Bronze foundries play a vital role in metal manufacturing, but their operations can have significant environmental consequences. Key impacts include air pollution from furnace emissions, water contamination from metal residues, and hazardous waste generation. Foundries release particulate matter, sulfur dioxide, and volatile organic compounds (VOCs), contributing to smog and respiratory health risks. Wastewater often contains heavy metals like lead and cadmium, posing threats to aquatic ecosystems.

To address these challenges, modern foundries implement several mitigation strategies. Advanced filtration systems, such as baghouses and electrostatic precipitators, capture airborne pollutants before release. Water treatment plants remove toxic metals from wastewater, while closed-loop systems minimize consumption. Many foundries now recycle bronze scrap, reducing both mining demand and landfill waste. Some facilities also transition to cleaner energy sources like electric induction furnaces. Regulatory frameworks like the EPA's Metal Casting Standards enforce emission limits and waste disposal protocols.

Emerging green technologies show promise for further reducing environmental harm. Bio-based binders in molds decrease VOC emissions, and 3D-printed sand molds generate less waste than traditional methods. As sustainability becomes a priority, the bronze casting industry continues evolving toward eco-friendly practices that balance production needs with environmental protection.