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                      Background | 
                     
                    
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                      Chembarambakkam Lake is located in Chengalpattu district, about 40 km from Chennai. The Adyar River originates from this rainwater fed lake.  The lake is one of the major sources of drinking water in the city. The major  threats are the growth of water hyacinth and pollution from the surrounding  catchmnet area. The state government also proposed an industrial park in the neighboring  area. P. Raju, president of Welfare Association of Chembarambakkam Lake  Drinking Water Consumers moved the Chennai High Court in 2007 to save the lake.   | 
                     
                    
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                      CHRONOLOGY | 
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                      2004: Study was done by the scientists A. Surendran and  V.E. Nethaji Mariappan using remote sensing data. In the beginning of the year,  the hyacinth was concentrated only on the central and southern part of the  lake, the spread increased by December. Of the 656.43 hectares of the lake, the  dense aquatic cover has taken over nearly 333 hectares.   
                         
                        2007: P.  Raju, president of Welfare Association of Chembarambakkam Lake Drinking Water  Consumers in Chennai   City, files a Public  Interest Litigation against the state government. The government proposed to  build an industrial park near Chembarambakkam lake.  
                         
                        2007: The  First Bench, comprising Chief Justice A.P. Shah and Justice K. Chandru, granted  the interim injunction on the construction. 
                         
                        2008:  On September  2nd , that is just few days after the notification of the second  master plan of the Chennai city, the first set of major changes for the lake  has been forced by a government order (G.O. No.190, Housing and Urban  Development Department). Lands near Chembarambakkam lake were identified as  ayacut lands and classified as agricultural use.
                         
                         
                        June 2009: S Nandakumar of Kuthambakkam South, Poonamallee  block filed a PIL challenging the Government's decision to set up an Integrated  Solid Waste Management Facility (ISWMF) in the village. The village is a part  of the catchment area to this water body. 
 
The Madras High Court has said that no dumping of garbage  can be done until further orders.
                        
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