Termites

I am not sure if this is the appropriate place to post this question, feel free to move or delete
I was doing an inspection of the home, on the property I am in the process of purchasing, and saw what I have since identified as termite swarm. (This is yet to be verified.) I googled the treatments and all the top answers so far are nasty insect killing (this means bees too) chemicals. One little bit mentioned ground water contamination too. So, as the water supply is a private well, this is also of grave concern to me.

Anyone have experience with termite control, or dealing with these chemical residues?

Any info or help much appreciated.

Side note: From what I understand, Virginia, USA has a termite problem, so everyone around here thinks it's normal and probably use aforementioned chemicals without question.