§ Norman BakerTo ask the Secretary of State for Environment, Food and Rural Affairs what the trends have been since 1997 in respect of the concentration of aluminium powder in air. [179457]
§ Alun MichaelDefra monitors ambient aluminium concentrations at three locations: Chilton, Oxfordshire; Styrrup, Yorkshire; and Wraymires, Cumbria. The following table shows annual mean air concentrations from 1997 to 2002 (the latest year that data are available). Details of the monitoring data are available in reports published on Defra's Air Quality Archive at www.airquality.co.uk.
Annual mean air concentration of aluminium (ng m-3) Chilton Styrrup Wraymires 1997 110 145 54 1998 92 137 58 1999 68 110 67 2000 100 140 49 2001 76 110 42 2002 82 120 40