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Index Banded Annual Totals for Swansea:
LOW
99 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)

 87 Midland Place, Llansamlet - facade diffusion tube
2005
Oct 2005 24.00 µg/m3
Nov 2005 31.60 µg/m3
Dec 2005 33.20 µg/m3
Average 2005 29.60 µg/m3
2006
Jan 2006 32.90 µg/m3
Feb 2006 37.10 µg/m3
Mar 2006 27.40 µg/m3
Apr 2006 24.40 µg/m3
May 2006 28.20 µg/m3
Jun 2006 29.30 µg/m3
Jul 2006 32.00 µg/m3
Aug 2006 17.60 µg/m3
Sep 2006 35.50 µg/m3
Oct 2006 34.90 µg/m3
Nov 2006 40.50 µg/m3
Dec 2006 36.90 µg/m3
Average 2006 31.39 µg/m3
2007
Jan 2007 24.50 µg/m3
Feb 2007 33.70 µg/m3
Mar 2007 19.60 µg/m3
Apr 2007 22.70 µg/m3
May 2007 14.80 µg/m3
Jun 2007 16.90 µg/m3
Jul 2007 21.70 µg/m3
Aug 2007 23.20 µg/m3
Sep 2007 23.00 µg/m3
Oct 2007 35.00 µg/m3
Nov 2007 28.90 µg/m3
Average 2007 24.00 µg/m3
2008
Jan 2008 37.50 µg/m3
Feb 2008 34.80 µg/m3
Mar 2008 28.50 µg/m3
Apr 2008 28.60 µg/m3
May 2008 27.60 µg/m3
Jun 2008 19.60 µg/m3
Jul 2008 19.00 µg/m3
Aug 2008 21.80 µg/m3
Sep 2008 26.80 µg/m3
Oct 2008 35.20 µg/m3
Nov 2008 17.50 µg/m3
Dec 2008 36.80 µg/m3
Average 2008 27.81 µg/m3
2009
Jan 2009 36.40 µg/m3
Feb 2009 37.00 µg/m3
Mar 2009 35.40 µg/m3
Apr 2009 35.60 µg/m3
Average 2009 36.10 µg/m3
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