Kumashishini okucoca amanzi, iimveliso zokucoca zisetyenziswa ngokubanzi ekususeni amasuntswana amisiweyo, intlenga, izinto eziphilayo, iikhemikhali, kunye ne-microorganisms emanzini, ukuphucula ukungafihli, i-turbidity, ivumba kunye nencasa.
Sinokubonelela ngezi mveliso zilandelayo zokuhluza ezihambelanayo kushishino lonyango lwaManzi.
