New Year’s Eve fireworks displays over water: a spectacle of light and its ecological costs

New Year’s Eve fireworks over water are among the most beautiful spectacles in the world – colorful explosions reflect on the surface of a bay or river, creating a magical show of light and color. But it is increasingly said that this tradition also has a dark side – for animals, air, and water.

The most famous New Year’s Eve fireworks displays over water

Sydney Harbour in Australia is famous for hosting the most spectacular fireworks display in the world. Thanks to its geographic location, Australians welcome the New Year among the first, so broadcasts can be watched by audiences around the globe even before fireworks light up their own time zones. The tradition dates back to the 1970s, and the iconic effect of a waterfall of lights cascading from the Harbour Bridge was shown for the first time in the 1980s. Every year, the sky above the bridge and the Sydney Opera House lights up with thousands of explosions: first, at 9:00 p.m., there is a shorter show (lasting about 8–10 minutes), designed especially for families with children, and precisely at midnight the main, longer spectacle begins, full of cascades and light waterfalls from the bridge, synchronized with music. This event attracts millions of viewers every year – hundreds of thousands watch it live, and millions more follow the television and online broadcast worldwide.

In Singapore, New Year’s Eve celebrations focus on Marina Bay. Modern architecture blends perfectly with colorful explosions over the bay. Thousands of spectators take places along promenades, bridges, and lawns around the water to watch fireworks launched from floating platforms, from beneath the Marina Bay Sands complex, and from the rooftops of surrounding buildings. Cascades of gold, red, blue, and green reflect in the calm surface, creating the impression of a second, mirrored sky filled with color.

Over the past few years, the show has evolved toward longer, multimedia performances – often lasting up to 30 minutes – enriched with projections on building facades, dynamic fountains, and lasers, making the New Year’s Eve celebration even more impressive and modern.

London, in turn, offers one of the most urban and densely built-in New Year’s Eve spectacles. The display is concentrated over the River Thames, around the London Eye: more than 12,000 fireworks are launched from barges on the river and platforms near the observation wheel, forming a dense wall of colors above Big Ben, the Palace of Westminster, and The Shard. Reflections in the river further enhance the impression, as if the city center were briefly immersed in multicolored explosions. The spectacle usually lasts 12–15 minutes, is precisely synchronized with music and the lights of the city’s icons, and the ticketed format helps maintain order and safety in the best viewing zones.

The dark side of setting off fireworks. What falls into the water?

Behind this beauty, however, lie serious ecological costs. Fireworks contain perchlorate salts, which enable intense combustion, as well as heavy metals responsible for colors – barium (green), strontium (red), copper (blue), as well as lead and antimony. After explosions, firework particles fall to the ground and into the water, causing significant pollution.

Studies show that after large displays over lakes or rivers, perchlorate concentrations in water can increase by several hundred times; for example, in American lakes after the Fourth of July, levels harmful to aquatic organisms and potentially to drinking water have been detected. Heavy metals accumulate in bottom sediments, poisoning fish and the entire food chain. Added to this are microplastics from casings and particulate matter, which worsens air quality.

Noise is no less problematic – explosions generate up to 150–175 dB, triggering panic attacks in animals. Waterfowl and nesting birds flee their nests en masse, and wild mammals such as deer and foxes run onto roads in terror, where they are often killed by cars. Studies show that elevated stress levels in wildlife can persist for several weeks after a display.

An alternative – drones and lasers

Fortunately, more and more cities are choosing ecological substitutes that deliver equally beautiful effects but without the costs of pollution and noise. Laser or drone shows create animated formations, lettering, and 3D figures – quietly, safely, and without waste.

These alternatives show that a New Year’s Eve spectacle can be both magical and responsible. Perhaps soon drones will become the new tradition over Sydney Harbour or the Thames?