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Tannin
Tannin
is a naturally occurring dye in some water supplies. It is a result of the
decay of vegetation such as leaves and tree trunks. It is often associated
with very old woodlands. It is what gives tea and coffee its coloration.
In this part of the
country, it is unusual but can occur. In standing water in a bathtub or
sink, you may see a light yellow color.
It is not harmful to drink
and is stains only mildly. However, it can be very unappealing to have this
coloration present in your water.
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