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Air Resources 

Our goal is to preserve, protect, enhance, and understand air quality and other resources sensitive to air 

quality in the National Park System

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Air Quality Health

Advisories »

See which national parks have current 

advisories as well as previous years' 

advisory summaries.

Regional Haze SIP 

Review »

State Implementation Plans – 

Department of Interior comment 

letters on draft state plans for 

reducing regional haze.

How is the Air? »

Check out current ozone and weather 

in over 30 national park areas plus 

recent data in a timeline format.

16 Web Cameras in one place!

The new gallery is a quick way to access park specific web sites 

with up-to-date images and air quality data. 

Air Quality in National Parks

The latest NPS air quality report shows visibility, 

ozone, and atmospheric deposition conditions and 

trends for 1999–2008. The report shows 97% of 

parks have stable or improving visibility, 100% 

have stable or improving ozone concentrations, and 

93% have stable or improving trends in 

atmospheric deposition. more »

Visit the gallery of live air quality web cameras

thumbnail images of all 16 NPS air quality webcams

Air quality in 

National 

Parks 9009 

report cover

NEW! » FLAG 2010

The National Park Service, U.S. 

Fish & Wildlife Service, and U.S. 

Forest Service, have revised the 

FLAG Phase I Report which 

provides guidance on assessing 

the impacts of new and existing 

sources of air pollution. more » 

 

 

 

» Ozone regulations under 

review - 

The Environmental Protection 

Agency (EPA) proposed revisions 

to primary and secondary 

standards - NPS comments. 

more » 

» NOx and SO2 regulations 

under revision - 

The Environmental Protection 

Agency (EPA) is conducting a 

combined review of the secondary 

National Ambient Air Quality 

Standards for Nitrogen Oxides 

(NOx) and Sulfur Dioxide (SO2). 

more » archive »

NPS, USFWS, and 

USFS logos

Headlines

Photo of multiple 

stacks of fertilizer 

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National Park Service: Explore Nature» Air Resources Division Page 1 of 2

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DID YOU KNOW? 

The cleaner the air is, the more likely you are to notice a small increase in pollution. Adding just 1 microgram of 

fine particles per cubic meter of air to a clean atmosphere will reduce how far you can see by 30%, from 243 

miles (392 km) to 167 miles (270 km). 

archive » 

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