Waste metals such as copper should not go to landfill. This is because they can contaminate ground water and soil, negatively affecting the surrounding environment and microorganisms. It can slow down the decomposition of organic matter in landfill and animals may absorb copper concentrations through the water and soil that harm their health.
Landfill space is also filling up and sending copper to landfill can incur a landfill tax. Instead, you should recycle any copper so it can be reused and have a more positive environmental impact. Learn more about metal recycling