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Index Banded Annual Totals for Swansea:
LOW
103 days
MODERATE
20 days
HIGH
1 day
VERY HIGH
5 days
annual air quality totals for all Swansea monitoring stations

Diffusion Tubes - Nitrogen Dioxide (NO2)

 2 Sebastopol Street, St.Thomas - facade diffusion tube
2005
Oct 2005 39.00 µg/m3
Nov 2005 39.00 µg/m3
Dec 2005 43.80 µg/m3
Average 2005 40.60 µg/m3
2006
Jan 2006 36.60 µg/m3
Feb 2006 35.10 µg/m3
Mar 2006 26.30 µg/m3
Apr 2006 27.80 µg/m3
May 2006 28.50 µg/m3
Jun 2006 25.40 µg/m3
Jul 2006 20.70 µg/m3
Aug 2006 20.40 µg/m3
Sep 2006 32.20 µg/m3
Oct 2006 35.00 µg/m3
Nov 2006 37.20 µg/m3
Dec 2006 34.20 µg/m3
Average 2006 29.95 µg/m3
2007
Jan 2007 29.50 µg/m3
Feb 2007 44.90 µg/m3
Mar 2007 25.80 µg/m3
May 2007 23.80 µg/m3
Jun 2007 29.50 µg/m3
Jul 2007 18.40 µg/m3
Aug 2007 17.20 µg/m3
Sep 2007 24.00 µg/m3
Oct 2007 42.30 µg/m3
Nov 2007 38.80 µg/m3
Dec 2007 41.10 µg/m3
Average 2007 30.48 µg/m3
2008
Jan 2008 31.70 µg/m3
Feb 2008 45.40 µg/m3
Mar 2008 28.90 µg/m3
Apr 2008 27.90 µg/m3
May 2008 28.20 µg/m3
Jun 2008 20.70 µg/m3
Jul 2008 23.80 µg/m3
Aug 2008 21.80 µg/m3
Sep 2008 27.60 µg/m3
Oct 2008 31.00 µg/m3
Nov 2008 35.30 µg/m3
Dec 2008 36.00 µg/m3
Average 2008 29.86 µg/m3
2009
Jan 2009 31.30 µg/m3
Feb 2009 38.40 µg/m3
Mar 2009 33.00 µg/m3
Apr 2009 35.50 µg/m3
Average 2009 34.55 µg/m3
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