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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)

 69 Port Tennant Road, Port Tennant - facade diffusion tube
2005
Oct 2005 40.60 µg/m3
Nov 2005 44.30 µg/m3
Dec 2005 46.20 µg/m3
Average 2005 43.70 µg/m3
2006
Jan 2006 39.70 µg/m3
Feb 2006 38.00 µg/m3
Mar 2006 29.60 µg/m3
Apr 2006 26.50 µg/m3
May 2006 31.20 µg/m3
Jun 2006 26.20 µg/m3
Jul 2006 26.60 µg/m3
Aug 2006 18.60 µg/m3
Sep 2006 29.50 µg/m3
Oct 2006 36.40 µg/m3
Nov 2006 37.00 µg/m3
Dec 2006 38.00 µg/m3
Average 2006 31.44 µg/m3
2007
Jan 2007 32.40 µg/m3
Feb 2007 40.60 µg/m3
Mar 2007 24.40 µg/m3
Apr 2007 30.30 µg/m3
May 2007 25.10 µg/m3
Jun 2007 16.30 µg/m3
Jul 2007 21.10 µg/m3
Aug 2007 23.30 µg/m3
Sep 2007 23.00 µg/m3
Oct 2007 41.80 µg/m3
Nov 2007 44.40 µg/m3
Dec 2007 45.00 µg/m3
Average 2007 30.64 µg/m3
2008
Jan 2008 35.30 µg/m3
Feb 2008 47.30 µg/m3
Mar 2008 27.80 µg/m3
Apr 2008 26.90 µg/m3
May 2008 29.10 µg/m3
Jun 2008 23.20 µg/m3
Jul 2008 23.80 µg/m3
Aug 2008 21.40 µg/m3
Sep 2008 28.20 µg/m3
Oct 2008 34.90 µg/m3
Nov 2008 37.50 µg/m3
Dec 2008 38.30 µg/m3
Average 2008 31.14 µg/m3
2009
Jan 2009 30.90 µg/m3
Feb 2009 37.00 µg/m3
Mar 2009 33.90 µg/m3
Apr 2009 39.20 µg/m3
Average 2009 35.25 µg/m3
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