City of Sioux City issued the following announcement on July 27.
In an effort to help reduce the spread of COVID-19, Sioux City Transit passengers will be required to wear protective masks or face coverings on buses beginning Wednesday, July 29 until further notice.
While riding the bus and within City facilities, passengers are asked to practice social distancing as much as possible.
Find route information at www.sioux-city.org under the Services tab.
Original source can be found here.