HC Deb 28 February 1990 vol 168 c189W
Mr. Matthew Taylor

To ask the Secretary of State for the Environment what percentage of properties surveyed by the National Radiological Protection Board in each Cornwall district is over the newly declared safety level; and whether the owners of those properties have been informed of the new safety advice.

Mr. Heathcoat-Amory

The percentage of private and council houses surveyed by the National Radiological Protection Board (NRPB) in each Cornwall district with radon concentrations above the new action level are as follows:

Percentage
Caradon 27
Carrick 23
Kerrier 45
North Cornwall 34
Penwith 42
Restormel 27

The NRPB is writing to all householders whose survey revealed concentrations of between 200 and 400 bq m —3 to inform them of the change in the action level.