You can add me to the list of tap water brewers. I used to drive an hour to get mountain spring water, but got tired of doing that. We are blessed with soft water here where I live. I just put an inline RV water filter on the end of a hose to take away some chlorine/ metallic flavors from the water. Works pretty well. Brewed a really good Kolsch recently that got 2nd place in its category at a local comp