Contaminants in water http://toxics.usgs.gov/regional/emc.html
Nutrients and Pesticides http://water.usgs.gov/pubs/circ/circ1225/
Nutrients in the Mississippi basin and Gulf of Mexico http://wwwrcolka.cr.usgs.gov/midconherb/
Natural hazards http://www.usgs.gov/natural_haz.html
Urban growth studies http://edcwww2.cr.usgs.gov/urban/
Wildlife research or epidemiological investigations http://www.umesc.usgs.gov/nwhchome.html
Biological Invaders http://www.usgs.gov/invasive_species/.
Global change http://geochange.er.usgs.gov/
Coastal water conditions http://marine.usgs.gov