For more information about National Park Service air resources, please visit http://www.nature.nps.gov/air/.


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Ozone (O3) at McMillan NCORE Monitoring Site 
updated 04/21/2015 08:00 AM ST

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 40 ppb 43 ppb   41 ppb  
1-hour average 35 ppb 49 ppb   48 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 04/21/2015 08:00 AM ST

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 5.5 μg/m3 4.4 μg/m3
1-hour average 5.0 μg/m3 7.0 μg/m3  8.0 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 04/21/2015 09:00 AM ST

Current temperature  unavailable  
Yesterday's minimum temperature  unavailable 
Yesterday's maximum temperature  unavailable 
Current relative humidity  unavailable  
Yesterday's minimum relative humidity  unavailable 
Yesterday's maximum relative humidity  unavailable 


Visibility at NPS Park Police Headquarters Monitoring Site

Approximate Visual Range
Current Yesterday's
Maximum
Yesterday's
Minimum
  unavailable unavailable unavailable


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Current Air Quality »
at McMillan NCORE
Ozone - O3
updated 04/21/2015 08:00 AM 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 04/21/2015 08:00 AM ST

at Park Police Headquarters
Visual Range
unavailable

  • See more air data »
  • Current Weather »
    at Park Police Headquarters
    updated 04/21/2015 09:00 AM ST
    Temperature
    unavailable

    Humidity
    unavailable

    Wind
    - unavailable

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    Last Updated: April 21, 2015