>>>>I've seen one faucet with a huge lump of white sediment grown around it... in a water quality testing laboratory in Hungary. Now that was a water which tasted great, but if you didn't wipe the glass immediately after washing it, the water drops would leave white outlines.
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>>>We have hard water here on the chalk south coast. Even the rain (mixed in with salt sea air) leaves white marks on you windscreen. When I go back up north visiting, when washing I always end up with too much lather as I'm used to vigorously agitating the soap down south. :-)
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>>You can chalk it off on regional differences.
>
>"chalk it up to ..."

I figured you'll know that region of the grammar far better than I would :).