1. Pesticides and herbicides
2. Fluoride
3. Chlorine
4. Arsenic
5. Hydrogen Sulfide
6. Pharmaceuticals from Ampicillin to Zyrtec
7. Copper
8. Lead
9. Algae
10. Slats such as Magnesium or Sodium Sulfate
THIRSTY? I would recommend a water filter or drink clean bottled water.