Carbon Material are most effective at removing chlorine, sediment, volatile organic compounds (VOCs), taste and odor from water.
Chlorine (If water containing organic material, is easy and chlorine combine to formtrihalomethanes and other toxic chloride, which is a deadly carcinogen.)
Amino acids, proteins (Like rancid water and oil, easy to carcinogenic)
Insect repellents, herbicides, pesticides, rodenticides, organophosphoruspesticides (Often caused by poisoning, hepatitis, nausea, abdominal pain, while long-term exposure may cause various types of cancer)