There is a government interactive map here:
?????? | gmis.longdo.com
you have to type in the location of your area (in thai) in the search box, Press enter (blue left hand button next to search box), this will then centre the map on your area.
Then you can click the icon on the map legend (top left hand side).
If you zoom in to your local area, icons appear showing what wells/boreholes have been sunk nearby (if any), depth and width of pipes, plus use and water type are indicated.