th century introduced floating baths—wooden platforms with canvas covers—where individuals could enter the water safely. These platforms, known as “bains de Paris,” became a blend of leisure and innovation, reflecting the city’s evolving relationship with the river.
“Paris has always been a place where I could feel free, where the rhythm of the river and the energy of the streets merged into something magical. Now, the Seine isn’t just a backdrop—it’s part of the daily life I’ve come to cherish.”
By the 19th century, the tradition expanded into a social spectacle, with public baths serving as gathering spots for the city’s elite. The Piscine Deligny, a notable example, became a hub for swimmers and artists, even hosting events that later influenced the 1900 Paris Olympics. Yet, this cultural legacy faced challenges in the 20th century, as pollution and industrial waste threatened the Seine’s viability as a swimming location.
The Decline and Drowning of a Tradition
The Seine once faced a crisis that rendered it unfit for swimming. By the 1970s, untreated sewage and urban runoff had turned the river into an ecological disaster. Over half of the region’s sewage was directly dumped into the Seine, leading to a severe decline in water quality. This degradation left only three fish species surviving by 1970, underscoring the river’s troubled state. The ban on swimming, once a response to social concerns, became a symbol of the Seine’s pollution crisis.
For decades, the city’s outdated sewer system—constructed during Haussmann’s modernization—combined rainwater and wastewater, causing overflow during heavy rains. This system exacerbated the Seine’s pollution, making it a hazard rather than a recreational space. Even the Paris Triathlon was canceled in 2013 due to unsafe conditions, highlighting the river’s poor state. The tradition of swimming in the Seine, once a cherished part of Parisian life, seemed to fade into history.
A New Dawn for the Seine
The turning point came in 2016 when Mayor Anne Hidalgo revived a promise made by Jacques Chirac in 1988. Chirac had vowed to swim in the Seine as a gesture of its cleanliness, but his pledge went unfulfilled. Hidalgo, however, prioritized the Seine’s restoration. Her initiative included a €1 billion engineering project to modernize Paris’s wastewater infrastructure, connecting thousands of homes to a new sewer system. This upgrade redirected stormwater and sewage away from the river, allowing it to reclaim its former vitality.
The centerpiece of this effort is the Austerlitz basin, a massive underground reservoir near Gare d’Austerlitz. Designed to hold 50,000 cubic meters of stormwater, this structure prevents overflow into the Seine. With improved water quality, the river has become a safe and scenic space for swimming, reconnecting Parisians with their historic waterway. The Seine’s transformation from a toxic mess to a recreational haven is a testament to environmental resilience and urban planning.