For example, the ANPR proposes using a  Federal Financial Institutions Examination Council Online Census Data System 2018 and U.S. Census Bureau American Community Survey 2014-2018.
A tract is designated as distressed if it is a nonmetropolitan middle-income tract that meets one or more of the following triggers: (1) an unemployment rate of at least 1.5 times the national average; (2) a poverty rate of 20 percent or more; or (3) a population loss of 10 percent or more between the previous and most recent decennial census or a net migration loss of 5 percent or more over the five-year period preceding the most recent census.