What causes the pink stain on bathroom fixtures?  Add your
answer...  1 Answer  The reddish-pink stain or residue that is
frequently found around bathroom sinks, shower stalls, and pets'
water bowls, is not by the water supply but by naturally
occurring airborne bacteria that produce a reddish pigment.
There are numerous bacteria in the environment that find their
way onto bathroom and kitchen fixtures. Most do not cause
disease. These bacteria are found in soil, food, and on animals,
and they may become airborne because of construction or wind. It
is not uncommon to find the pinkish film appearing after new
construction or remodeling activities. This link is broken. Help
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