Area of Tambon OM Noi, amphur Muang, Khon Kaen province, and nearby, because this area is supported by stones of rock salt with high risk substances threaten to hit saltwater the bottom insert.
Tambon Tha Muang Khon Kaen and nearby, the area is an area that supports a layer of rock salt Sarakham have a higher risk of being intruded with salt water below.
The area of tha Phra, Khon Kaen and vicinity, because this area is the area supported by salt rock of Mesozoic rock Sarakham has a high risk of being inserted push with salt water below.