Maps Where can I obtain maps showing the areas of the country affected by radon. The HPA (NRPB) publish a range of maps and reports providing radon risk estimates across the UK. Some of these maps can be obtained from the BRE Bookshop. Where can I find maps to determine whether or not I need to provide radon protective measures within a new house? Maps are contained within BRE Report BR211 Radon: Guidance on Protective measures for new dwellings available from the BRE Bookshop. Measurement How long do I need to test for ? In order to eliminate any short term effects caused by changes in weather conditions it is recommended that you should  test over a period of several months. Typically a three month test is recommended. Short term tests over 7-8 days are available for screening purposes for checking radon levels after installation of remedial measures or for checking properties prior to purchase. It is usually advisable to confirm short term results with a long term test. Instantaneous measurement equipment is available but results require expert analysis and is really only of use to specialist contractors.HPA can advise further on measurement protocols Who do I contact in order to have my house tested for radon? For an upto date list of validated laboratories contactHPA. A further list of companies providing measurement services can also be obtained from The Radon Council Limited. Radon in the Workplace Am I exposed to radon at work? Radon concentrations in workplace buildings can also reach quite high levels. You should discuss the matter with your employer and ask them to contact the Health and Safety Executive orHPA for advice on the need for measurements. I am an employer. Do I need to measure the exposure of my employees? The Ionising Radiations Regulations 1999 impose a duty on employers to protect workers from exposure to radon. You should contact the local HSE area office or the Environmental Health Department of your local council (whichever you normally deal with for health and safety matters) for advice on whether the regulations are likely to affect your business. Further guidance is available in BRE Report BR293 Radon in the workplace. If you would like to speak to somebody about radon in the first instance please phone the Health Protection Agency Radon Hotline on 01235 822622. Arron Perry | May 2005 | © copyright BRE 2000