15 October 2025. Extra as regards to wind.
Although Pittsburgh’s air has improved for the reason that Smoky Metropolis days, we nonetheless have heavy business and unhealthy air too often. The rotten egg odor of sulfur lingers when there’s a temperature inversion, and since Pittsburgh averages 157 inversion days per yr it’s seemingly there’s dangerous air someplace right here virtually half the time. However not everybody smells it. It depends upon the place the plume goes, and that depends upon the floor wind or lack thereof.
After CMU’s CREATE Lab printed the SmellPGH app in 2016 for crowd-sourced dangerous air studies, they went on to develop the PlumePGH web site in 2021 that reveals the place the dangerous air goes. I discovered about PlumePGH in a Public Supply article final week.
This two minute video explains the way it works displaying air actions on 10 December 2020. Again then the Cheswick energy plant (orange plume) was nonetheless in operation; it closed on 31 March 2022.
To whet your urge for food for the PlumePGH web site, listed below are nonetheless photographs from a latest dangerous air day on Saturday 4 October 2025. A screenshot of the SmellPGH map on 4 October reveals that the air was actually terrible and lots of people seen it.
Chosen screenshots from PlumePGH on the identical day reveals 3 plumes. U.S. Metal’s …
- Clairton Coke Works (Clairton PA) in purple
- Irvin Works (West Mifflin PA) in yellow
- Edgar Thomson Works (Braddock PA) in blue-green.
At 3:48am the wind was from the south. All 3 plumes intermingled as they headed north.
Round midday the wind died and lots of people have been sad within the river valleys.
At 5:35pm the wind picked up out of the southeast and an entire new set of parents smelled rotten eggs.
Click on this hyperlink to see the entire Plume PGH timelapse video for 2025-10-04.
Go to the PlumePGH web site for extra data.
