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2. Barium, kadar maksimum 1,5 mg/l
3. Cadmium, kadar maksimum 0,01 mg/l
4. Chromium, kadar maksimum 0,05 mg/l
5. Lead (timah hitam), kadar maksimum 0,05 mg/l
6. Mercury, kadar maksimum 0,002 mg/l
7. Nitrat, kadar maksimum 10 mg/l.
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