Cov qauv dej haus zoo piav qhia txog qhov tsis zoo rau cov dej haus. Txawm hais tias muaj tseeb tias txhua tus tib neeg hauv ntiaj teb no xav tau cov dej haus kom muaj sia nyob thiab cov dej ntawd yuav muaj ntau yam teeb meem, tsis muaj kev lees paub thiab lees paub thoob ntiaj teb cov qauv rau cov dej haus.
Leej twg teev cov qauv dej haus?
EPA tau teeb tsa cov qauv rau ntau tshaj 90 cov kab mob sib kis tau tsim ua rau 6 pawg: kab mob, tshuaj tua kab mob, tshuaj tua kab mob, tshuaj inorganic, tshuaj organic thiab radionuclides.
Leej twg TDS cov lus qhia rau haus dej?
Raws li World He alth Organization, TDS qib tsawg dua 300 mg / liter yog suav tias yog qhov zoo tshaj plaws, ntawm 300 txog 600 mg / liter yog qhov zoo, 600-900 yog ncaj ncees, 900 - 1200 yog qhov tsis zoo thiab TDS qib ntau dua 1200 mg / liter yog qhov tsim nyog.
Drinking water standards
