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 75 miles • updated 02/28/2015 09:45 PM EST
View from the Netherlands Carillon Looking East
Ozone (O3) at McMillan NCORE Monitoring Site 
updated 02/28/2015 08:00 PM EST

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 30 ppb 34 ppb   32 ppb  
1-hour average 17 ppb 36 ppb   35 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 02/28/2015 08:00 PM EST

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 11.9 μg/m3 17.7 μg/m3
1-hour average 16.0 μg/m3 17.0 μg/m3  33.0 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 02/28/2015 09:00 PM EST

Current temperature  28 F 
Yesterday's minimum temperature  25 F 
Yesterday's maximum temperature  35 F 
Current relative humidity  47 % 
Yesterday's minimum relative humidity  34 % 
Yesterday's maximum relative humidity  71 % 


Visibility at NPS Park Police Headquarters Monitoring Site
updated 02/28/2015 09:00 PM EST

Approximate Visual Range
Current Yesterday's
Maximum
Yesterday's
Minimum
  75 miles 121 miles 20 miles


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Current Air Quality »
at McMillan NCORE
Ozone - O3
updated 02/28/2015 08:00 PM EST
Ozone concentration is ***O3*** parts per billion air quality index (AQI) for Ozone and Particulate Matter from good to unhealthy PM 2.5 is 16.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 02/28/2015 08:00 PM EST

at Park Police Headquarters
Visual Range
75 miles

updated 02/28/2015 09:00 PM EST
  • See more air data »
  • Current Weather »
    at Park Police Headquarters
    updated 02/28/2015 09:00 PM EST
    Temperature
    28 F

    Humidity
    47 %

    Wind
    SE-1 mph

  • See more weather data »
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    Last Updated: February 28, 2015