CHENNAI: The residents of Avadi Municipality will soon be receiving drinking water to quench their thirst and a sewerage network to dispose off the waste water by November 2011, according to Metro Water Managing Director Dr K Gopal.  The water supply and underground sewerage scheme worth `261.89 crore which includes building eight overhead tanks, seven underground tanks, distribution of mainline for a length of 328 km and a pumping main for a length of 19 km will benefit 3.4 lakh people, said Gopal on Thursday.