This marks a 7.6% decrease from Labor Day, when the county reported 407 active cases.
Beginning this week, the Tennessee Department of Education launched a new online dashboard tracking the number of cases in school districts across the state. As of this week, Williamson County Schools has 21 new coronavirus cases, including 16 student cases and seven staff cases.
Franklin Special School District reported no new student cases this week and fewer than five staff cases.
Statewide, Tennessee reported 759 new cases in schools, with 516 student cases and 243 staff cases.
According to a Sept. 8 update from WCS, 55 staff members and 464 students were in isolation or quarantine.
Cases have been identified in 33 of the district 49 schools.
See a timeline of active cases in Williamson County below.