First of all, let me say we like our Berkey very much. We have ran a few hundred gallons of water though it, and are very impressed with it’s purification ability. With our shallow well, we were never able to drink or cook with the water before, due to high levels of fertilizer, pesticides and E. coli. Now we can safely use that water, and have eliminated the expense of bottled water, as well as the waste stream of plastic bottles. We are so happy with the unit, we have become a dealer, so check it out at http://www.green-trust.org/products/.