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Index Banded Annual Totals for Swansea:
LOW
98 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)

 4 Ian's Walk, Ynysforgan - facade diffusion tube
2005
Oct 2005 36.40 µg/m3
Nov 2005 35.60 µg/m3
Dec 2005 39.90 µg/m3
Average 2005 37.30 µg/m3
2006
Jan 2006 38.00 µg/m3
Feb 2006 35.40 µg/m3
Mar 2006 30.70 µg/m3
Apr 2006 33.50 µg/m3
May 2006 34.40 µg/m3
Jun 2006 32.40 µg/m3
Jul 2006 32.70 µg/m3
Aug 2006 22.10 µg/m3
Sep 2006 35.10 µg/m3
Oct 2006 36.50 µg/m3
Nov 2006 41.60 µg/m3
Dec 2006 39.80 µg/m3
Average 2006 34.35 µg/m3
2007
Jan 2007 35.20 µg/m3
Feb 2007 39.90 µg/m3
Mar 2007 25.80 µg/m3
Apr 2007 35.60 µg/m3
May 2007 30.20 µg/m3
Jun 2007 27.10 µg/m3
Jul 2007 24.80 µg/m3
Aug 2007 26.50 µg/m3
Sep 2007 25.90 µg/m3
Oct 2007 39.20 µg/m3
Nov 2007 37.00 µg/m3
Dec 2007 42.50 µg/m3
Average 2007 32.48 µg/m3
2008
Jan 2008 45.20 µg/m3
Feb 2008 48.90 µg/m3
Mar 2008 35.60 µg/m3
Apr 2008 32.30 µg/m3
May 2008 27.80 µg/m3
Jun 2008 29.60 µg/m3
Jul 2008 31.00 µg/m3
Aug 2008 32.30 µg/m3
Sep 2008 31.20 µg/m3
Oct 2008 40.20 µg/m3
Nov 2008 35.70 µg/m3
Dec 2008 40.20 µg/m3
Average 2008 35.83 µg/m3
2009
Jan 2009 35.90 µg/m3
Feb 2009 45.90 µg/m3
Mar 2009 44.20 µg/m3
Apr 2009 44.80 µg/m3
Average 2009 42.70 µg/m3
2012
Jan 2012 43.90 µg/m3
Apr 2012 23.80 µg/m3
May 2012 22.80 µg/m3
Jun 2012 29.60 µg/m3
Jul 2012 23.70 µg/m3
Aug 2012 27.20 µg/m3
Average 2012 28.50 µg/m3
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