Well, the Seine is already a bit of desperate case. Jacque Chirac (mayor of Paris at the time) famously said in 1988 "I would swim in the Seine within 3 years,

Well, the Seine is already a bit of desperate case. Jacque Chirac (mayor of Paris at the time) famously said in 1988 "I would swim in the Seine within 3 years, with witnesses, to prove the Seine has become a clean river" to illustrate his commitment to clean the Seine. Spoiler alert, he never swam in it.