4,023,807 Iowans have been tested for the coronavirus to this point. 362,279 have tested positive. 5,438 of those have now died. Here are the approximate active case totals for local counties: Bremer County has 242. Butler County has 126. Floyd County has 188. Chickasaw County has 92. Fayette County has 147. Buchanan County has 187. Black Hawk County has 1,856.