For more information about National Park Service air resources, please visit http://www.nature.nps.gov/air/.
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View from the Netherlands Carillon
Looking East - Air Data
& Weather - NPS Air
Webcams
Visual Range is about 28 miles • updated 02/15/2013 12:00 AM EST
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Ozone (O3) at McMillan NCORE Monitoring Site
updated 02/14/2013 10:00 PM EST
updated 02/14/2013 10:00 PM EST
O3 concentration | Current | Today's Maximum |
Yesterday's Maximum |
---|---|---|---|
8-hour average | 27 ppb | 33 ppb | 22 ppb |
1-hour average | 0 ppb | 38 ppb | 26 ppb |
*Ozone (O3) is measured in parts per billion (ppb)
*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 02/14/2013 10:00 PM EST
updated 02/14/2013 10:00 PM EST
PM2.5 concentration |
Current | Today's Maximum |
Yesterday's Maximum |
---|---|---|---|
24-hour average | 17.9 μg/m3 | — | 16 μg/m3 |
1-hour average | 18.0 μg/m3 | 29 μg/m3 | 25 μg/m3 |
*Particulate Matter (PM2.5) is measured in micrograms per cubic meter (μg/m3)
*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 02/15/2013 12:00 AM EST
Current temperature | 42 F |
Yesterday's minimum temperature | 37 F |
Yesterday's maximum temperature | 49 F |
Current relative humidity | 73 % |
Yesterday's minimum relative humidity | 49 % |
Yesterday's maximum relative humidity | 92 % |
Visibility at NPS Park Police Headquarters Monitoring Site
updated 02/15/2013 12:00 AM EST
updated 02/15/2013 12:00 AM EST
Approximate Visual Range |
Current | Yesterday's Maximum |
Yesterday's Minimum |
---|---|---|---|
28 miles | 56 miles | 8 miles |
Current Air Quality »
at McMillan NCORE
Ozone - O3
updated 02/14/2013 10:00 PM EST
Ozone - O3
updated 02/14/2013 10:00 PM EST
Particulate Matter - PM2.5
updated 02/14/2013 10:00 PM EST
at Park Police Headquarters
updated 02/15/2013 12:00 AM ESTSee more air data »
updated 02/14/2013 10:00 PM EST
at Park Police Headquarters
Visual Range
28 miles
updated 02/15/2013 12:00 AM EST
Current Weather »
at Park Police Headquarters
updated 02/15/2013 12:00 AM EST
updated 02/15/2013 12:00 AM EST
Temperature
42 F
Humidity
73 %
Wind
SSE-3 mph
About
Air Pollution »
In Depth »
Last Updated: February 14, 2013