2002 Estimated County
Average Ambient Air Concentration
            -New England-
              1,3-Butadiene
                                                       Distribution of U.S.
                                                    Ambient Air Concentration
                                                   (micrograms per cubic meter)
                                                           1,3-Butadiene
                                                                ug/m3

                                                               0.11 -0.9

                                                               0.085-0.1

                                                               0.053 - 0.084

                                                               0.035 - 0.052

                                                               0.0056 - 0.034

                                                               0.000035 - 0.0055

                                                               Interstate

                                                                N
U.S. Highest 100

        95
                  Source: U.S. EPA/ OAQPS 2002 NATA. EPA Region 1- CIS Center Map Tracker ID= 4993

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