1. PURE AND IMPURE WATER B.12

2. Do you drink chemically pure H 2 O? What is the difference between chemically pure versus “clean” H 2 O?

3. Clean H 2 O H 2 O that is free from microorganisms that cause disease Atmospheric gases like N 2 O 2 CO 2 always dissolve in H 2 O to some extent

4. CLEAN H 2 O Some dissolved gases and minerals give H 2 O a pleasing taste

5. HARMFUL SUBSTANCES Fe gives H 2 O a bad taste and causes unwanted deposits in pipes and fixtures S gives H 2 O a bad odor

6. HARMFUL SUBSTANCES Hg, Cd, Pb, and As, can dissolve in H 2 O and are harmful to human health Pesticides and chemical waste also enter drinking H 2 O

7. CHEMICALLY PURE H 2 O Only H 2 O… without anything else does not exist.