Ken Ward Jr. of the Charleston Gazette used EPA data and records to show that a chlorine-producing plant in Natrium is West Virginia's single-largest air polluter, emitting more than 1,200 pounds of mercury into the air every year. Although much of the focus on mercury pollution centers on coal plants, chlorine producers are responsible for more mercury emissions. "Nationally, the average coal-fired power plant reported 84 pounds of mercury emissions in 2003. The average chlorine plant reported more than 1,074 pounds. Of the 100 power plants with the most mercury emissions, the average total air discharges was 484 pounds - less than half the average from a chlorine plant."