Haverhill Aldham Ipswich Sudbury Royston Ridgewell 0 BABERGH 4 Saffron Walden 2 Felixstowe Harwich
BRAINTREE UTTLESFORD Aldham Colchester Braintree TENDRING Bishop's Stortford
0 EAST HERTFORDSHIRE 2 2 Tonwell Clacton-on-Sea
Harlow Chelmsford
CHELMSFORD MALDON BROXBOURNE EPPING FOREST 0 0 2
ENFIELD BRENTWOOD
Brentwood Basildon ROCHFORD BASILDON HARINGEY REDBRIDGE Southend-on-Sea HAVERING HACKNEY CASTLE POINT
8 THURROCK 1 SOUTHWARK Gravesend BEXLEY LEWISHAM DARTFORD Margate MEDWAY GRAVESHAM Reculver
Rochester Chatham BROMLEY THANET CROYDON SWALE Preston 0
6 Otford
1 Canterbury Sevenoaks Maidstone Tong Oxted Deal MAIDSTONE DOVER TANDRIDGE Tonbridge
Horley Ashford Dover
0 Tunbridge Wells
4 ASHFORD
1 East Grinstead Folkestone TUNBRIDGE WELLS Hythe Tenterden Crowborough SHEPWAY
MID SUSSEX Burwash Old Romney Uckfield
0 Rye
2 Burgess Hill WEALDEN 1 ROTHER
Lewes HASTINGS 540 560 580 600 620 640 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/.
Level of protection required Settlements Roads National Grid
None Chelmsford Motorways 100-km 10-km
Basic Primary Roads Other Features Hythe Full A Roads LOCAL ADMINISTRATIVE DISTRICT Aveley B Roads Water features Aldham
Map 6 Essex, Thames estuary and east Kent, 100-km grid squares TM and TR (axis numbers are the coordinates of the National Grid) © Crown copyright. All rights reserved [Health Protection Agency][100016969][2007] Radon potential classification © Health Protection Agency and British Geological Survey copyright [2007]