{ "layers": [ { "currentVersion": 11.1, "cimVersion": "3.1.0", "id": 1, "name": "EJ Index Exceedances", "type": "Feature Layer", "description": "

An EJ index combines demographic factors with a single environmental factor. For example, the EJ index for traffic is a combination of the following populations residing in the Census block group:<\/SPAN><\/P>