I bet its safe to drink. Probably about as safe as drinking saccharin which was in our punch as kids. I remmeber always seeing the warning that it causes cancer in lab animals.

But I don't predict an emergency type situation where I would want to drink pool water.

For this to happen, the city drinking water supply would have to get contaminated with poison, all the drinks in the supermarket are sold out, all the airports are shut down, and all the roads out of the city are destroyed. OK, if this happens I'll drink the pool.