It’s that time of year again when South Coast AQMD reminds you that fireworks, especially during upcoming Independence Day displays, will likely lead to higher levels of PM2.5. Air quality typically reaches Very Unhealthy or Hazardous levels on the evening of July 4th and can persist throughout the morning of July 5th. Poor air quality during the holiday is mainly due to increased use of both personal and commercial fireworks. Residents can help keep their air clean by refraining from using any type of fireworks during this time.

Fireworks emit high levels of particulate matter and PM2.5 as well as metal air pollutants, all of which can contribute to a variety of negative health effects. High levels of these pollutants 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 number of fireworks as well as weather conditions, which tend to be hotter and more stagnant during the summer months. During periods of poor air quality, residents are urged to reduce their exposure 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.

Stay informed and check your outdoor air quality using the South Coast AQMD Mobile App, or viewing current air quality on the map at www.aqmd.gov/aqimap.