Reverse Osmosis for water treatment

Dear friends, we want to ​treat our ​drinking water ​which we get ​from wells. ​ Which ​technology is ​best to use to ​desalinate ​the well ​water that has ​the 1000 ppm ​TDS level? The ​level of TDS ​needs to be ​lowered down ​to 200 ppm.​ Which method ​is more viable ​for this ​process, ​Electrodialysis ​Reversal (EDR) ​or Reverse ​Osmosis (RO)? ​ Share your ​points of view ​and please give ​some examples. ​