Seasonal Fireworks Raise Air Quality Concerns Across the Globe

Fireworks are a familiar feature of cultural festivals, public celebrations and major events worldwide. However, growing research indicates that these colourful displays can significantly affect air quality, exposing nearby communities to fine particulate matter, chemical pollutants and potentially harmful smoke.

According to air quality monitoring company IQAir, fireworks have historically contributed to increases of up to 370 per cent in airborne particulate matter during weeks associated with seasonal celebrations.

As autumn festivals continue across several countries, researchers and environmental organizations are highlighting the importance of pollution monitoring, public awareness and cleaner alternatives.

Autumn Festivals and Fireworks Contribute to Air Pollution

Fireworks are widely used during religious holidays, sporting events and community gatherings, with autumn celebrations generating particularly high levels of activity in some regions.

In India, Diwali, the Hindu festival of lights, traditionally takes place in October or November. The festival symbolizes the triumph of light over darkness, with fireworks forming part of celebrations in many communities.

In the United States, fireworks remain popular during sporting events, seasonal fairs, amusement park activities and Halloween-related festivities.

South Korea also hosts major autumn fireworks celebrations, including the Busan Fireworks Festival. The annual event traditionally attracts more than one million spectators to Gwangalli Beach, featuring approximately 80,000 fireworks.

In Canada, fireworks are commonly associated with Canada Day, Victoria Day and certain cultural celebrations, including Diwali. Municipal regulations vary, with some communities restricting when and where fireworks may be used.

Large displays in densely populated areas can temporarily increase pollution concentrations, particularly when weather conditions prevent smoke from dispersing quickly.

What Pollutants Are Released by Fireworks?

Fireworks produce bright colours and visual effects through chemical combustion. During this process, several pollutants can enter the atmosphere.

Fine Particles and Chemical Emissions

Common fireworks-related pollutants include:

• Fine particulate matter (PM2.5) and larger particles (PM10)

• Lead, strontium, copper and aluminum

• Sulphur dioxide

• Carbon monoxide

• Ultrafine airborne particles

PM2.5 particles measure 2.5 micrometres or less in diameter and can penetrate deeply into the respiratory system.

Pollution concentrations depend on factors including wind speed, temperature, humidity and surrounding buildings. In some locations, elevated particle levels can persist after fireworks displays have ended.

Health Risks Associated With Fireworks Smoke

Exposure to fireworks-related pollution can irritate the eyes, nose, throat and respiratory system.

People with asthma, chronic respiratory conditions or cardiovascular disease may be particularly vulnerable to worsening symptoms during periods of elevated pollution.

Wildfire Risks Add to Environmental Concerns

Fireworks can also create fire hazards during dry conditions.

In Canadian communities already affected by wildfire smoke, additional particulate pollution from fireworks may further reduce local air quality.

Sparks from fireworks can ignite dry vegetation, potentially contributing to grassfires or wildfires when conditions are favourable for ignition.

Research Shows Significant Pollution Increases

International studies have documented substantial changes in air quality following major fireworks celebrations.

Findings From India, the United States and South Korea

A 2018 study in India identified statistically significant increases in air pollution associated with fireworks during Diwali celebrations. Agricultural burning and industrial emissions can compound these seasonal pollution problems.

In the United States, research published in 2015 found that particulate pollution increased by an average of 42 per cent following Fourth of July fireworks celebrations.

A 2025 South Korean study reported ultrafine particle concentrations seven to 12 times higher following the Busan Fireworks Festival compared with measurements taken on a non-event day.

These findings demonstrate how concentrated fireworks activity can cause substantial, although often temporary, deterioration in local air quality.

Communities Consider Cleaner Fireworks Alternatives

Environmental organizations are encouraging event organizers and municipal governments to consider measures that reduce pollution without eliminating traditional celebrations.

Technology Offers Lower-Pollution Options

Alternatives to conventional fireworks include drone light shows, projection mapping, synchronized LED displays, illuminated lantern installations and coordinated cultural performances.

Lower-emission and reduced-noise fireworks may also help limit some environmental impacts, although they do not eliminate pollution entirely.

Municipalities can further reduce exposure by designating fireworks zones, limiting display duration and incorporating environmental considerations into event approvals.

How Canadians Can Reduce Exposure to Fireworks Pollution

Residents can take practical precautions when fireworks are scheduled nearby.

Recommended measures include checking local air quality readings, limiting outdoor exercise during major displays, closing windows when smoke is present and using suitable indoor air filtration.

Setting heating and ventilation systems to recirculate indoor air may also help reduce the entry of outdoor pollutants.

In Canada, residents can consult the Air Quality Health Index (AQHI), where available, to better understand local pollution conditions and associated health risks.

Balancing Celebrations With Environmental Protection

Fireworks remain an important part of cultural traditions and community celebrations, but scientific evidence shows that their environmental effects extend beyond noise and visible smoke.

Improved air quality monitoring, responsible municipal planning and lower-pollution alternatives can help communities preserve festive traditions while reducing unnecessary exposure to harmful airborne pollutants.