http://www.thehindu.com/features/homes-and-gardens/where-does-your-sewage-go/article6665020.ece
http://www.thehindu.com/features/homes-and-gardens/you-can-now-rent-an-stp/article7715627.ece
http://www.cewindia.com/kannan_pasupathiraj_features.html
http://www.indiawaterportal.org/sites/indiawaterportal.org/files/IWP_FAQ_STP-wastewater_0.pdf
http://www.thehindu.com/news/cities/bangalore/its-sewage-treatment-at-source-now/article8276773.ece
http://kspcb.gov.in/STP-Guide-web(Lo).pdf
http://www.cpcb.nic.in/upload/NewItems/NewItem_195_STP_REPORT.pdf