Why is my body water % so low?

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Why is my body water % so low?

I drink between 8-10 glasses of water a day (8oz glasses) and also have a few decaff tea's and coffee's.

After using my scales this morning it showed that my Body Fat % was at 32% but my water % was only 45.2%.

From looking on the good old internet I found I should range between 49-52% of which I normally do! I certainly did when I was drinking less water :/

It's never been this low before, yet I have never drank this much water before either.

I feel fine in myself so I'm not worried, I am just trying to understand what on earth is going on.