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- D.C. Facing ‘Code Purple’ Air Quality Following Massive Independence Day Fireworks Display Forbes
- Code Purple Air Quality Alert for DC and Northern Virginia Sunday WUSA9
- Air quality alert issued for DC area after July 4 fireworks NBC4 Washington
- Bombs Bursting in Air Means Hours of Smoke and Confused Dogs in D.C. The New York Times
- Fireworks on Mall likely to cause hazardous air pollution, documents show The Washington Post