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Index Banded Annual Totals for Swansea:
LOW
93 days
MODERATE
18 days
HIGH
1 day
VERY HIGH
4 days
annual air quality totals for all Swansea monitoring stations

Diffusion Tubes - Nitrogen Dioxide (NO2)

 50 Delhi Street, St.Thomas - facade diffusion tube
2005
Nov 2005 56.20 µg/m3
Dec 2005 55.80 µg/m3
Average 2005 56.00 µg/m3
2006
Jan 2006 55.00 µg/m3
Feb 2006 53.00 µg/m3
Mar 2006 42.30 µg/m3
Apr 2006 44.70 µg/m3
May 2006 46.70 µg/m3
Jun 2006 42.40 µg/m3
Jul 2006 41.80 µg/m3
Aug 2006 30.90 µg/m3
Sep 2006 43.00 µg/m3
Oct 2006 51.30 µg/m3
Nov 2006 54.80 µg/m3
Dec 2006 31.70 µg/m3
Average 2006 44.80 µg/m3
2007
Jan 2007 43.20 µg/m3
Feb 2007 42.60 µg/m3
Mar 2007 36.80 µg/m3
Apr 2007 46.30 µg/m3
May 2007 38.40 µg/m3
Jun 2007 40.60 µg/m3
Jul 2007 30.80 µg/m3
Aug 2007 40.30 µg/m3
Sep 2007 38.20 µg/m3
Oct 2007 55.50 µg/m3
Nov 2007 60.00 µg/m3
Dec 2007 60.30 µg/m3
Average 2007 44.42 µg/m3
2008
Jan 2008 52.90 µg/m3
Feb 2008 60.10 µg/m3
Mar 2008 47.10 µg/m3
Apr 2008 46.20 µg/m3
May 2008 42.90 µg/m3
Jun 2008 36.50 µg/m3
Jul 2008 36.80 µg/m3
Aug 2008 37.00 µg/m3
Sep 2008 40.60 µg/m3
Oct 2008 48.80 µg/m3
Nov 2008 37.50 µg/m3
Dec 2008 44.80 µg/m3
Average 2008 44.27 µg/m3
2009
Jan 2009 55.30 µg/m3
Feb 2009 57.70 µg/m3
Mar 2009 43.20 µg/m3
Average 2009 52.07 µg/m3
2012
Jan 2012 47.70 µg/m3
Apr 2012 32.70 µg/m3
May 2012 32.40 µg/m3
Jun 2012 30.20 µg/m3
Jul 2012 31.10 µg/m3
Aug 2012 26.60 µg/m3
Average 2012 33.45 µg/m3
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