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Chlorpyrifos
Quick Resources
Team Leader: Tom Myers (myers.tom@epa.gov), 703-308-8589
Press Contact: Dale Kemery (kemery.dale@epa.gov), 202-564-4355
- For more recent information about this pesticide, see the chlorpyrifos registration review page.
Docket Information
- Documents related to EPA's review of this pesticide can be found in the following dockets:
- Risk assessment and related documents for this pesticide have been removed to Special Docket EPA-HQ-OPP-2007-0151.
- Visit Regulations.gov for information about other pesticide reregistration chemicals.
Decision Documents
- Reregistration Eligibility Decision (RED)(PDF) (260 pp, 3.5 MB, About PDF) - July 2006
- Chlorpyrifos Interim Risk Management Decision (IRED)(PDF) - September 28, 2001 (259 pp, 546k, About PDF)
- Chlorpyrifos IRED Fact Sheet
Endangered Species
- 5/7/2010: Manufacturers Decline to Adopt Pesticide Use Limitations to Protect Endangered Species (PDF) (3 pp, 163k, about PDF)
- 4/29/2010: EPA Gives Pesticide Manufacturers Two Weeks to Commit to Modifications to Protect Endangered Species
- 9/11/2009: New Limitations on Pesticide Uses Will Protect Salmon - EPA has announced plans to place additional limitations on the use of three organophosphate pesticides -- chlorpyrifos, diazinon, and malathion -- to protect endangered and threatened salmon and steelhead in California, Idaho, Oregon and Washington.
Federal Register Notices
- Atrazine, Chloroneb, Chlorpyrifos, Clofencet, Endosulfan, et al.; Tolerance Actions (Final Rule) [September 14, 2011]
- Atrazine, Chloroneb, Chlorpyrifos, Clofencet, Endosulfan, et al.; Proposed Tolerance Actions [May 4, 2011], comments accepted through July 5, 2011
- FIFRA Scientific Advisory Panel; Notice of Public Meeting [December 8, 2010], comments accepted through January 31, 2011
- FIFRA Scientific Advisory Panel; Notice of Cancellation of Public Meeting - [October 15, 2010]
- FIFRA Scientific Advisory Panel; Notice of Rescheduled Public Meeting [September 15, 2010], comments accepted through October 26, 2010
- 2,4-D, Bensulide, Chlorpyrifos, DCPA, Desmedipham, Dimethoate, Fenamiphos, Metolachlor, Phorate, Sethoxydim, Terbufos, Tetrachlorvinphos, and Triallate; Tolerance Actions [September 17, 2008]
- Petition to Revoke All Tolerances and Cancel All Registrations for the Pesticide Chlorpyrifos; Notice of Availability [October 17, 2007], comments accepted through December 17, 2007
- Organophosphate Pesticide; Availability of Chlorpyrifos Interim Risk Management Decision Document [November 14, 2001], comment period closed on January 14, 2002
- Chlorpyrifos; Receipt of Requests for Amendments, Cancellations, and Notification of Tolerance Revocation and Modifications [September 20, 2000], comment period closed on October 20, 2000
- Organophosphate Pesticide; Availability of Revised Risk Assessments [August 16, 2000], comment period closed on October 16, 2000
- Organophosphate Pesticide; Availability of Preliminary Risk Assessments [October 27, 1999], comment period closed on December 27, 1999