The quality of Seine water improves

The water quality of the Seine has improved, test results showed on Thursday, three weeks ahead of the start of the Paris Olympics when the river is set to host outdoor swimming events.
Results published by the Paris mayor’s office showed that E.Coli bacteria levels at an Olympics swimming spot in central Paris had fallen to within acceptable limits for four days in a row following warm and sunny weather in the French capital.
“This positive development is a consequence of the return of sunshine and warmth as well as the effects of the work done as part of the strategy to improve the quality of the Seine’s waters,” a statement from the mayor’s office said.
The previous week, levels of E.Coli – a bacteria indicating the presence of faecal matter – had been above the upper limits used by sports federations every day at the Alexandre III bridge in central Paris, which is set to be the jumping off point for the swimming.
At one point, E.Coli levels were 10 times the upper limit of 1,000 colony-forming units per 100 millilitres (cfu/ml), with heavy rain in previous days blamed for a spike in untreated sewage in the waterway. The Seine is set to be used for the swimming leg of the triathlon on July 30-31 and August 5, as well as the open-water swimming on August 8-9.
The readings for enterococci bacteria last week – a second key measurement of water quality – also improved markedly and were within acceptable limits every day at the Alexandre III bridge. Sports Minister Amelie Oudea-Castera hailed a “clear improvement in the water of the Seine’s waters” and said the readings “enable us to envisage the competitions going ahead serenely”.
France has spent €1.4bn ($1.5bn) in the last decade trying to clean up the river by improving the Paris sewerage system, as well as building new water treatment and storage facilities.