Indlela Yesihlungi Se-Membrane (MF) iyindlela ephumelelayo neyamukelekayo yokuhlola amasampula oketshezi ukuze kutholakale ukungcoliswa kwe-microbiological. Le ndlela yethulwa ngasekupheleni kwawo-1950 njengenye indlela yenqubo yeNombolo Engenzeka Kakhulu (MPN) yokuhlaziywa kwe-microbiological yamasampuli amanzi.