S.No | Fluoride in drinking water (mg/l) Effect | Effects |
1 | 1 mg/l in water | Dental caries reduction |
2 | 2 mg/l in water | Mottled enamel |
3 | 0.002 in air | Injury to vegetation |
4 | 50 mg/l in food or water | Change in thyroid harmone |
5 | 20 - 80 mg/day or more | Crippling skeletal fluorosis |
6 | 8 mg/l in water | 10% osteoporosis |
7 | More than 125 mg/l | Kidney change |
8 | 100 mg/l in water or food | Retardation in growth |
9 | 3.1 - 6 mg/l in water | Osteoporosis |
10 | 2.5 - 5.0 gm in actual dose | Death |