https://tamilthoguppu.com/2018/08/09/chennaiites-request-for-sewage-treatment-plants-in-lake/
Chennaiites request for sewage treatment plants in lake - News Today | First with the news
Aug 9, 2018 - Setting up a common Effluent Treatment Plant (ETP) could prevent the effluents mixing with lake and the Sewage Treatment Plants (STPs) should be used...
sewage treatment plants