[holding answer 8 March 2007]: No specific data on carbon monoxide levels are available at local authority levels.
Combustion safety in buildings is covered by Part J, Combustion appliances and fuel storage systems, of the Building Regulations. Gas installation is further covered by the Gas Safety (Installation and Use) Regulations. These set out the standards and precautions that should be taken when installing combustion appliances.
General accident statistics have shown that there has been an upward trend in low level (non fatal) carbon monoxide poisoning but it is not clear whether this is due to better diagnosis or other issues. The Department of Health issues regular guidance to general practitioners on the symptoms and effects of carbon monoxide poisoning.