DGS offers many data sets as WMS and WFS services.
First State Geology has been the newsletter of DGS for over 25 years. 
Primary Data Category:
Hydrogeology Publication Date:
Jul 2006Summary:
The unconfined portion of the Columbia aquifer is a key hydrologic unit in Delaware, supplying water to many agricultural, domestic, industrial, public, and irrigation wells. The aquifer is recharged through infiltration of precipitation and is the source of fair-weather stream flow and water in deeper confined aquifers. The aquifer occurs in permeable sediments ranging in age from Miocene to Recent. Over most of Delaware, the top of the unconfined or water-table portion of the Columbia aquifer occurs at depths less than 10 feet below land surface. Because of the permeable character of the aquifer and its near-surface location, the unconfined aquifer is highly susceptible to contamination.
Downloads and Data
Associated Publication(s):
Please Note: Many datasets on this site are available as compressed and zipped 7z files. To "unzip" the 7z file, you must obtain the free and open source 7zip program.
Geography
Live Preview Available!
<= click map to preview data
Web Map Service (WMS) Information
WMS URL: http://maps.dgs.udel.edu/fcgi-bin/sussex_unconfined?
Layer Names: de_susselev, de_sussthick, de_susstrans
WMS Note: When adding WMS service URLs to ESRI ArcMAP v9.x make sure to reset the "Default Version" to 1.1.1
Spatial Reference System(s)
NAD_1983_UTM_Zone_18N Meters
Use Constraints
Please give proper credit to the Delaware Geological Survey.
