PM2.5 Monitoring Site

Monitoring v4 Site

This is a tool that aggregates monitoring data for fine particulate matter (PM2.5) from a number of sources.

The site is designed to allow data from the past 10 days to be accessed and visualized quickly. More functionality can be found in the PWFSL R Smoke Package.


Tools are provided for research purposes only, and may not accurately reflect what happened due to numerous reasons. Data are provisional; obtain data from original sources for official purposes. Use at own risk.

Tool Links

Stable URL:

Current Version:

    • version 4 (current, introduced in April 2018)

Past Versions:

    • version 3 (deprecated) (2016-2017)

    • version 2 (no longer available)

    • version 1 (no longer available)

Version History


This tool works best under Google Chrome. Internet Explorer / Edge browsers in particular may have issues and features are not guaranteed to work.

Known Issues / Current Development

Work in Progress:

      • Present diagraph timeseries across timezones in Data Report.

      • Additional graphic coming

      • Addition of statistical model coming


Air Resource Advisors should post questions / issues to the WFAQRP > #monitoring-v4-site channel.

External inquiries may be directed to Dr. Sim Larkin, USFS-AirFire, larkin (at)


The Monitoring Site is a tool developed by the USFS AirFire Team in conjunction with Mazama Science and the University of Washington's School of Environmental and Forestry Sciences (UW SEFS).

Original design and concept:

    • Original Concept and Project Lead: Sim Larkin, USFS AirFire

    • Lead Developer: Mazama Science

      • Jonathan Callahan (Contact), Helen Miller

    • Additional Development

      • Supporting Database, Compatibility, and Other Capabilities: Joel Dubowy, UW SEFS and David Askov, UW SEFS

Funding for the Monitoring Site is provided by the USFS, National Fire Plan, and DOI.

U.S. Forest Service logo
Mazama Science Inc logo
University of Washington logo