Himalayan Water Purifier and Home Appliances

We need for our country, a system of water purification by reverse osmosis that meets the standards of WHO, Stanag and nato, to put water available to isolated populations affected by area Sahelian, equatorial, tropical, etc..
  from sea water, river water, polluted water, healthy or polluted water tables.
for areas with populations of 100 to 50 000 peoples.