 About 110 metric tonnes of solid waste are collected from Thanjavur every day by door @-@ to @-@ door collection and subsequently the source segregation and dumping is carried out by the sanitary department of the Thanjavur Corporation . The coverage of solid waste management had an efficiency of 100 % as of 2001 . The underground drainage system covers 70 % of the city and the remaining sewerage system for disposal of sullage is through septic tanks , open drains and public conveniences . The Corporation maintains a total of 155 km ( 96 mi ) of storm water drains : 53 @.@ 27 km ( 33 @.@ 10 mi ) surfaced drains and 101 @.@ 73 km ( 63 @.@ 21 mi ) unlined drains . 
