City of Iowa City issued the following announcement on August 05.
Following the latest guidance from the Johnson County Public Health Department, the City of Iowa City will now require all visitors to City facilities to wear a mask while inside the building. The new guidance comes as a protective measure against the spread of the COVID-19 Delta variant throughout Iowa.
The City facility masking requirement will take effect Friday, Aug. 6, 2021.
Last month, the Centers for Disease Control and Prevention (CDC) issued new guidance to help slow the spread of the Delta variant. The CDC recommended that those in areas of substantial or high transmission wear masks while indoors in public, whether they are vaccinated or unvaccinated. https://covid.cdc.gov/covid-data-tracker/#county-view
Original source can be found here.