This feature service was created by calculating the percentage and acreage of impervious surface within census tract polygons. Impervious surface data used in this calculationis from 2015. Created using 2020 Detroit census tracts.This feature service will not be updated. Instead, new services will be created once DWSD receives new impervious surface data.If there are any questions about this data, please email dwsdGIS@detroitmi.gov