Livingston County Health Department issued the following announcement on July 22.
Research shows that masks can greatly reduce the chance of spreading COVID-19, especially when approximately 40% of those who have COVID-19 may be asymptomatic. We can only contain the virus and keep Michigan open if everyone stays careful and masks up when they leave home, whether they feel sick or not.
Source: https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover-guidance.html#recent-studies
Original source can be found here.
Source: Livingston County Health Department