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Smoke from record DC fireworks show triggered air-quality alert
Air quality across Washington, northern Virginia, and the surrounding suburbs had returned to the “moderate” range by Monday morning.
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forbes.com
D.C. Facing ‘Code Purple’ Air Quality Following Massive Independence Day Fireworks Display
The Fourth of July fireworks display in the capital impacted the amount of fine particulate matter in the atmosphere.
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cbsnews.com
Air quality alerts in and around D.C. warn of "very unhealthy" pollution levels after July 4th fireworks
A "purple" air quality alert was issued for Washington, D.C., and surrounding areas, meaning pollution reached levels considered "very unhealthy."
