Story by Katie Byrd • 10m K ANSAS CITY, Mo. (KCTV) - While all parents need to think about water safety, some should take extra precautions this summer while at the pool.

The CDC recommendation for water fluoridation levels is 0.7 mg/L, while potential harms are not observed until water levels exceed 1.5 mg/L. Some areas in China have natural levels as high as 11.8 ...