This standard covers health claims such as lead, VOCﾕs, pesticides, herbicides and cysts.

A well designed high quality carbon blocks meet NSF 53 standards.Carbon Block filters are densely packed fine activated carbon powder with special polymeric binder. Carbon blocks are engineered with additives to remove certain heavy metal.

The microporous structure traps particles and cysts. The fine activated carbon powder gives faster adsorption kinetics. The adsorption efficiency is increased many folds by minimizing the bulk water and boundary layer so that the molecules of the contaminates can diffuse fast into the inner pores of the carbon.