Armaell

Which is what they exactly did. They reported the initial competition day due to weather concerns and waited until enough time passed with good conditions

Except it does not continuously fail. You can check meseurements here : https://www.paris.fr/pages/meteo-de-la-seine-quelle-est-la-qualite-de-l-eau-du-fleuve-27467 Water is tested multiple time a day and we can see that water was at acceptable level the days of competition