up to now, there's been news or rumour other non O will require as well, i tend to think water being tested on the impact of imposing mandatory insurance, eg application no. before and after the policy enacted
avoid living near easily flooded area. As regards air quality, living in the southern regions such as phuket, better than the north including chiangmai, bangkok also not free from smog or pm2.5 recently, so better wear a face mask going out
maybe it means govt indirectly subsidize expats here (tourists and retirees) as govt hospitals and clinics are heavily funded by thai govt, i once visited a govt clinic (only once so far), the cost is unbelievably low 60baht compared to private hospital which often charged at least or about 1000baht, visit a specialist and it is 2000 in private hospital (tests and pills not included)