
DC Independence Day Fireworks Trigger World-Record Air-Quality Spike
Washington, DC briefly logged the world’s worst air quality for a major city after an 850,000-shell Independence Day fireworks show, with PM2.5 levels spiking to about 6.7 times pre-fireworks and all city sensors reporting air unhealthy for sensitive groups. The peak occurred around 4am, but thunderstorms helped limit the worst impact. The event, organized byFreedom 250, comes amid broader pollution-control rollbacks championed by the Trump administration.













