MENDIP
CARDIFF
NEWPORT
CAERPHILLY
PURBECK
SALISBURY
PORTLAND
EAST DEVON WEST DORSET
THE VALE OF GLAMORGAN
SEDGEMOOR
NORTH WILTSHIRE
NORTH DORSETMID DEVON
WEST SOMERSET
SOUTH SOMERSET
RHONDDA, CYNON, TAFF
BATH AND NORTH EAST SOMERSET
WILTSHIRE
EAST DORSET
NORTH SOMERSET
BRIDGEND
POOLE
WEYMOUTH AND PORTLAND
CITY OF BRISTOL
Bath
PooleExeter
SwindonNewport
CardiffBristol
Bournemouth
Weston-Super-Mare
Risca
Frome
CalneBarry
Yeovil
Taunton
Penarth Nailsea
Exmouth
Dursley
Devizes
Dawlish
Cwmbran
Corsham
Bargoed
Weymouth
Tiverton
Sidmouth
Ringwood
Radstock
Minehead
MelkshamKeynsham
Ferndown
Clevedon
Caldicot
Bridport
Bridgend
Salisbury
Pontypool
Wellington
Warminster
Trowbridge
Teignmouth
Portishead
Pontypridd
Highbridge
Dorchester
Chippenham
Caerphilly
Bridgwater
Burnham-on-Sea
Chipping Sodbury
Chard
Watchet
Cheddar
Wincanton
Llanharan
Malmesbury
Lyme Regis
Blandford Forum
Pitt
Beer
Beer
Wales
Luton
Luton
Kenny
Wookey
Stroat
SemleyPetton
Newton
Maendy
Bagber
Weycroft
St Athan
Batcombe
Batcombe
Tockington
The shading indicates the maximum requirements for radon protective measures in any location within each 1-km grid square to satisfy the guidance in Building Regulations Approved Document C. The requirement for an existing building with a valid postal address can be obtained for a small charge from www.ukradon.org. The requirement for a site without a postal address is available through the British Geological Survey GeoReports service, http://shop.bgs.ac.uk/GeoReports/.
Map 3 Dorset, Somerset, Wiltshire and the Bristol Channel, 100-km grid squares ST and SY (axis numbers are the coordinates of the National Grid)
Level of protection requiredNoneBasicFull
SettlementsBathWeymouthWatchet
Semley
National Grid100-km 10-km
Other FeaturesLOCAL ADMINISTRATIVE DISTRICT
Water features
RoadsMotorwaysPrimary RoadsA RoadsB Roads
380340 360 400
100
320300
© Crown copyright. All rights reserved [Health Protection Agency][100016969][2007]
80120
140160
180200
Radon potential classification © Health Protection Agency and British Geological Survey copyright [2007]
