The Williamstown health inspector said Thursday he has no idea why the commonwealth's COVID-19 Community Level map is showing Williamstown as the lone "yellow" community in Berkshire County.
Late Wednesday, the state Department of Public Health posted its latest weekly map categorizing all 351 Massachusetts municipalities as "higher risk (red), moderate risk (yellow), or lower risk (green)" for the current rate of spread of the novel coronavirus.
According to the map, Williamstown has had five cases in the last two weeks and an average daily incidence rate per 100,000 people of 4.85.
It is one of four communities in Western Massachusetts designated as yellow, joining Easthampton, Holyoke and Wilbraham on that list. Monson is the lone town in the region listed in the red, with an incidence rate per 100,000 of 8.47, according to the commonwealth.
Williamstown's Jeff Kennedy was at a loss to explain how the town of 7,700 moved from grey (fewer than five reported cases) to yellow (4 to 8 cases per 100,000) in the period from Sept. 2 to Sept. 9.
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