Barium is just as dangerous to our health as lead, arsenic and mercury and shows up regularly in public water supplies.

Exposure to small amounts of barium, dissolved in water, may cause a person to experience these problems:

1. Breathing difficulties
2. Increased blood pressure
3. Heart rhythm changes
4. Stomach irritation
5. Muscle weakness
6. Alterations in nerve reflexes
7. Damage to your brain, liver, kidney and heart

Barium sprayed in the atmosphere falls to earth and gets in water supplies.

more: http://bariumblues.com/