TIME's new cover: Inside the billion-dollar effort to clean up the world's most romantic river
are expected on the riverbanks, more than seven times the capacity of France’s biggest stadium in northeast Paris.
Fortunately, the city says that as a result of recent infrastructure upgrades, the amount of untreated wastewater that ended up in the Seine in 2022 was 90% lower than 20 years ago. Despite this progress, pollution is still a problem; last year, 1.9 million cubic meters of untreated wastewater was spewed into the Seine. Dumping all of this into the river, officials say, is necessary to avoid saturating Paris’ sewage network and flooding the city when especially heavy rain hits.
The planned solution is centered on building the giant underground rainwater storage tank in southeastern Paris, which lies behind the cordoned-off construction site near the Austerlitz train station. There, a steep spiral staircase gouged into the ground opens into a giant, cavernous hole, walled with cement. When TIME visited in early February, two earthmovers were busily digging deeper and deeper, their lights illuminating the darkness, and their engines drowning out conversation.
and lax standards. There is a reason that it’s taken so long: most of the world’s largest cities were built long before modern sanitation networks were knit into urban planning. “You cannot put in a whole new sanitation system. It’s ridiculously expensive,” says Robert Traver, a leading urban-river specialist and engineering professor at Villanova University in Philadelphia.
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