The National data download has been modified as follows:
- Nov2014 was updated with a new version of dataset WET550. 
- Nov2014 was updated with a new version of dataset PUNITAGHYDRIC. 
- Nov2014 was updated with a new version of dataset PCTPRW. 
The new download file name is *National_Jul2015.zip.
- Minor metadata updates for data.gov requirements.
8/27/2015