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Fireworks on Mall likely to cause hazardous air pollution, documents show

Internal Park Service modeling says the 850,000-firework show could push PM2.5 to 1,200 micrograms per cubic meter and prompt N95 mask advice.

  • Internal National Park Service documents warn that July Fourth fireworks on the National Mall will generate hazardous PM2.5 levels, with projections of 600 to 1,200 micrograms per cubic meter in expected scenarios and exceeding 2,000 in worst-case conditions.
  • Organizers billed the 40-minute display as the largest pyrotechnic show in history, featuring 850,000 fireworks along the Potomac River, with President Donald Trump scheduled to speak at the 250th anniversary celebration.
  • New York University professor George Thurston warned that fireworks contain hazardous metals like copper, while the Park Service advises people to "wear an n95 mask when outdoors" and remain indoors during and after the show.
  • Launch sites near Southeast Washington, a predominantly Black and lower-income area, raise concerns about health disparities, as Thurston stated existing respiratory and cardiovascular issues in these communities should not be ignored.
  • The Interior Department and the Park Service did not respond to inquiries regarding pollution risks, while experts note that research on the specific health effects of fireworks-related pollution remains limited.
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More than 850,000 firecrackers will be launched for forty minutes on July 4th in Washington, D.C., while a wave of heat will sink on the east coast of the country, preventing smoke and pollution from dissipating. A risk to water, heart and lungs.

·Paris, France
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The spokesman-Review broke the news in Spokane, United States on Wednesday, July 1, 2026.
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