Ionizing Radiation Standards, Canadian Institute for National Measurement Standards
As Canada's primary centre of reference for the accuracy, validity and traceability of physical and chemical measurements, NRC-INMS anchors the national measurement system and provides a fundamental technical infrastructure that supports Canadian industry and the Canadian public.
http://inms-ienm.nrc-cnrc.gc.ca/research/ionizing_radiation_e.html

Radiation Safety Network
Home page for the Radiation Safety Network. The site is designed to assist radiation safety officers and radiation users in complying with radiation regulatory requirements.
http://www.radiationsafety.net/

International Radiation Protection Association
IRPA - International Radiation Protection Association
http://www.irpa.net/

Glosrad Radiation Protection Service
GLOSRAD, the Radiation Protection Service forms part of the Medical Physics Department of Gloucestershire Hospitals NHS trust
http://www.glosrad.co.uk

Swedish Radiation Protection Institute
Government authority with the task of protecting people and the environment from the harmful effects of radiation. News and information on public and worker radiation exposure.
http://www.ssi.se/english/lank_symbol_Eng.html

National Council on Radiation Protection and Measurements
NCRP's mission is to help disseminate information and research data about radiation exposure and protection guidelines in the public interest.
http://www.ncrponline.org

Radiation Safety Solutions
Radiation Protection Advisers for meeting UK regulatory requirements, such as IRR99 and RSA93, and achieving radiation safety in general.
http://www.ionising.com

Useful Radiation Safety Sites and References
Useful websites and references in radiation safety - provided by Radiation Safety Solutions
http://www.radiation.org.uk/

Radiation Information Network
Web site for information on Radiation and its effects.
http://www.physics.isu.edu/radinf/index.html

Atmospheric Radiation Measurement (ARM) Program
The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy (DOE).
http://www.arm.gov/