Chromated Copper Arsenate (CCA) and Its Use as a Wood Preservative
Chromated Copper Arsenate (CCA) is a chemical mixture consisting of three pesticidal compounds (arsenic, chromium, and copper) registered for wood preservative uses. EPA is currently reassessing CCA as part of its ongoing reregistration program for older pesticides. Federal law directs EPA to periodically reevaluate older pesticides to ensure that they continue to meet current safety standards. We have updated this Web site to reflect recent changes to the status of the registration for CCA.
Guidance Document for Revised CCA Label: Supplemental Guidance on Interpretation of Revised CCA Wood Preservative Label (165 KB, 16 pages, PDF) and Guidance for Uses of CCA Referencing AWPA Commodity Standards - June 16, 2004
Questions & Answers: Guidance Document
for Revised CCA Label - June 17, 2004
Questions & Answers: Preliminary Risk Assessment for Workers Who Contact Wood Preservatives Containing Arsenic and/or Chromium and Ecological Effects Assessment - March 19, 2004
Federal Register: March 17, 2004 ( (Volume 69, Number 52), Notice of Availability of the Preliminary Risk Assessment for Wood Preservatives Containing Arsenic and/or Chromium Reregistration Eligibility Decision
Questions & Answers: Scientific
Advisory Panel’s Final Report on Preliminary Probabilistic Risk
Assessment for Chromated Copper Arsenate - February 12, 2004
Cancellation of Residential Uses of CCA-Treated Wood Questions & Answers and a Press Advisory about this transition released on March 20, 2003.
EPA Testimony, U.S. Consumer Product Safety Commission (CPSC) Public Meeting, regarding the Petition to Ban Chromated Copper Arsenate (CCA)-Treated Wood in Playground Equipment, March 17, 2003.
On March 17, 2003, CPSC held a public hearing to consider a petition to ban the sale of CCA-treated wood in playsets. CPSC also seeks public comments by publishing petitions in the Federal Register.
Federal Register: February 22, 2002 (Volume 67, Number 36), Notice of Receipt of Requests to Cancel Certain Chromated Copper Arsenate (CCA) Wood Preservative Products and Amend to Terminate Certain Uses of CCA Products Products.
Manufacturers to Use New Wood Preservatives, Replacing Most Residential Uses of CCA-Treated Wood. A Questions and Answers document and a Press Release about this transition publicized on 2/12/2002.
On October 23-25, 2001, the Scientific
Advisory Panel met to discuss issues pertaining to children's exposure
from contact with CCA-treated wood playground structures and contaminated
soil. From the results of this meeting, the Panel issued a final
report announced in an Agency press
release on 12/13/2001.
Public Input Sought Regarding CCA-Treated Wood Study Methods - 09/24/2001
Stronger Consumer Information Program, Scientific Advisory Panel Meeting Announced for CCA-Treated Wood - 07/03/2001
EPA Comments on American Wood Preservers Institute (AWPI) Proposal - 06/29/2001 (245kb, PDF)
Public Meeting Planned to Discuss CCA-Treated Wood - 05/31/2001
Updated!-- Questions & Answers - What You Need to Know About Wood Pressure Treated with Chromated Copper Arsenate (CCA): Provides updated answers to commonly asked questions about CCA, its uses and potential hazards.
Updated!-- Evaluating the Wood Preservative Chromated Copper Arsenate (CCA): Describes EPA's comprehensive reassessment of the science and uses of CCA, along with some key issues under consideration.
Consumer Safety Information Sheet - Inorganic Arsenical Pressure-Treated Wood: Provides information on the safer use and handling of CCA-treated wood.
Agency for Toxic Substances and Disease Registry (ATSDR): ATSDR has established a series of summaries about hazardous substances, including arsenic. Each summary serves as a quick and easy-to-understand guide. Answers are provided to the most frequently asked questions about exposure to hazardous substances found around hazardous waste sites and the effects of exposure on human health.
National Pesticide Information Center (NPIC): NPIC, a cooperative effort of Oregon State University and EPA, provides objective, science-based information about a wide variety of pesticide-related subjects, which include the following: pesticide products, recognition and management of pesticide poisoning, toxicology, and environmental chemistry.
U.S. Consumer Product Safety Commission (CPSC): CPSC is an independent Federal regulatory agency that works to reduce the risk of injuries and deaths from consumer products. CPSC has jurisdiction over about 15,000 types of consumer products, from automatic-drip coffee makers to toys to lawn mowers. This site includes information on a petition from the Environmental Working Group and the Healthy Building Network to ban arsenic-treated wood in children's playground equipment.
U.S. EPA's Office of Water - Arsenic Assessment: The U.S. Safe Drinking Water Act requires EPA to revise the existing 50 parts per billion (ppb) standard for arsenic in drinking water. This site provides information on EPA's assessment of arsenic in drinking water.
U.S. Geological Survey (USGS) Mineral Commodity Summaries of Arsenic: The USGS serves the Nation as an independent fact-finding agency that collects, monitors, analyzes, and provides scientific understanding about natural resource conditions, issues, and problems. This page provides information about arsenic as a commodity.