Here's why and how copper gets into the water:
* Copper Pipes: The most common reason for green hair is copper in the water supply. Copper pipes, especially in older homes, can corrode and release copper ions into the water.
* Water Chemistry: The pH of the water can affect how much copper is dissolved. More acidic water tends to dissolve more copper.
* Well Water: Well water can sometimes have naturally occurring copper.
When you wash your hair with water containing copper, the copper ions can bind to the proteins in your hair. This is especially noticeable in lighter hair colors like blonde, bleached, or gray hair, as the green tint is more visible.
Therefore, if spring water is sourced and bottled properly, it should not contain high levels of copper and should not turn your hair green. However, if the spring water is sourced from a location with high copper content or is transported through copper pipes, it could potentially contribute to the greening effect.
To summarize: It's the copper, not the water source itself, that's the issue. Spring water is less likely to be the problem, but it's not impossible.