2002 Estimated County
Average Ambient Air Concentration
            -New England-
   Polycyclic Organic Matter (POM)
                                                         Distribution of U.S.
                                                      Ambient Air Concentration
                                                    (micrograms per cubic meter)
                                                                 POM
                                                 U.S. Highest too

                                                          95
                                                  Percentile
                                                          50
                                                          25
                                               Lowest in the U.S. °
 ug/m3

0.034-0.73
0.017-0.033
0.0092-0.016
0.0052-0.0091
0.0024-0.0051
0.000035 - 0.0023

Interstate

 N
                                                            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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