Independence Day Fireworks Can Impact Local Air Quality

South Coast AQMD wants to remind residents that the upcoming Independence Day holiday will likely lead to higher levels of fine particulate matter (PM2.5) in the South Coast Air Basin on July 4th and July 5th. Personal and commercial firework displays are the main contributors towards poor air quality during the holiday. Residents can help keep their air clean by refraining from using personal fireworks.

Fireworks are known to emit high levels of PM2.5 and PM10 as well as metal air pollutants, all of which can contribute to negative health effects. Breathing high levels of fine particulate matter can lead to a wide variety of cardiovascular and respiratory health effects such as heart attacks, asthma aggravation, decreased lung function, coughing and difficulty breathing.

Air quality on July 4th and July 5th varies each year depending on the amount of pollution from fireworks and weather conditions. During periods of poor air quality, residents can reduce how much pollution they are breathing by keeping outdoor activities brief and avoiding vigorous physical activity. Air conditioning with a high efficiency filter and/or an air purifier can also help reduce indoor pollution levels. Residents can check their outdoor air quality with the South Coast AQMD app or at

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South Coast Air Quality Management District

21865 Copley Dr, Diamond Bar, CA 91765


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