|Center for Environmental Education and Information|
CEEI documents polluted streams in the United states by publishing on the web all the Clean Water Act 303(d) lists and documentation.
|Great Lakes Aquatic Habitat Network and Fund|
Provides information and financial support to those working to protect and restore shorelines, lakes, rivers, wetlands, and other aquatic habitats in the Great Lakes Basin. Includes news and grant information.
|Ground Water Atlas of the United States|
Online USGS publication describes U.S. ground-water resources by region. Covers the 50 states, Puerto Rico, and the U.S. Virgin Islands.
|USGS - Arsenic in ground water of the United States|
Publications, maps, and data on arsenic in U.S. groundwater.
|USGS -- Water Resources of the United States|
Information about water resources from the U.S. Geological Survey. Topics include ground water, surface water, water use, water quality, acid rain, toxic substances hydrology.
|Watershed Information Network|
EPA guide to information and services for protecting and restoring water resources. Includes state and local watershed information.