Calgon Carbon Corporation reported net sales for the second quarter increased sequentially by $12.4 million, or 10.3 percent. Sales for the Activated Carbon and Service segment declined to $121.1 million as compared to $123.6 million for the same period a year ago. Potable water and specialty market sales were higher across all geographic regions. These increases were slightly more than offset by lower sales of powdered activated carbon for treating coal-fired, power-plant mercury emissions in North America, and lower sales to industrial and food-market customers across all geographic regions.