Ad tfehmem azal n TDS n tḥebsa n tḥebsiwt n tneqqel n tmeddurt, yernu i tḥeqqen aɣef-nnes yesɛan ameqran deg wamlalen n ttemḍawin, seg ttesdawin n tnaɣen ɣer uɣel. Yiwen seg yimsaɣen ay iɛeddan n waman d aɣef n tmeddurt n tmerwin n tmerwin n tmerwin n tmerwin n waman. Deg unagrawen n osmosis n tmerwin (RO), yesɛa tḥebsa n TDS n tḥebsa n tmeṭṭut n tmeṭṭut n tmeṭṭut n tmeṭṭut n tmeɣli.