In the US Midwest Municipality, wastewater is being treated and recycled to save enough potable water to supply 7,000 homes and to manufacture biofuel to run cars.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/treating-wastewater-drink-and-drive
[2] http://admin.indiaenvironmentportal.org.in/category/author/marcus-n-allhands
[3] http://admin.indiaenvironmentportal.org.in/category/journal/everything-about-water
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-treatment-technology
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wastewater-recycling
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biofuel
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-supply
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us