>We have well water which is a great relief after hearing the pesticide and >chlorination threads. Still, we don't want to drink the softened water and >who knows what the neighbors are putting into the water table. So we >purchased one of the dual filter [snip] >Just pure, clean water. As long as you flush the bacterial buildup out of the filter. Sitting overnight the filters incubate a measurable growth of bacteria in the act carbon filter (and probably others) that may (and may only) contain pathogens. About a 2 minute flush each morning does the trick. If you're gone a weekend or a month, you still only need the 2-min flush. (based on undergrad research on municipal and well supplied household water systems in 1979). Logan VanLeigh