The fishery operation in Udon can do that. I use for the pond water. Not sure if it would be complete enough for drinking water. It's free so worth a try I suppose.
I reserve the right to be wrong, mispell words type badly. leave words out of sentences because my mind works faster then my fingers. To be an OLD GIT I've earned it
The regional science center, just down the Khonkaen highway from the driver's license facility in Non Sung (โนนสูง) does drinking water testing. Bring a few liters in a very clean plastic container. They provide their analysis in English if you ask for it. Takes a few days.