For more information about National Park Service air resources, please visit http://www.nature.nps.gov/air/.


National Mall & Memorial Parks

  • View from the Netherlands Carillon
    Looking East
  • Air Data
    & Weather
  • NPS Air
    Webcams
Visual Range is about 70 miles •
View from the Netherlands Carillon Looking East
Ozone (O3) at McMillan NCORE Monitoring Site 
updated 04/18/2014 08:00 PM ST

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 38 ppb 42 ppb   45 ppb  
1-hour average 38 ppb 41 ppb   47 ppb  

*Ozone (O3) is measured in parts per billion (ppb)



AQI Ozone

*The McMillan NCORE monitoring site is operated by the
District of Columbia Department of the Environment.




Particulate Matter (PM2.5) at McMillan NCORE Monitoring Site 
updated 04/18/2014 08:00 PM ST

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 9.5 μg/m3 9.4 μg/m3
1-hour average 9.0 μg/m3 13 μg/m3  17 μg/m3

*Particulate Matter (PM2.5) is measured in micrograms per cubic meter (μg/m3)



Particulate Matter (PM2.5)

*The McMillan NCORE monitoring site is operated by the
District of Columbia Department of the Environment.




Weather at NPS Park Police Headquarters Monitoring Site 

Current temperature  52 F 
Yesterday's minimum temperature  41 F 
Yesterday's maximum temperature  58 F 
Current relative humidity  55 % 
Yesterday's minimum relative humidity  40 % 
Yesterday's maximum relative humidity  70 % 


Visibility at NPS Park Police Headquarters Monitoring Site
updated 04/18/2014 08:00 PM ST

Approximate Visual Range
Current Yesterday's
Maximum
Yesterday's
Minimum
  70 miles 107 miles 58 miles


map Grand Teton National Park Web CameraGreat Smoky Mountains National Park Web Camera Home Shenandoah National Park Web Camera Hawaii Volcanoes National Park Web Camera Big Bend National Park Web Camera Joshua Tree National Park Web Camera Grand Canyon National Park Web Camera Theodore Roosevelt National Park Web Camera Washington, D.C. Web Camera Acadia National Park Web Camera Mammoth Cave National Park Web Camera Great Smoky Mountains National Park, Purchase Knob Web Camera Great Smoky Mountains National Park, Look Rock Web Camera North Cascades National Park Web Camera Olympic National Park Web Camera Mount Rainier National Park Web Camera Sequoia/Kings Canyon National Park Web Camera Yosemite National Park Web Camera Denali National Park & Preserve Web Camera Point Reyes National Seashore Web Camera
Current Air Quality »
at McMillan NCORE
Ozone - O3
updated 04/18/2014 08:00 PM ST
Ozone concentration is ***O3*** parts per billion air quality index (AQI) for Ozone and Particulate Matter from good to unhealthy PM 2.5 is 9.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 04/18/2014 08:00 PM ST

at Park Police Headquarters
Visual Range
70 miles

updated 04/18/2014 08:00 PM ST
  • See more air data »
  • Current Weather »
    at Park Police Headquarters

    Temperature
    52 F

    Humidity
    55 %

    Wind
    SE-2 mph

  • See more weather data »
  • Feature »
    feature podcast

    Last Updated: April 18, 2014