Why did this county show up on my background check?

An address history trace is performed using the SSN, drawing information from various public and proprietary sources. The address history trace helps identify the counties where an applicant resided while associated with the SSN provided.  It is important to note that the Address History Trace report is intended solely as a resource and should not be used to adversely affect your employment/volunteer prospects. To obtain a thorough understanding of your credit history, you can acquire copies of your credit reports from all three credit bureaus at www.freecreditreport.com. Additionally, county searches may be conducted as part of a package ordered by your potential employer or the organization where you plan to volunteer.