Ten provinces with most arrested for the narcotics: 2009 - 2011
 2009 
RankProvincescase
1Bangkok53,571
2Chon Buri19,309
3Samut Prakan10,994
4Nakhon Pathom7,688
5Ratcha Buri5,660
6Kanchana Buri5,598
7Nakhon Ratchasima5,353
8Supan Buri5,057
9Ubon Ratchathani4,941
10Chiang Mai4,913
 ทั่วราชอาณาจักร235,455
 2010 
RankProvincescase
1Bangkok54,068
2Chon Buri21,396
3Samut Prakan11,033
4Nakhon Pathom8,476
5Ubon Ratchathani6,625
6Kanchana Buri6,429
7Ratcha Buri6,045
8Nakhon Ratchasima5,951
9Chiang Mai5,568
10Surat Thani5,181
 ทั่วราชอาณาจักร265,349
 2011 
RankProvincescase
1Bangkok72,295
2Chon Buri19,497
3Nakhon Ratchasima8,623
4Ratcha Buri8,362
5Ubon Ratchathani8,108
6Nakhon Pathom7,986
7Samut Prakan7,719
8Surat Thani6,712
9Chiang Mai6,628
10Nakhon Si Thammarat6,494
 ทั่วราชอาณาจักร324,956
Souce : The Royal Thai Police
Compiled by : Statistical Forecasting Bureau,  National Statistical Office