The information available is in respect of the strategic health authority (SHA) boundaries which obtained prior to 1 July 2007. The table shows the 10 such SHAs in which fluoridation schemes apply and the proportion of their populations estimated to be benefiting from receipt of fluoridated water. Fluoridation was introduced progressively to these areas over the period 1964 to 1988.
SHA area (up to 30 June 2007) Percentage of total population fluoridated Bedfordshire and Hertfordshire 12 Birmingham and the Black Country 97 Cheshire and Merseyside 14 County Durham and Tees Valley 20 Cumbria and Lancashire 6 North and East Yorkshire and Northern Lincolnshire 8 Northumberland, Tyne and Wear 47 Shropshire and Staffordshire 35 Trent 21 West Midlands South 62