&EPA
United States
Environmental Protection
Agency
             EPA is Proposing to Monitor NO2 Concentrations Near Roads
                                       in 142 Urban Areas
                                                                      ^^^
                                                                       Not shown on map
                                                                        Anchorage, Alaska
                                                                        Honolulu, Hawaii
                                                                       • San Juan, Puerto Rico
   Proposed Minimum Near-Road NO2 Monitoring Requirements
  ^119 areas would require 1 monitor
     (> 350,000 population)

  <0> 23 areas would require 2 monitors
     (> 2.5 million population or
     road segments with annual average daily traffic counts > 250,000 vehicles)

     165 total monitors

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&EPA
United States
Environmental Protection
Agency
         EPA is Proposing to Monitor NO2 Concentrations Community-Wide
                                      in 52  Urban Areas
                                                                               Not shown on map
                                                                               * San Juan, Puerto Rico
                                                                               • Honolulu, Hawaii
   Proposed Minimum Community-wide NO2 Monitoring Requirements
  <0> 52 areas would require 1 monitor
     (> 1 million population)

   • 418 existing NO2 monitoring sites in 2008
     Many of these sites would satisfy the proposed community-wide monitoring
     requirements.

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