The level of faecal bacteria in the Seine was above the World Aquatics standards of 400 colony-forming units of enterococci per 100 millilitres. The women's marathon swim competition is set for Thursday, while the men are scheduled to race Friday.
Archived version: https://archive.ph/vCwp1
The actual level they found in the river was 436 units per 100 millilitres. This is definitely the right call.