<prompt> Normal fluoride level in water:2.0 mg10.5 mg11.5 mg12.5 mg1  <response>: Ref: 21st edition Park, pg 577 pg 668Explanation:The major source of fluorine to man is drinking water.In most parts of India the fluoride content of drinking water is about 0.5 mgL.The recommended maximum limit of concentration of fluoride is 1.5 mglitre. 