Because of recent events I was thinking about geting a water purefing plant in the house, so after doing a bit of online homework It advised that i got my water tested to see what it had in it ,as it said if you done this then you knew in which order to put the filters in you machean.

When I lived in France I took my water to the local Pharmacy and had it tested would this be the case here or not?

Only thing I could suggest is talk to a company called Nalco, they analyse process chemistry for industry and certainly test water samples for offshore O&G, dont think this is service offered by pharmacies in Thailand..