Air Now Comprehensive air pollution site.
PM2.5 Purple Air network based on low cost air quality sensors.
Zoom out to see other places around the world.
Downloadable data includes atmospheric pressure as well. (Requires Python. Modifiable example gives pressure and PM2.5 for the day and time of the Tongan explosion, 2022 January 15th).
Black carbon and PM2.5 from the top of the Physics building at UNR.
Updates every 2 minutes.
Archived images available.
Scroll down to see record values over the years.