This study aims to find out the suitable area for secure hazardous waste in southern of Thailand using Geographic Information System (GIS). To study the analysis scope under define of selecting location for secure hazardous waste regulation by Pollution Control Department (Article adjust, 2552) as flow: 1. Not in the watershed area at fist level and second level 2. Not in the conserve area, as nation reservation forestry, the reservation of wild animal and national reservation area 3. Far from the population community area at less 1,000 meters 4. Far from source of surface water on the ground, public water at less 700 meters 5. Level of water underground (rainy season) deeper two meters 6. Far from the location antique at less 1,000 meters 7. Far from the main street at less 300 meters 8. Land issue situation is no use, overgrown, empty, land no use any more 9. Texture type of land is bouldery 10. Land capacity not suit for painting or low plenty of soil 11. Far from the mine of water underground at less 700 meters. Adding factor for capacity suitable area is A./ Not in the level of slide earth B./ Not in the risk of flood area C./ The slope of area not over 3 percent. Mostly 14 factors, study result find that not found the suitable area for secure hazardous waste at southern of Thailand, when use 14 factors to reduce factor of the slope area not over 3 percent, find that there are suitable area amount 5.21 km
or 3,250 rai is 0.007% of the most area, the suitable area in 2 province is Surat Thani and Nakhon Si Thammarat.