 Half of the 20,000 houses upstream, whose sewage was going into the river, will be connected to the mains drainage by July. Practically all the houseboats too. I'm confident that it will make the Seine clean enough for the Olympics and to allow swimming in the Seine for the general public in three places in Paris from next year. I go back down to the side of the river where children on bateau mouche tourist boats scream every time they go under a bridge.