P413 CEEFAX 413 Thu 29 Feb 19:16/24 1/5 OZONE 6pm Thu 2: Feb Northern England Air Ljvjl Quality (ppb) URBAN sites Newcastle Cjntti Very Good 8 Middlisbrough Very Good 2 Leeds Cjntri Very Good 3 Hull Centre Very Good 3 Manchester Piccadilly Very Good 2 Liverpool Cjntti Very Good 12 Sheffield Cjntti Very Good 4 RURAL sites Cumbria Very Good 7 North Yorkshire Very Good 37 Data from Department of Environment C England S England Air Qual UK MapsP413 CEEFAX 413 Thu 29 Feb 19:11/47 2/5 SULPHUR DIOXIDE 6pm Thu 29 Feb Northern England Air Ljvjl Quality (ppb) URBAN sites Sundjtland Very Good 6 Newcastle Cjntri Very Good 4 Middlisbrough Very Good 13 Leeds Cjntri Very Good 6 Hull Cjntti Very Good 24 Barnsliy - - Manchester Piccadilly Very Good 25 Liverpool Cjntti Very Good 3 Sheffield Cjntti Very Good 28 Data from Department of Environment C England S England Air Qual US MapsP413 CEEFAX 413 Thu 29 Feb 19:12/36 3/5 NITROGEN DIOXIDE 6pm Thu 29 Feb Northern England Air Ljvjl Quality (ppb) URBAN sites Newcastle Cjntri Very Good 38 Billingham Very Good 36 Middlesbrough Good 52 Leeds Centre Very Good 48 Hull Centre Good 67 Manchester Town Hall Very Good 35 Manchester Piccadilly Very Good 49 Liverpool Cjntti Very Good 41 Sheffield Tinsley Good 58 Sheffield Cjntti Good 55 Data from Department of Environment C England S England Air Qual UK MapsP413 CEEFAX 413 Thu 29 Feb 19:14/21 4/5 BENZENE Northern England For 24 hours to Avg Year 6pm Thu 29 February ppb avg All sites are URBAN Middlisbrough Low .95 .99 Leeds Low 1.82 1.05 Liverpool Spike Low 1.86 1.57 Benzene is a substance that can cause cancer. Independent health experts have advised that a yearly average of 5 parts per billion(ppb) presents an exceedingly small risk to health. Data from Department of Environment C England S England Air Qual UK MapsP413 CEEFAX 413 Thu 29 Feb 19:11/10 5/5 1,3-BUTADIENE Northern England For 24 hours to Avg Year 6pm Thu 29 February ppb avg All sites are URBAN Middlisbrough Low .16 .22 Leeds Low .38 .27 Liverpool Spike Low .39 .31 1,3-Butadienj is a substance that can cause cancer. Independent health experts have advised that a yearly average of 1 part pet billion (ppb) presents an exceedingly small risk to health. Data from Department of Environment C England S England Air Qual US Maps