If fluoride concentration of community water is___________ppm, no need of any flouride supplement at any stage.

Supplemental fluoride depends on the age of child and F- level in water. Below 4 years, fluoridated dentifrices are not recommended Below 2 years, F- tablets are not recommended. Below 6 years, F- mouthwash is not recommended. If F- concentration of community water is >0.7 ppm, no need of any F- supplement at any age. Essentials of preventive and community dentistry  Soben Peter  5th edition