Sanitation
From WaterWiki
Search for "Sanitation" on Wikipedia, Wikimedia Commons, Wiktionary, Wikiquote, Wikibooks, Wikia, Wikitravel, Google (excludes "Wikipedia", adds "water"), Yahoo (excludes "Wikipedia", adds "water").In most cases, after water is used, the wastewater must be treated if the water is to be returned to the environment without environmental damage or danger to public health.
