Vulnerable residential area
"Vulnerable residential area" (Danish: Udsat boligområde) is an official term for a social housing district in Denmark which fulfils certain statistical criteria of relatively low employment/school attendance, relatively low income, a relatively low educational level and/or relatively many convicted inhabitants. If more than 50% of the residents in a vulnerable area are non-Western immigrants and their descendants, the area is additionally designated a "parallel society".
Source: Wikipedia — Vulnerable residential area (CC BY-SA 4.0)