2002 Estimated County
Average Ambient Air Concentration
            -New England-
              Naphthalene

                VT
                     MA
                                                        Distribution of U.S.
                                                     Ambient Air Concentration
                                                    (micrograms per cubic meter)
                                                            Naphthalene
                                                U.S. Highest too

                                                         95
                                                 Percentile
                                                         50
                                                         25
                                              Lowest in the U.S. 0
  ug/m

0.060-0.53
0.042-0.059
0.023-0.041
0.013-0.022
0.0061 -0.012
0.000035 - 0.0060
                                                            0  10 20  30 40  50
                                                                        I Miles
                  Source: U.S. EPA/ OAQPS 2002 NATA. EPA Region 1- CIS Center Map Tracker ID= 4993

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