Hydrologic Data

Delaware is primarily a water state and monitors the environmental hydrologic conditions closely. The links below provide information on data sets related to hydrologic information in Delaware.

USGS National Water Information System (NWIS)

• USGS NWIS - Delaware Current Conditions for streams/rivers and tide stations
• USGS National Water Information System - National Mapper

NOAA National Ocean Service (NOS)

• Delaware bay Operational Forecast System (DBOFS)
• Delaware River and Bay PORTS

DGS Groundwater

• Recent and Historical Groundwater Level Data

Hydrographic Mapping

• GIS data sets of Delaware rivers, streams, and other water bodies, including watersheds at various scales, are available through the USGS National Hydrography Dataset. Data access is described on the DEMAC Delaware Basemap page.