I regularly dine at DCA prior to flights. Came across this listing of restaurant health code inspections. From the link, click on "restaurant inspections" then on "Washington National Airport." Keep in mind you might be better off not knowing about some of the nasty stuff going on in the kitchens. Airline club info is strangely lacking in detail.

http://www.healthspace.ca/Clients/VD...on_Website.nsf

If you want to check Dulles, follow this URL and click on Loudon County (there's no separate Dulles category):

http://www.healthspace.ca/vdh