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


Ozone Health Advisory Program Summaries

2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004

2004 Ozone Health Advisory Program Summary

National Park Service Area*

Number of Days
8-hr Ozone
Average > 84 ppb

Number of Days Ozone Health Advisory Issued

Acadia NP 0 0
Great Smoky Mtns NP 3 0
Joshua Tree NP 31 13
Mammoth Cave NP 0 0
Pinnacles NP 0 2
Sequoia & Kings Canyon NPs 72 35
Shenandoah NP 1 0
* This table shows the results for NPS areas participating in the 2004 ozone health advisory program.
† Ozone values above 84 part per billion (ppb) exceed the ozone National Ambient Air Quality Standard of 0.08 part per million (ppm).
‡ Two health advisories were issued based on an advisory forecast. There were two events when the one hour averages were high, but the 8-hour averages never exceeded the 8-hour average ozone standard.

The 8-hour ozone health standard can be exceeded anytime during a 24-hour day time period. Ozone health advisories are initiated during the daylight hours, therefore, the ozone health standard can be exceeded at an area and an ozone health advisory not be issued.


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Last Updated: April 02, 2012