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Here’s a look at the state map of communities that are high, moderate, and low risk for COVID-19

A sign encourages social distancing and mask wearing at the Old North Church in Boston.
A sign encourages social distancing and mask wearing at the Old North Church in Boston.Lane Turner/Globe Staff

The state releases a new map weekly that uses coronavirus case counts to show which Massachusetts communities are at high, moderate, and low risk for COVID-19 infection.

The assessment “will be updated on a regular basis going forward,” Governor Charlie Baker announced when he introduced the map on Aug. 11. It outlines each town’s average daily increase in cases per 100,000 people, over the most recent two-week period.

The map and its background data will be included in the Department of Public Health’s weekly public health dashboard, which is published every Wednesday.

The most recent map reflects data collected from Aug. 30-Sept. 12, and features 17 cities and towns in the highest-risk category. They are: Chelsea, Dedham, Everett, Framingham, Lawrence, Lynn, Lynnfield, Monson, Nantucket, New Bedford, Plainville, Revere, Saugus, Tyngsborough, Winthrop, Worcester, and Wrentham.

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The map includes a color-coded ranking system. Here’s what each color means:

- Red: Indicates municipalities that have more than eight cases per 100,000 people, which, based on a national and global health standard, means the community is at extremely high risk for COVID-19 infection.

- Yellow: Indicates municipalities that have between four and eight cases per 100,000 people, or a moderate level of risk.

- Green: Indicates municipalities that have less than four cases per 100,000 people.

- Gray: The lowest-risk color, which indicates there have been less than five total cases of COVID-19 reported in the last 14-day period.


Peter Bailey-Wells can be reached at peter.bailey-wells@globe.com. Follow him on Twitter @pbaileywells. Jaclyn Reiss can be reached at jaclyn.reiss@globe.com. Follow her on Twitter: @JaclynReiss