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 112 miles •
View from the Netherlands Carillon Looking East
Ozone (O3) at McMillan NCORE Monitoring Site 
updated 04/27/2015 09:00 PM ST

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 39 ppb 40 ppb   44 ppb  
1-hour average 34 ppb 44 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 04/27/2015 09:00 PM ST

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 5.3 μg/m3 6.5 μg/m3
1-hour average 6.0 μg/m3 10.0 μg/m3  16.0 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  updated 04/27/2015 10:00 PM ST

Current temperature  54 F 
Yesterday's minimum temperature  46 F 
Yesterday's maximum temperature  69 F 
Current relative humidity  62 % 
Yesterday's minimum relative humidity  24 % 
Yesterday's maximum relative humidity  88 % 


Visibility at NPS Park Police Headquarters Monitoring Site
updated 04/27/2015 10:00 PM ST

Approximate Visual Range
Current Yesterday's
Maximum
Yesterday's
Minimum
  112 miles 226 miles 17 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 04/27/2015 09:00 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 6.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 04/27/2015 09:00 PM ST

at Park Police Headquarters
Visual Range
112 miles

updated 04/27/2015 10:00 PM ST
  • See more air data »
  • Current Weather »
    at Park Police Headquarters
    updated 04/27/2015 10:00 PM ST
    Temperature
    54 F

    Humidity
    62 %

    Wind
    NW-6 mph

  • See more weather data »
  • Feature »
    feature podcast

    Last Updated: April 27, 2015