Welcome to the Penn State Air Quality Forecast Office (PSAQFO)

The meteorologists at the Penn State Air Quality Forecast Office (PSAQFO) provide daily air quality forecasts for the Philadelphia metropolitan area and the State of Delaware.  We forecast fine particulate matter (PM2.5) year-round and ozone (O3) from May 1 to September 30.  During the height of the summer air quality season, we also provide a daily 5-day medium range air quality forecast discussion for the Mid-Atlantic region.

Our blog posts focus on the challenges and successes of forecasting O3 and PM2.5 air quality in the Mid-Atlantic region.  This website also includes a list of the forecasting resources – numerical modeling guidance, tools, and information – we use to develop our forecasts for the Mid-Atlantic region.

Please leave a comment on our blog – click on an individual post and scroll down to the bottom of the entry to find a form to leave your comment.  Also feel free to contact us for more information on our forecasting program!

And check out our updated Glossary of commonly used terms as well as the list of Forecasting Resources!


Find our air quality forecasts on these websites:


Funding for the Philadelphia air quality forecasts is provided by the Delaware Valley Regional Planning Commission (DVRPC) and the Pennsylvania Department of Environmental Protection (DEP).

Funding for the State of Delaware air quality forecasts is provided by the Delaware Department of Natural Resources and Environmental Control (DNREC).