Iron and manganese filters installed at Camp Pendleton’s 24 Area water treatment plant to lower the levels of excess minerals allowing the water to meet secondary drinking water standards. These standards ensure the content of certain chemicals in the water do not exceed levels that might pose a risk to human health. (U.S. Marine Corps photo by Lance Cpl. Maritza Vela) - Iron and manganese filters installed at Camp Pendleton’s 24 Area water treatment plant to lower the levels of excess minerals allowing the water to meet secondary drinking water standards. These standards ensure the content of certain chemicals in the water do not exceed levels that might pose a risk to human health. (U.S. Marine Corps photo by Lance Cpl. Maritza Vela)