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

Diffusion Tubes - Nitrogen Dioxide (NO2)

 24 Delhi Street, St.Thomas - facade diffusion tube
2005
Oct 2005 38.90 µg/m3
Nov 2005 54.20 µg/m3
Dec 2005 52.50 µg/m3
Average 2005 48.53 µg/m3
2006
Jan 2006 43.10 µg/m3
Feb 2006 42.70 µg/m3
Mar 2006 39.60 µg/m3
Apr 2006 38.30 µg/m3
May 2006 33.90 µg/m3
Jun 2006 30.50 µg/m3
Aug 2006 32.00 µg/m3
Sep 2006 31.80 µg/m3
Oct 2006 44.20 µg/m3
Dec 2006 43.70 µg/m3
Average 2006 37.98 µg/m3
2007
Jan 2007 39.60 µg/m3
Feb 2007 47.80 µg/m3
Mar 2007 37.40 µg/m3
Apr 2007 36.30 µg/m3
May 2007 29.00 µg/m3
Jun 2007 29.60 µg/m3
Jul 2007 28.40 µg/m3
Aug 2007 31.70 µg/m3
Sep 2007 33.10 µg/m3
Oct 2007 46.50 µg/m3
Nov 2007 58.50 µg/m3
Dec 2007 51.40 µg/m3
Average 2007 39.11 µg/m3
2008
Jan 2008 45.20 µg/m3
Feb 2008 56.50 µg/m3
Mar 2008 33.90 µg/m3
Apr 2008 35.90 µg/m3
May 2008 35.50 µg/m3
Jun 2008 20.30 µg/m3
Jul 2008 31.60 µg/m3
Aug 2008 28.30 µg/m3
Sep 2008 34.20 µg/m3
Oct 2008 42.80 µg/m3
Nov 2008 47.40 µg/m3
Dec 2008 47.10 µg/m3
Average 2008 38.23 µg/m3
2009
Jan 2009 38.00 µg/m3
Feb 2009 47.20 µg/m3
Mar 2009 37.40 µg/m3
Apr 2009 42.20 µg/m3
Average 2009 41.20 µg/m3
2012
Jan 2012 50.40 µg/m3
Apr 2012 32.90 µg/m3
May 2012 23.90 µg/m3
Jun 2012 24.20 µg/m3
Jul 2012 19.40 µg/m3
Aug 2012 26.70 µg/m3
Average 2012 29.58 µg/m3
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