Is Waterproof Dustproof too?

I am not a professional photographer. I work in a dusty environment. We need to take lots of pictures every day with several different cameras. Most of the waterproof point and shoots look like they have dinky little lenses. A year or so ago I remember seeing a Canon camera at a club store that had "dustproof" as a feature but I'm having little luck finding it again.

Are the waterproof cameras generally considered to be dustproof as well? Are there any "prosumer" level cameras with the dustproof feature that you know of?

Thanks for any assistance.

-Mickey