For the first time in over 100 years, Parisians and tourists alike can officially swim in the River Seine. A century-old ban put in place back in 1923 due to concerns over water quality and public health has now been lifted as the city unveils three new designated swimming zones in the heart of Paris. Located near the Eiffel Tower, Notre-Dame, and in the eastern Parc Rives de Seine, these areas have been kitted out with lifeguards, changing rooms, showers, and daily water quality monitoring. The first public swims are scheduled to begin on 15 July, following a soft launch during the 2024 Olympic and Paralympic Games, when open water events took place in the river.
This move isn’t just about summertime fun. It marks the culmination of a massive environmental restoration effort and a €1.4 billion clean-up campaign led by the city, one that’s been decades in the making. The aim was always ambitious: not only to host Olympic swimming events safely in the Seine, but to make the river a part of everyday Parisian life again.
A century of pollution reversed
The scale of the transformation is enormous. In the early 20th century, industrial waste and untreated sewage poured into the Seine, turning it into a dumping ground rather than a public amenity. Since then, efforts to improve water quality have slowly gained traction, but it was only with the 2018 launch of Paris’s “Swimming Plan,” driven by outgoing Mayor Anne Hidalgo and building on work started by Jacques Chirac in the 1990s, that a real timeline was set. The plan was tied closely to preparations for the Olympics, which served as a hard deadline for delivering swimmable water.
As part of the clean-up, more than 20,000 homes and houseboats were connected to proper sewage networks, and enormous infrastructure was built to manage waste water. The most striking example is a massive underground rainwater basin near the Austerlitz train station, which can hold up to 50,000 cubic metres of stormwater. This was designed to stop untreated sewage from entering the river during heavy rain, which was previously a regular problem. According to The Guardian, the water quality has now met EU standards for safe bathing on most days.
During the Olympics, wet weather did cause concerns about bacterial spikes, forcing the cancellation of some practice sessions. But the events themselves went ahead, and post-Games monitoring showed consistent improvements. With regular testing in place, and a flagging system to warn swimmers of any pollution risks, officials are confident that the Seine is now clean enough for daily use, though swimming remains confined to specific zones.
A model for urban river restoration
The reopening of the Seine isn’t just about Paris. It’s part of a growing global trend of cities reclaiming their rivers for public use. From Berlin’s Spree to Zurich’s Limmat, urban waterways are being cleaned and reimagined as social and recreational spaces. In Paris, the stakes were especially high. The Seine is a UNESCO World Heritage site and a key part of the city’s identity.
For Parisians, the emotional pull is strong. Many older residents remember a time when people swam in the Seine freely, and the dream of bringing that back has lingered for generations. The return of legal swimming is being treated as a major civic moment. As noted by AP News, the reopening of the river is a “symbol of resilience and renewal,” and a reminder of what sustained environmental policy can accomplish.
Beyond symbolism, the impact on biodiversity has been notable too. Fish species in the Seine have increased from just three in the 1970s to over 30 today, thanks to better water quality and a more stable ecosystem. The city is also planning to extend the project to the wider Île-de-France region, with 14 new swimming areas proposed along the Seine and Marne rivers outside of Paris proper.
The project hasn’t been without criticism. Some scientists have voiced concern that the daily water tests, while reassuring, may not always capture short-term spikes in pollution. Others have noted the limits of the infrastructure during extremely heavy rain, when even the new retention basins can overflow. There are also worries about equity: while the three swimming zones are free and open to all, they’re geographically concentrated in central Paris, which could exclude people in outlying districts.
What it means for other cities
For cities across Europe and beyond, Paris’s success offers both inspiration and a blueprint. Rehabilitating a river isn’t cheap—it took years of political will, public investment, and complex engineering—but it is possible. And with urban areas getting hotter and more crowded, access to clean, local swimming spots is becoming a real public health issue.
Urban swimming offers not just relief from heat, but opportunities for community gathering, environmental education, and ecological regeneration. The Seine’s reopening has already sparked interest in similar efforts elsewhere. London, for instance, has seen a push for safe swimming spots in the Thames, and groups in cities like Manchester and Glasgow are exploring their own river clean-up initiatives. The Paris model shows that with the right investment, it’s feasible to give urban rivers back to the people.
This summer, as Paris Plages returns, with its artificial beaches lining the Seine, locals and visitors will experience something new: real swimming in a river once deemed too polluted to touch. Whether it becomes an everyday habit or just a seasonal treat, it’s a landmark moment in the relationship between city and nature.
As France continues to grapple with climate extremes and urban stress, the reopening of the Seine feels like a hopeful gesture, a reminder that even the most damaged parts of a city can be reclaimed, renewed, and made joyful again.