If you are creating (or have now) a localized website, it's
recommended that you mention your geographical information
on your pages. That may seem overly simple (a "Duh!" statement),
but many webmasters will not target their specific ZIP codes
and such. Google Webmaster Tools has an option to associate
your site to a geographical location, and that's one great
point to stress if your audience is localized.

Todays SE's robot crawlers are looking for area codes, zip
codes, and even cities so they can bring more relevant searches
returned to their users.

So think about that when tweaking your localized sites.