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 124 miles • updated 04/24/2014 02:00 PM DT
View from the Netherlands Carillon Looking East
Ozone (O3) at McMillan NCORE Monitoring Site 
updated 04/24/2014 04:00 PM DT

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 41 ppb 41 ppb   38 ppb  
1-hour average 49 ppb 49 ppb   42 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 04/24/2014 04:00 PM DT

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 5.4 μg/m3 5.6 μg/m3
1-hour average 6.0 μg/m3 11 μg/m3  8 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  67 F 
Yesterday's minimum temperature  50 F 
Yesterday's maximum temperature  60 F 
Current relative humidity  19 % 
Yesterday's minimum relative humidity  41 % 
Yesterday's maximum relative humidity  53 % 


Visibility at NPS Park Police Headquarters Monitoring Site
updated 04/24/2014 04:00 PM DT

Approximate Visual Range
Current Yesterday's
Maximum
Yesterday's
Minimum
  124 miles 113 miles 48 miles


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Current Air Quality »
at McMillan NCORE
Ozone - O3
updated 04/24/2014 04:00 PM DT
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 04/24/2014 04:00 PM DT

at Park Police Headquarters
Visual Range
124 miles

updated 04/24/2014 04:00 PM DT
  • See more air data »
  • Current Weather »
    at Park Police Headquarters

    Temperature
    67 F

    Humidity
    19 %

    Wind
    NW-4 mph

  • See more weather data »
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    Last Updated: April 24, 2014