I've been wondering this myself. We have had a river in our basement and it all goes down the drain while we are paying for water! The water is a little murky here and to retrofit the drain setup we have would be more trouble than it's worth, but if you had the right setup/conditions, I bet you could do it.<br><br>
You might what to check the legalities (or not <img alt="" class="inlineimg" src="/img/vbsmilies/smilies/duck.gif" style="border:0px solid;" title="Duck">: ). I thought I heard that collecting/using rainwater is illegal in Denver. Crazy law, if that's true.