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

Diffusion Tubes - Nitrogen Dioxide (NO2)

 63 Wern fawr Road, Port Tennant - facade diffusion tube
2005
Oct 2005 23.20 µg/m3
Nov 2005 26.10 µg/m3
Dec 2005 29.30 µg/m3
Average 2005 26.20 µg/m3
2006
Jan 2006 28.50 µg/m3
Feb 2006 23.60 µg/m3
Mar 2006 20.80 µg/m3
Apr 2006 16.80 µg/m3
May 2006 18.00 µg/m3
Jun 2006 17.10 µg/m3
Jul 2006 15.10 µg/m3
Aug 2006 10.10 µg/m3
Sep 2006 17.00 µg/m3
Oct 2006 23.20 µg/m3
Nov 2006 25.30 µg/m3
Average 2006 19.59 µg/m3
2007
Jan 2007 12.90 µg/m3
Feb 2007 26.00 µg/m3
Mar 2007 15.40 µg/m3
Apr 2007 19.90 µg/m3
May 2007 13.80 µg/m3
Jun 2007 13.80 µg/m3
Jul 2007 12.40 µg/m3
Aug 2007 13.30 µg/m3
Sep 2007 15.30 µg/m3
Oct 2007 28.50 µg/m3
Nov 2007 30.00 µg/m3
Dec 2007 29.50 µg/m3
Average 2007 19.23 µg/m3
2008
Jan 2008 20.90 µg/m3
Feb 2008 27.30 µg/m3
Mar 2008 21.30 µg/m3
Apr 2008 18.60 µg/m3
May 2008 18.00 µg/m3
Jun 2008 13.14 µg/m3
Jul 2008 14.90 µg/m3
Aug 2008 13.00 µg/m3
Sep 2008 19.70 µg/m3
Oct 2008 20.50 µg/m3
Nov 2008 23.60 µg/m3
Dec 2008 26.20 µg/m3
Average 2008 19.76 µg/m3
2009
Jan 2009 27.50 µg/m3
Feb 2009 27.60 µg/m3
Mar 2009 21.70 µg/m3
Apr 2009 20.70 µg/m3
Average 2009 24.38 µg/m3
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