Air Quality Analysis Methods

Collage of three photos showing air quality monitoring in parks.  Clockwise from left: ozone monitoring at Zion NP, Utah; N and S deposition monitoring at Wind Cave NP, South Dakota; and visibility monitoring at Sequoia NP, California.
Air quality is monitored in parks across the country! Shown clockwise from the left are: ozone monitoring at Zion NP, Utah; nitrogen and sulfur deposition monitoring at Wind Cave NP, South Dakota; and visibility monitoring at Sequoia NP, California.

NPS photos

Explore our air quality analysis methods documentation developed in support of the park conditions & trends and national summary pages.

A consistent service-wide approach to evaluating air quality conditions and trends allows the National Park Service Air Resources Division (ARD) to provide specific air quality information for over 350 national park units. In addition, it facilitates annual updates, improving access to timely and relevant air quality information for parks.

Methods Documentation

  • 2017 (pdf, 908 KB)

Legacy Methods Documentation

Last updated: April 4, 2018

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