Washington records world’s worst air quality for a city after 850,000 Fourth of July fireworks

Hourly concentrations of particulate matter rose to 6.7 times their pre-fireworks levels, according to an analysis Washington DC residents breathed in “unhealthy” air for hours after a 40-minute Independence Day fireworks show over the National Mall on Saturday night, with the country’s capital…

First covered Jul 7, 2026 · 8:00 AM PT · 1 article

Coverage

1d Guardian Environment Washington records world’s worst air quality for a city after 850,000 Fourth of July fireworks — Hourly concentrations of particulate matter rose to 6.7 times their pre-fireworks levels, according to an analysis Washington DC residents breathed in…

Primary sources

epa.gov Patient Exposure and the Air Quality Index | US EPA

More coverage from around the web

forbes.com D.C. Facing ‘Code Purple’ Air Quality Following Massive Independence Day Fireworks Display

wusa9.com DC's air quality returns to moderate as haze from America 250 fireworks begins to clear

wtop.com DC area under heat and severe weather alerts as storms hit the region - WTOP News

washingtonpost.com Fireworks on Mall likely to cause hazardous air pollution, documents show - The Washington Post

clarity.io New Report Finds July 4 Fireworks Contributed to Elevated Air Pollution Across Washington, D.C.

Appeared in: 2026-07-08 (#12)

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