Washington briefly becomes world's most polluted city, thanks to Trump's Fourth of July fireworks
Washington briefly became the world’s most polluted major city after massive July 4 fireworks went off as part of the Trump administration’s celebrations.
Washington briefly became the world’s most polluted major city after massive Fourth of July fireworks went off as part of the Trump administration’s Freedom 250 celebrations, according to IQAir data.

The fireworks display happened to mark America’s Independence Day. Pyrotecnico, the company hired for the event, had the goal to break the world record by launching around 850,000 fireworks during the 40-minute show.
Large crowds of people gathered at Lower Manhattan and across the city to witness the 50th year of Macy's Fourth of July fireworks and celebrate America's 250th birthday. This year, the fireworks show featured more than 85,000 shells and effects. It also featured a laser and light show for the first time.
Pollution triggered
The fireworks show was delayed by more than an hour due to storm threats. Pollution levels in Washington began to rise during local fireworks displays but increased sharply after the main event began.
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Fine particle pollution, known as PM2.5, reached dangerous levels after the show began. Smoke spread across the city. These tiny particles are dangerous, and can enter deep into the lungs and cause short-term health problems as well as long-term diseases.
One monitoring station recorded PM2.5 levels above 200 micrograms per cubic metre, which is much higher than the US Environmental Protection Agency’s 24-hour limit of 35 micrograms per cubic metre. Air quality alerts classified as Code Purple at the time, and covered large parts of Washington and nearby areas in Virginia and Maryland. Code Purple means the air was very unhealthy.
IQAir data revealed that Washington ranked as the world’s most polluted major city between around 3 am and 5 am on July 5. However, it later dropped in rankings, with cities including Jakarta, Kinshasa and Addis Ababa among the most polluted.
According to scientists, the smoke was cleared and air quality improved, thanks to heavy rain. Russell Dickerson, an atmospheric scientist at the University of Maryland, said that without the rainfall, the situation would have been even worse.
ABOUT THE AUTHORSumanti SenSumanti Sen covers everything that’s happening in the US, from politics to entertainment, but her expertise lies in covering crime news. She has comprehensively chronicled the Idaho student murders, the Laken Riley and Iryna Zarutska cases, and the killing of Charlie Kirk, among other incidents. Over the years, she has interviewed several victims/families of victims of crimes seeking justice. She digs up stories that might otherwise remain unheard, and does her bit to ensure that victims and survivors’ voices are heard. Sumanti’s many years of experience also include interviews with Hamas attack survivors and mental health experts, among others. Her coverage of the October 7 Hamas attack on Israel and interviews with survivors of the tragedy, coupled with her other works including the Titan submersible coverage, earned her the Digi Journo of the Quarter award during her first year at Hindustan Times. Sumanti actively tracks missing person cases in the United States, and peruses Reddit and other social media platforms to bring to light cases that frequently elude public attention. She has extensively covered the disappearances of Nancy Guthrie, Thomas Medlin, Beau Mann, and Sudiksha Konanki, among others. When not at work, you will either find her with her novels, or with her beloved rescue pooches.Read More

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