... off 99.99% of bug,95% of toxic metal, 99% of the radionuclide, and 95% of the organic material. 2 Description of RO system: RO ... wipe suspending particles,dust,particles,organic chemicals,unpleasant taste,chlorine of raw water and make sure that the raw water ... Then RO filter can wipe dissolvable substance,bacteria,pesticide ,heavy metal particlea as well as the carcinogen like chloroform,fluorin etc ...