Trihalomethanes are commonly a by product of water chlorination.
Listening to news conferences, having trouble understanding why they are so quick to dismiss that this was a response to getting the Olympics.
"I doubt they could put it together in 18hours."
But, this announcement date was known well in advance, and I would not be surprised if there could be cells ready to go in more than one city... especially in Europe.
The public officials are WAY to quick to dismiss things.