Washington Air Quality Suffers After July 4th Fireworks

Washington D.C. experienced the world's worst air quality for a major city on July 4th, following a 40-minute fireworks display over the National Mall. Hourly concentrations of particulate matter rose to 6.7 times their pre-fireworks levels, leading to "unhealthy" air for residents for several hours after the event. This significant air pollution event occurred as the Trump administration has been rolling back pollution controls. The fireworks display, described by the president as "spectacular," contributed to the drastic decline in air quality, highlighting the immediate environmental impact of such large-scale pyrotechnic events. The analysis of particulate matter concentrations provides concrete data on the severity of the air pollution experienced in the capital.