Paris' Efforts to Clean Up the Seine for 2024 Olympics

Paris aims to host the 2024 Summer Olympics with the Seine as a key fixture, despite water contamination challenges and the need for a giant tank.

### Paris Races to Clean Up the Seine for 2024 Olympics Open Water Swimming Events
* 🏊  Paris Mayor Anne Hidalgo made the Seine a key fixture of the 2024 Summer Olympics, with plans for an **historic Olympics opening ceremony** and **open water swimming events**.
* 💩  Swimming in the Seine has been banned for a century due to sewage overflow, with the river containing **human feces**.
* 🚧  French officials have built an **enormous underground infrastructure project** near the river to **mitigate the contamination**.
* 🦠  A preliminary event in August 2023 was canceled due to **unacceptable levels of E. coli**, and water samples taken four months before the games still **exceeded the permissible limit**.
* 🌧️  Combined sewer systems in many cities, including Paris, lead to **spikes in E. coli levels** after heavy rain.
* 🏗️  The Austerlitz Basin, a **13.2 million gallon underground reservoir and tunnel**, is part of a **$1.5 billion project** to prevent sudden contamination of the Seine from combined sewer overflow.
* 🎖️  French officials aim to limit the opening of sewer overflow gates that dump into the Seine to **no more than twice a year** after the Olympics.
* 🎯  The long-term goal is to make the Seine swimmable again after the Olympics, with **three swimming sites opening to the public in 2025**.

Back in 2017, Paris Mayor Anne Hidalgo reinforced one thing in the city's final push to host the 2024 Summer Olympics: that its famous river, the Seine, would be a key fixture of the games, including an historic Olympics opening ceremony, the first held outside of a stadium. For which French officials initially said there is “no plan B,” and that open water swimming events would be held in it. It's not hard to see why. The Seine runs along some of Paris's most famous landmarks, like the Eiffel Tower and Notre Dame. The thing is, swimming has been banned in the Seine for a century. And that's because the River Seine has human sh*t in it. Like many urban waterways around the world, the Seine takes on sewage overflow during heavy rain when the city's underground sewer systems get overwhelmed with stormwater. Hidalgo even said she would take a swim in the Seine herself ahead of the games.

French President Emmanuel Macron promised the same thing. They say they're confident because of an enormous underground infrastructure project they've built near the river, to ensure as much as possible that it won't sh*t on their parade. This isn't the first time Olympic open water swimming events – the triathlon, para triathlon, and marathon swimming – were at risk of being canceled last minute due to water quality issues. We saw some of the same headlines during the 2020 Olympics in Tokyo and the 2016 Olympics in Rio de Janeiro. In both cases, they pulled it off. And Paris hopes to do the same. But the journey to clean up the Seine hasn't come without a few setbacks. A preliminary event in the river, scheduled for August 2023, was canceled when water analysis showed an unacceptable amount of E. coli in the water. E. coli are bacteria that originate in the intestinal tracts of warm-blooded animals. Presence of them in water is a strong indicator of “recent fecal contamination.”

Which can make you very, very, very sick. In order for an open
water swim event to be given the go-ahead, water analysis reports must be submitted no more than 48 hours prior to competition. Those samples cannot exceed more than 1,000 cfu – colony-forming units – of e. coli per 100ml of water. And 400 cfu of enterococci. Another bacteria... associated with feces. Test results published just four months ahead of the games showed that river samples taken at this bridge, the site of open water swimming events, still failed to get under that crucial 1,000 number for permissible levels of E. coli. You can see where this contamination is coming from by taking a look at this 1852 map. Showing how the original Paris sewer system was built. It dumps right into the Seine. Which is gross. But it's not a problem
that's unique to Paris. Many urban sewer systems work this way.

Before I get into that, though, I want to tell you about the sponsor of today's video, BetterHelp. I don't know about you, but this year feels like it has flown by. And I can't believe we're halfway through the summer already. Therapy is a great way to ground yourself in the present and help you set achievable goals for your mental health for the next six months. But finding time to talk to a therapist can be hard. That's where BetterHelp comes in. It's entirely online, designed to be flexible, convenient, and suited to your schedule. Just fill out a brief questionnaire to get matched with a licensed therapist, and switch therapists anytime, at no additional charge. Talk therapy has definitely been helpful for me, and if it's something that you want to try out too, get started with BetterHelp. Take a moment, visit BetterHelp.com/VoxVideo to get 10% off your first month. Many cities that built sewer systems

