Association of American Pesticide Control Officials
http://www.aapco.org/

California Department of Pesticide Regulation
http://www.cdpr.ca.gov

Clemson University, Pesticide Information Program
http://www.clemson.edu/extension/pest_ed/

Code of Federal Regulations
http://www.gpoaccess.gov/cfr/index.html

Cornell University, Cooperative Extension Program
http://www.cce.cornell.edu/Pages/Default.aspx

Environmental Protection Agency
http://epa.gov/

EPA Pesticide Active Ingredients Search
http://iaspub.epa.gov/apex/pesticides/f?p=chemicalsearch:1

EXTOXNET
http://extoxnet.orst.edu/

Federal Register
http://www.gpoaccess.gov/fr/index.html/

Hazardous Substances Data Base
http://toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?HSDB

Health Canada: Pesticide Management Regulatory Agency
http://www.pmra-arla.gc.ca/english/index-e.html

Library of selected labels and MSDS information
http://www.cdms.net/LabelsMsds/LMDefault.aspx

Minnesota Pesticide Resource Center
http://www.extension.umn.edu/pesticides/index.html

National Pesticide Information Center (NPIC)
http://npic.orst.edu/pest/index.html

R5 Pesticide Use Management
http://www.fs.usda.gov/detail/r5/forest-grasslandhealth/?cid=fsbdev3_046692

R10 State of Alaska pesticide control program website
http://dec.alaska.gov/eh/pest/

Syracuse Environ. Research Assoc., Inc.
http://www.sera-inc.com

USDA Forest Service
http://www.fs.fed.us/

USDA Office of Pesticide Management Policy
http://www.ars.usda.gov/Research/docs.htm?docid=12430

USGS national water quality assessment program – pesticide synthesis project – water quality info.
http://water.usgs.gov/nawqa/pnsp/

University of Arizona
http://ag.arizona.edu/pito/

Virginia Tech University
http://www.vtpp.ext.vt.edu/