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 29 miles • updated 07/31/2014 11:30 PM EDT
View from the Netherlands Carillon Looking East
Ozone (O3) at McMillan NCORE Monitoring Site 
updated 07/31/2014 10:00 PM EDT

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 56 ppb 57 ppb   53 ppb  
1-hour average 47 ppb 64 ppb   59 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 07/31/2014 10:00 PM EDT

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 14.2 μg/m3 10.1 μg/m3
1-hour average 18.0 μg/m3 18 μg/m3  16 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 07/31/2014 11:00 PM EDT

Current temperature  77 F 
Yesterday's minimum temperature  61 F 
Yesterday's maximum temperature  79 F 
Current relative humidity  73 % 
Yesterday's minimum relative humidity  40 % 
Yesterday's maximum relative humidity  74 % 


Visibility at NPS Park Police Headquarters Monitoring Site
updated 07/31/2014 10:00 PM EDT

Approximate Visual Range
Current Yesterday's
Maximum
Yesterday's
Minimum
  29 miles 97 miles 33 miles


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Current Air Quality »
at McMillan NCORE
Ozone - O3
updated 07/31/2014 10:00 PM EDT
Ozone concentration is ***O3*** parts per billion air quality index (AQI) for Ozone and Particulate Matter from good to unhealthy PM 2.5 is 18.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 07/31/2014 10:00 PM EDT

at Park Police Headquarters
Visual Range
29 miles

updated 07/31/2014 10:00 PM EDT
  • See more air data »
  • Current Weather »
    at Park Police Headquarters
    updated 07/31/2014 11:00 PM EDT
    Temperature
    77 F

    Humidity
    73 %

    Wind
    SSE-2 mph

  • See more weather data »
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    Last Updated: July 31, 2014