I want to find USA water hardness shapefiles. I have searched for it from here: https://www.epa.gov/waterdata/waters-geospatial-data-downloads but without success. Is there any good data source from where I can download these boundaries?

  • Does it have to be shapefiles
    – nmtoken
    Nov 12, 2018 at 21:14
  • @nmtoken Yes, that should be a shapefile
    – user122678
    Nov 12, 2018 at 21:15


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