Ten provinces with most customer of water: 2009 - 2011   2009   Rank Provinces Number 1 Chon Buri 231,007 2 Pathum Thani 218,865 3 Khon Kaen 136,244 4 Songkhla 107,002 5 Chiang Mai 104,988 6 Surat Thani 87,518 7 Nakhon Ratchasima 86,458 8 Rayong 80,605 9 Udon Thani 77,226 10 Chaiyaphum 71,836   Whole Kingdom 2,935,356   2010   Rank Provinces Number 1 Chon Buri 242,924 2 Pathum Thani 235,108 3 Khon Kaen 141,589 4 Songkhla 112,428 5 Chiang Mai 111,238 6 Surat Thani 94,059 7 Nakhon Ratchasima 93,321 8 Rayong 86,316 9 Udon Thani 80,475 10 Samut Sakhon 79,324   Whole Kingdom 3,106,914   2011   Rank Provinces Number 1 Chon Buri 254,978 2 Pathum Thani 247,685 3 Khon Kaen 148,872 4 Songkhla 117,987 5 Chiang Mai 116,797 6 Nakhon Ratchasima 98,659 7 Surat Thani 98,358 8 Rayong 92,244 9 Samut Sakhon 86,190 10 Udon Thani 83,339   Whole Kingdom 3,265,334 Souce : The Provincial Waterworks Authority Compiled by : Statistical Forecasting Bureau,  National Statistical Office