I can’t imagine what factors they used for this. Our distant suburban/country area, where everyone is on 2 acres or more, is indicated as “high risk.”
The part of the nearby city where the Soros organizations were placing in rented apartments the government sponsored “refugees” from places like Camaroon, Burma or Somalia, are ranked as “low risk.”
The risk level is probably based on cases versus population. Thus 5 cases in a scattered population would appear higher risk than 5 cases in a dense population.