Federal Agencies
Geodata.gov- U.S. Maps & Data http://gos2.geodata.gov/wps/portal/gos
United States Geological Survey- The National Map http://nationalmap.gov/nmjump.html
Environmental Protection Agency, Region VI, http://www.epa.gov/Region06//6en/gis/r6gis.htm
United States-Mexico Border Health Commission, http://www.borderhealth.org/resources.php
State Agencies
Texas Natural Resource Information System http://www.tnris.state.tx.us/
Borderlands Information Center http://www.bic.state.tx.us/
Texas Commission on Environmental Quality http://www.tceq.state.tx.us/gis/
Arizona Department on Environmental Quality http://www.azdeq.gov/function/assistance/index.html
New Mexico Water Resources Research Institute Links page http://wrri.nmsu.edu/links/links.html
New Mexico Environment Department http://gis.nmed.state.nm.us/nmed/nmed_login.jsp
California Spatial Information Library http://gis.ca.gov/index.epl
Local Government
Paso del Norte Watershed Council http://www.pdnwatershed.org/