DC air stayed in the 'unhealthy' range for hours after Independence Day fireworks
TL;DR
Air quality in Washington, D.C. stayed unhealthy for more than 10 hours after a 40-minute Independence Day fireworks show over the National Mall, with PM2.5 peaking at 212.8 µg/m³ in the Navy Yard at 3 a.m. The pollution lingered near the ground and persisted into late morning and early afternoon, according to AirNow data from the EPA.
- See how bad the air quality in D.C. really got after the Freedom 250 fireworks The Washington Post
- DC fireworks show led to ‘Code Red’ air quality alert around nation’s capital KRON4
- D.C. suffers from a July 4 hangover after 250 extravaganza Axios
- Bombs Bursting in Air Means Hours of Smoke and Confused Dogs in D.C. The New York Times
- Code Purple Air Quality Alert for DC and Northern Virginia Sunday WUSA9
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