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Continued Advancements in Air Quality Modeling
- By: AWMA
- On: 07/24/2025 10:42:31
- In: EM Articles
- Comments: 0
EM - July 2025: This issue of EM highlights a few of the new and ongoing issues that are being addressed and that may result in new guidance or future changes to the Guideline on Air Quality Models.
by Anthony J. SchroederOn March 21, 2025, the latest revisions to the U.S. Environmental Protection Agency's (EPA) Guideline on Air Quality Models (“Guideline”) became effective capping a multi-year process of planning and regulatory procedures. This guidance document, codified at 40 CFR 51, Appendix W and originally published in 1978, has been modified occasionally over the years as advances have been made in dispersion modeling theory and as new standards have been promulgated that have required the use of new and innovative modeling techniques.
Now, EPA and the modeling community continue to work to identify and address the latest challenges facing air quality modeling. The articles in this issue of EM cover a few of the new and ongoing issues that are being addressed and that may result in new guidance or future changes to the Guideline.
Continue reading the full July 2025 issue of EM.
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