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Thanks, Jane (and Eric, too):

We haven't actively made any effort to build links, so we haven't actively been doing anything that would attract undesirable backlinks.  I guess we'll have to comb through and maybe disavow any that are questionable.

Wouldn't any sort of  penalty affect rankings more-or-less uniformly, though?  That is why I was leaning toward social/local to explain the disparity in performance from one geographical location to another.

Thanks for the assist!

Our website http://www.survive-a-storm.com has historically performed well in Google for the search terms "storm shelters" and "tornado shelters."  Our geographic focus is nationwide, but we are particularly interested in ranking up for Oklahoma.

Right now we are hovering at about the third position in Yahoo/Bing, and in some geographic areas (i.e., as selected in Google's search settings) we are doing reasonably to quite well for these terms in Google (i.e., first page).

In Oklahoma, though, we are holding steady around positions 20-25.  We have just changed the title tag on our home page, cleaned up a bit of on-page optimization, and are going to work on getting some more optimized content on the page.

We are outperforming the competition on Domain Authority (38) and Page Authority (46), and as far as I can tell, other key metrics are respectable.  Our social isn't bad, but could always use improvement--which we are working on.

Any idea why we might be lagging so badly in Google?  Any help would be appreciated!