Originally Posted by ekjohns
The one thing you must absolutely do is add campden tablets for the chlorine. Coulmbus uses lots of it.
This seems to be the case, regardless of which of the 3 plants serve your house. Oddly, I didn't notice it until I actually dechlorinated my water, and smelled the difference. Now that my nose has been attuned to it, my tap water smells strongly like a swimming pool. The difference (before and after the campden, and 1 tablet is good for roughly 20 gallons) is really astounding.
There's a thread in the Brew Science section where I've posted some recent measurements for the Hap Cremean plant, in case anyone's interested.