Mubice byo kuvura amazi, gukuraho ibintu byanduye nka fluoride na chlorine ni ngombwa mu rwego rwo kwemeza umutekano nubwiza bwamazi yo kunywa. Sisitemu ya osmosis (RO) izwiho ubushobozi bwabo bwo kuyungurura neza umwanda utandukanye, kubagira ibice byingenzi mubikorwa byo kuvura amazi yinganda. Fluoride, ikunze kongerwa kubitanga amazi ya komine fu