The City of Paris and the publicly-owned company Eau de Paris have monitored the Seines water quality daily forE.

coliand enterococci bacteria, which represent fecal contamination.

This is especially important with Paris and the Seine, where overflow from old sewers can cause contamination.

Seine 2024

Beijing Youth Daily / Getty Images

We know that a rainy day tends to be worse, Cherabuddi told Verywell.

Swallowing contaminated river water can cause diarrhea, stomach cramps, rashes, eye infections, or ear infections.

[O]ur results tell us that the water over the last two weeks was fine.

However, for the Olympic Games, I cant predict this.

This tank, known as theAusterlitz basin, was ready for use at the end of May.

Thats not taking care of everything.

Thats when then washout of fecal bacteria is greatest, increasing your risk of gastrointestinal illness, Exum said.

Should You Swim in an Urban River?

Bacterial contamination is not unique to the Seine.

Many urban rivers around the world have unsafe levels of runoff from untreated sewage.

Paris officials believe the cleanup efforts will allow for safe public swimming in the Seine by 2025.

Environmental Protection Agency.What affects human health at the beach.