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Web Resources -- Reference Links
refdesk.com, "The single best source for facts on the Net."
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Water Resources
- Bi-national Colonias Planning Project, Interactive GIS database mapping colonias in Arizona and Mexico.
- SALSA, Semi-Arid Land-Surface-Atmosphere Program. "The Semi-Arid Land-Surface-Atmosphere ("SALSA") Program is a multi-agency, multi-national global-change research effort that seeks to evaluate the consequences of natural and human-induced changes in semi-arid environments. Current SALSA research is focused on the upper San Pedro River basin in southeastern Arizona, USA, and northeastern Sonora, Mexico".
- U.S. Environmental Protection Agency, "EPA enforces federal clean water and safe drinking water laws, provides support for municipal wastewater treatment plants, and takes part in pollution prevention efforts aimed at protecting watersheds and sources of drinking water. The Agency carries out both regulatory and voluntary programs to fulfill its mission to protect the nation's waters."
- University of Arizona Library Water/Hydrology Subject Area, An extensive site with local and Web resources.
- U.S. Geological Survey: Water Resources of the United States, The U.S. Geological Survey has the principal responsibility within the Federal Government to provide the hydrologic information and understanding needed by others to achieve the best use and management of the Nation's water resources.
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