I loko o ke kaʻina hana meaʻai a me nā mea inu, pono e hana ʻia ka nui o ka wai wai, me ka wai, ka wai berry, nā huahana dairy, ka waiʻona, a me nā mea ʻē aʻe.Loaʻa pinepine ʻia nā mea paʻa paʻa, sediment, a me nā micro-organisms i loko o ka wai kumu.Inā ʻaʻole i hoʻokō piha ʻia ka kānana kūpono, e hoʻopilikia ia i ka maikaʻi a me ka ʻono o nā huahana.Hiki i nā mea kānana ke hoʻopau pono i kēia mau haumia a hōʻoia i ka maʻemaʻe a me ka paʻa o nā wai waiwai.