This work aims at preparing AC from olive solid wastes to be used in removal of hazardous substances, such as nitrite ions, from water. Two reported activating agents, namely zinc chloride and phosphoric acid, will be examined here. Neither of such compounds has any serious threat to health or environment as reported in their Material Safety Data Sheets (MSDS). The carbonization step will be performed under inert atmosphere to avoid oxidation (burning) of heated charcoal during carbonization. The AC materials resulting from using the two activating agents will be characterized for comparison purposes. Bench marking with documented commercial activated carbon (CAC) material will be investigated here, in addition to comparison with other reported adsorbents. The material of choice will then be investigated as an adsorbent for nitrite ions from water.