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Washington records world’s worst air quality for a city after 850,000 Fourth of July fireworks
The Guardian • • nation
Key Points:
- Washington DC experienced “unhealthy” air quality for hours following a 40-minute Independence Day fireworks show, with particulate matter levels peaking at 6.7 times pre-fireworks concentrations and some areas reaching EPA-defined unhealthy levels for sensitive groups.
- The fireworks display, organized by the Trump-backed Freedom 250 and involving over 850,000 shells, caused DC to briefly have the worst air quality of any major city globally, exacerbated by an ongoing heatwave and meteorological conditions trapping smoke.
- Air quality peaked about five hours after the event ended and remained elevated for several hours, prompting a Code Red alert advising vulnerable populations to limit outdoor exposure.
- Experts noted that air pollution likely spread to nearby Arlington, Virginia, highlighting the need for expanded real-time air quality monitoring to detect such events beyond city limits.
- Despite the severe pollution spike, thunderstorms on Sunday evening helped prevent even worse air quality outcomes; the White House defended the event, stating such short-term air quality impacts are common during Fourth of July fireworks nationwide.
