Seventy years of safe use and the body of scientific and medical evidence demonstrate that chromated copper arsenate (CCA) pressure treated wood is safe when used as recommended. The reports and presentations below, from a wide range of scientific and medical sources, offer compelling evidence that no adverse health effects are associated with exposure to chromated copper arsenate (CCA) pressure treated wood.

WPSC Scientific Reports are available for download in PDF format. You need the Adobe Reader to view PDF documents. If you need a current version of the FREE Adobe Reader, please download it here.

Use the links below to download any of our scientific reports:

Paper of the year - Human and Ecological Risk Assessment Journal honors research of Dr. Steven Lamm as 2005 Paper of the Year

Read the Report: "Arsenic Ingestion and Bladder Cancer Mortality" by Dr. Steven Lamm

Meta-analysis of low level arsenic exposure studies August 2005

Comments on EPA reviews of low level arsenic exposure studies August 2005

Exposure To Arsenic In The Diet Presents A Greater Risk To Human Health Than CCA-Treated Wood

Relationship Between CCA-Treated Wood and Incidence of Cancer In The United States Dr. Daniel C. West February 2004

A Body of Recent Epidemiology Studies Indicate that EPA’s Current Model Overstates Risk of Low Dose Exposure to Inorganic Arsenic

Arsenic on the Hands of Children after Playing in Playgrounds Dept. of Health Sciences, University of Alberta June 17, 2004

A Scientific Analysis of EPA Probabilistic Risk Assessment October 16, 2003

Comments on Selected Sections of the February 2003 CPSC Briefing Package RE: Petition to Ban Chromated Copper Arsenate (CCA) - Treated Woods in Playground Equipment (Petition HP 01-3)

Relative Bioavailability of Inorganic Arsenic (Attachment to report to CPSC)

Florida Physicians Workgroup Report

Testimony of Louis Sullivan to CPSC March 17, 2003

Evaluation of Human Health Risks from Exposure to Arsenic Associated with CCA-Treated Wood

		Assessments of Risk from Exposure to Chromated Copper Arsenate (CCA) Pressure Treated Wood in Decks, Playgrounds and the Soil Beneath Them.
		01: Wood Surface Exposure 02: Soil Under Decks 03: Soil Under Playground Equipment