you could collect it, store it, pump it and filter it for drinking water, but it would have to have several reverse osmosis filters, and an activated charcoal filter for me to be drinking it. plus, a few drops of bleach will purify alot of water.

this is something we want to do, since the price of water has increased so much. it would be nice to have an underground storage tank of potable water.

in our landscaping endeavors, we are trying to go to low water plants with out putting ugly cacti and such in the yard. using bark and partially decomposed wood as a soil topper to keep in moisture, drip irrigation, etc.