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 81 miles •
View from the Netherlands Carillon Looking East
Ozone (O3) at McMillan NCORE Monitoring Site 
updated 10/21/2014 12:00 PM ST

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 15 ppb 27 ppb   33 ppb  
1-hour average 33 ppb 33 ppb   37 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 10/21/2014 12:00 PM ST

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 7.1 μg/m3 8 μg/m3
1-hour average 5.0 μg/m3 16 μg/m3  23 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  69 F 
Yesterday's minimum temperature  48 F 
Yesterday's maximum temperature  68 F 
Current relative humidity  48 % 
Yesterday's minimum relative humidity  48 % 
Yesterday's maximum relative humidity  89 % 


Visibility at NPS Park Police Headquarters Monitoring Site
updated 10/21/2014 12:00 PM ST

Approximate Visual Range
Current Yesterday's
Maximum
Yesterday's
Minimum
  81 miles 127 miles 41 miles


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Current Air Quality »
at McMillan NCORE
Ozone - O3
updated 10/21/2014 12:00 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 5.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 10/21/2014 12:00 PM ST

at Park Police Headquarters
Visual Range
81 miles

updated 10/21/2014 12:00 PM ST
  • See more air data »
  • Current Weather »
    at Park Police Headquarters

    Temperature
    69 F

    Humidity
    48 %

    Wind
    SSE-2 mph

  • See more weather data »
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    Last Updated: October 21, 2014