Copper in drinking water is primarily the result of...

Copper in drinking water is predominantly a result of corrosion within the distribution system. When water travels through pipes, especially older ones made of copper, the water can cause the copper to leach into the drinking water. This leaching process can be exacerbated by factors such as water acidity, temperature, and the duration of water contact with the pipes.

In contrast, while naturally occurring mineral deposits can contribute to copper levels in some water sources, they are not the primary source of copper found in treated drinking water. Industrial pollution can introduce various contaminants into water systems, but copper from this source is typically less significant compared to the corrosion of existing infrastructure. Automobile exhaust does not have a direct impact on copper levels in drinking water, as copper is not a primary component of vehicle emissions. Overall, the corrosion of copper pipes in the water distribution system is the main route by which copper enters potable water supplies.