Ten provinces with most water sold: 2009 - 2011   2009   Rank Provinces Cubic Metre 1 Chon Buri 95,542,231 2 Pathum Thani 88,173,244 3 Samut Sakhon 60,155,808 4 Khon Kaen 36,015,641 5 Songkhla 32,417,102 6 Chiang Mai 30,605,381 7 Surat Thani 25,627,680 8 Chachoengsao 24,787,241 9 Rayong 24,018,032 10 Phra Nakhon Si Ayutthaya 21,647,583   Whole Kingdom     2010   Rank Provinces Cubic Metre 1 Chon Buri 101,291,586 2 Pathum Thani 95,691,316 3 Samut Sakhon 68,292,573 4 Khon Kaen 39,969,645 5 Songkhla 35,751,317 6 Chiang Mai 33,206,796 7 Chachoengsao 26,433,401 8 Surat Thani 26,405,655 9 Rayong 25,917,982 10 Phra Nakhon Si Ayutthaya 24,020,179   Whole Kingdom 959,613,961   2011   Rank Provinces Cubic Metre 1 Chon Buri 105,305,980 2 Pathum Thani 100,421,736 3 Samut Sakhon 73,100,979 4 Khon Kaen 40,250,787 5 Songkhla 35,631,968 6 Chiang Mai 33,442,239 7 Chachoengsao 28,460,014 8 Rayong 26,707,075 9 Phra Nakhon Si Ayutthaya 26,262,783 10 Surat Thani 25,626,686   Whole Kingdom 982,386,396 Souce : The Provincial Waterworks Authority Compiled by : Statistical Forecasting Bureau,  National Statistical Office