USGS Ground-Water Data
http://water.usgs.gov/ogw/data.html

USGS


This is an entryway to a variety of USGS groundwater data. Data types include water levels in wells across the nation, access to each state's hydrologic data repositories, water use figures, GIS data for water resources, and more.


Subject: Geoscience:Hydrology:Ground Water:Water and society, policy, and management
Resource Type: Datasets and Tools:Datasets
Data Source: Real-Time Data, Observational Data
Science Background Required: Broadly accessible
Topics: Hydrosphere/Cryosphere:Groundwater:Water and society, policy, and management