NCI's Cancer Cluster Web site Provides an extensive overview of cancer clusters, including facts about cancer, the environment, and heredity; methods used in investigating suspected cancer clusters; guidelines for reporting suspected cancer clusters; and a list of additional resources.
Cancer and the Environment: What You Need to Know, What You Can Do Published as a collaboration between the National Cancer Institute and the National Institute for Environmental Health Sciences, this booklet addresses concerns about the connection between cancer and exposure to toxic substances in the environment. It contains information about which types of substances are either known to cause or likely to cause cancer, and what can be done to reduce exposures to them. It also explains how scientists discover which substances are likely to cause cancer. The booklet provides an extensive overview of environmental causes of or risk factors for cancer including lifestyle factors such as diet and physical inactivity, certain medical drugs, hormones, radiation, viruses, bacteria, and environmental chemicals that may be present in the air, water, food, and workplace.
Report on Carcinogens Produced by NIEHS every other year, this report contains an extensive list of chemicals that cause cancer as well as many other toxicology reports
CDC's National Institute for Occupational Safety and Health (NIOSH) Provide information about exposures in the workplace known or suspected to cause cancer. NIOSH also responds to requests from employers, union representatives, or employees to evaluate potentially hazardous working conditions, including suspected cancer clusters.