Madzi ndi moyo gwero, ndi thupi la munthu yachibadwa kagayidwe zofunika zakuthupi.Pofuna kuonetsetsa chitetezo cha madzi ofunikira, dziko la China linapanga ndikulengeza za Sanitarv Standard for Drinking Water kuyambira 2007 (GB5749-2006).Kunena zoona, anthu akamayamba kugwiritsira ntchito madzi, n’kovuta kuti akhale ndi thanzi labwino.Pofuna kuteteza thanzi la thupi ndikuwonetsetsa kuti moyo ukhale wabwino, kusefera kwa zinthu zosiyanasiyana (zakuthupi, zamankhwala ndi zachilengedwe) zimakhudza.
Madzi abwino komanso otetezeka nthawi zonse amafunikira pamoyo watsiku ndi tsiku.Dali meltblown ndi carbon rod sefa zinthu zotsimikiziridwa ndi NSF zimagwiritsidwa ntchito kwambiri pochiza madzi akumwa.