In Massachusetts, an environmental justice (EJ) population is a neighborhood where one or more of the following criteria are true:
the annual median household income is 65 percent or less of the statewide annual median household income
minorities make up 40 percent or more of the population
25 percent or more of households identify as speaking English less than "very well"
minorities make up 25 percent or more of the population and the annual median household income of the municipality in which the neighborhood is located does not exceed 150 percent of the statewide annual median household income.
The state organizes environmental justice communities by census-designated block groups. In Milton, there are 24 block groups, 8 of which are identified as EJ block groups due to meeting either the income threshold, the minority population threshold, or both, which represents about 29% of Miltonians.