2002 Estimated County • Average Ambient Air Concentration -New England- Carbon Tetrachloride Distribution of U.S. Ambient Air Concentration (micrograms per cubic meter) Carbon Tetrachloride ug/m3 0.62-0.70 I I 0.61 0.31 -0.60 Miles Souh: U.S. EPA/ OAQPS 2002 NATA Final. EPA Region 1- CIS Center Map Tracker ID= 6208 vxEPA ------- |