How to remove pathogens from potable water???

Question

in most economical way, in tropical climate??

Answer 1

You could use 2 Iodine tablets or you could put ten drops of chlorine bleach into 1 liter and wait 30 minutes.

Answer 2

If the water is really potable there should not be any pathogens in it.
Hence the definition-->potable

Answer 3

First u boil it for 15 min. and then we had something that would filter out all the dead material. Very similar is the cooking of foods . Cook your meats and veg. till well done and if there is ameba's they are ok to if they are well done.