Nobody can block every stray search. You can decide what a stray visitor sees when they land.
Many people who land on an Arlington business site were never going to hire you. Some typed "Arlington" and meant Virginia, or one of the 19 other states with a place by that name. Others are in town for a game or a concert and searching from a hotel room.
You cannot stop all of that before it reaches you. You can control what happens next, and that is the real job of Arlington web design. Locals should see at once that you serve them. A visitor from out of state should see it too, and leave before either of you loses time.
The form helps by asking for a ZIP code first. Your reports help by counting local and out-of-area visits on their own lines. Then a slow month or a sudden spike tells you something true about your pages.