Citation
USGS National Water Information System
Abstract
The USGS National Water Information System (NWIS) provides access to millions of sites measuring streamflow, groundwater levels, and water quality. This web service provides methods for retrieving daily values data, such as discharge and water levels, from NWIS. For more information about NWIS, see the NWIS home page at http://waterdata.usgs.gov/nwis