in the mid-1800s to early 1900s, like Paris did, installed what's known as a “combined sewer system.” In a combined sewer system, the same pipes that handle wastewater also handle stormwater, which gets collected through storm drains in the street. Everything gets sent along to be processed at water treatment facilities and then cycles out to the natural environment. When it rains a lot, the sewers can get too full. When this happens, rather than flooding back into the street, the excess combined wastewater and stormwater gets partially redirected to a nearby waterway. Which is why E. coli levels in water can spike dramatically in the hours following heavy rain. It's because that water was recently contaminated with sh*t. So you'll see signs near combined sewer outfalls that prohibit swimming after heavy rain. If that happens during the Olympics, it could mean canceling open water swimming events. So Paris built a giant tank. This 13.2 million gallon capacity

underground reservoir and tunnel, is part of a 1.5 billion USD infrastructure project that aims to clean up the Seine. It's called the Austerlitz Basin, built near the Austerlitz metro station, right by the Seine. With the tunnel running under the river to the sewers. French officials opened the basin less than three months ahead of the Olympics opening ceremony, which is scheduled for July 26th. I'll let this guy explain how it works. Basically, this system will hold excess water so the sewers don't get overwhelmed in a heavy rainstorm. And then it will methodically release the water back through the sewer system. Giant reservoirs like this have worked in other cities with big populations. Like the Thorton Composite Reservoir outside of Chicago, which can hold nearly 8 billion gallons of wastewater. And this combined sewer outflow facility in the Parerdegat Basin in New York – designed to prevent contamination of the basin

and nearby Jamaica Bay. The Austerlitz Basin isn't designed to clean the Seine. That's an ongoing, multi-pronged process. This project was built to prevent further – and sudden – contamination of the Seine from combined sewer overflow. The goal, according to French officials, is to resort to opening the sewer overflow gates that dump into the Seine no more than twice a year, compared to the current rate of 10 to 15 times per year. Paris will continue testing as the Olympics rapidly approach, but Hidalgo and Macron have yet to swim in the Seine. Even if all goes perfectly according to plan, a significant rainstorm could still contaminate the Seine, forcing open water swimming events to be postponed. The idea of making the Seine swimmable again goes beyond just the 2024 Olympic Games. [ARCHIVE] “It seems to be a good thing to start last in this annual race through Paris.

because the River Seine gets so full, you could almost walk over the swimmers in front.” It brings the city back to a time when the river was a place for Parisians to cool off in the summer,
instead of biohazard. Once the Olympics are over, that becomes the next phase of this project. According to Mayor Anne Hidalgo, three swimming sites in the Seine will open to the general public in 2025,
“thanks to the games.” As for the plan to host the opening ceremony along the Seine, French President Emmanuel Macron has now said that there are backup plans “if the security risk is too high.” Whether or not open water swimming will be possible can only be determined hours before the events and will be at the mercy of rain. Meaning making the Seine swimmable in time for the Olympics is going to take a lot of work and a lot of luck.

Can Paris fix its poop problem before the Olympics?

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Paris' Plan to Feature the Seine in the 2024 Summer Olympics

Paris Mayor Anne Hidalgo pushed for the Seine to be a central part of the 2024 Olympics, despite its historical ban on swimming due to sewage overflow.

The city has invested in an underground infrastructure project to improve water quality and is confident in its ability to host open water swimming events.

However, a setback occurred when unacceptable levels of E.

coli led to the cancellation of a preliminary event, showing the challenges in cleaning up the river for the Olympics.

Water analysis reports are crucial for open water swim events to ensure the water is not contaminated with bacteria such as E.

The Paris sewer system, dating back to 1852, dumps directly into the Seine, contributing to water contamination in the river.

Urban sewer systems around the world often work in a similar way, posing a common problem for open water events.

The Austerlitz Basin: Paris' Solution to Wastewater and Stormwater Management

Paris has built the Austerlitz Basin, a massive underground reservoir and tunnel, as part of a $1.

5 billion infrastructure project to prevent wastewater and stormwater overflow.

This system aims to hold excess water during heavy rainstorms and release it back through the sewer system methodically, in order to clean up the Seine and prevent contamination of waterways.

The Austerlitz Basin's opening, less than three months ahead of the Olympics, is crucial as it could potentially prevent the need to cancel open water swimming events due to high E.

The Effort to Make the Seine Swimmable for the 2024 Olympics

The Austerlitz Basin project in Paris is not aimed at cleaning the Seine but at preventing sudden contamination from sewer overflow.

French officials aim to reduce the dumping of sewer overflow into the Seine to no more than twice a year before the 2024 Olympics.

Despite efforts, the swimmability of the Seine during the Olympics is still uncertain and could be impacted by rainstorms.