Reclaimed water, sometimes called recycled water, is former wastewater (sewage) that has been treated and purified for reuse, rather than discharged into a body of water. In some locations, it is treated to be cleaner than standard drinking water,[1] and is used indirectly for drinking. In other locations, it is only intended to be used for nonpotable uses, such as irrigating golf courses and parks, filling decorative fountains, fire fighting, and irrigating crops that will be peeled or boiled before being consumed.

http://en.wikipedia.org/wiki/Water_recycling