It can also as bad seal around the windshield.

JamesStep@gmail.com wrote:
> I have a 2000 Accord. A few weeks ago I removed the floor mat on the
> driver's side and discovered that the carpet underneath was soaking
> wet. (The passenger side was dry.) I dried the carpet thoroughly and
> put a new, winter floor mat over it, but when I looked under the mat
> today the carpet was soaking wet again. :/
>
> Should I remove the carpet and look for leaks? Or is it more likely
> that water is dripping down from under the dash?
>
> Jim
>