Mask mandate for Mason City not being planned at this time Despite an uptick in COVID-19 cases and many municipalities reinstating a mask mandate to curb the spread of the virus, the City of Mason City currently has no plans to implement a mask mandate. Posted: Jul 28, 2021 11:52 PM Updated: Jul 29, 2021 7:15 AM Posted By: Alex Jirgens MASON CITY, Iowa - During the peak of the pandemic, businesses required customers to mask up. When vaccinations became available, the use of masks diminished overall. However, as the so-called Delta variant seemingly runs amok and vaccination rates remain flat, many municipalities are discussing or implementing mask mandates again.