Madzi oyeretsedwa amatanthauza H2O opanda zonyansa, omwe ndi madzi oyera kapena madzi oyera mwachidule.Ndi madzi oyera ndi oyera opanda zonyansa kapena mabakiteriya.Amapangidwa ndi madzi omwe amakwaniritsa ukhondo wamadzi akumwa a m'nyumba pogwiritsa ntchito njira yaiwisi ya electrodialyzer, njira ya ion exchanger, reverse osmosis njira, njira ya distillation, ndi njira zina zoyenera kukonza.Mukhoza kumwa mwachindunji.
M'zaka zaposachedwa, ndikusintha mosalekeza kwa chikhalidwe cha anthu, moyo, ndi kuchuluka kwa momwe amadyera, anthu asintha kuchoka pa zofunika pa moyo monga chakudya ndi zovala ndikuyamba kufunafuna zinthu zachilengedwe komanso zathanzi komanso moyo.Kwa madzi akumwa ofunikira m'miyoyo ya anthu, machitidwe ake ndi odziwikiratu.Pakalipano, gawo lamsika lamadzi akumwa muzakudya ndi zakumwa zafika 40%.Pakati pawo, madzi oyeretsedwa amakhala oposa 1/3.Choncho, njira yonse yopangira madzi oyera iyenera kuyang'aniridwa ndi kuyang'aniridwa mu nthawi yeniyeni kuti zitsimikizire kuti madzi oyera omwe amaikidwa pamsika ndi zinthu zoyera, zoyera komanso zoyenerera zomwe zimagwirizana ndi malamulo ndi malamulo oyenerera.
Chifukwa cha kuchepa kwa madzi oyera, ma electromagnetic flowmeter wamba sangathe kuyeza.
Kuphatikiza pa ma electromagnetic flowmeters omwe amagwiritsidwa ntchito kwambiri, Sinomeasure imatha kupereka ma turbine okwera okwera kapena ma ultrasonic flowmeters popanda kusweka kwa chitoliro malinga ndi zosowa zamakasitomala zoyezera madzi oyera.