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Index Banded Annual Totals for Swansea:
LOW
111 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)

 Stewart Hall, Gower Road - facade diffusion tube
2007
Nov 2007 42.40 µg/m3
Dec 2007 42.80 µg/m3
Average 2007 42.60 µg/m3
2008
Jan 2008 30.50 µg/m3
Feb 2008 48.30 µg/m3
Mar 2008 29.50 µg/m3
Apr 2008 30.40 µg/m3
May 2008 41.30 µg/m3
Jun 2008 21.20 µg/m3
Jul 2008 23.40 µg/m3
Aug 2008 19.80 µg/m3
Sep 2008 37.30 µg/m3
Oct 2008 26.70 µg/m3
Nov 2008 35.70 µg/m3
Dec 2008 42.00 µg/m3
Average 2008 32.17 µg/m3
2009
Jan 2009 36.40 µg/m3
Feb 2009 40.70 µg/m3
Mar 2009 35.10 µg/m3
Average 2009 37.40 µg/m3
2012
Jan 2012 37.90 µg/m3
Apr 2012 23.00 µg/m3
May 2012 25.70 µg/m3
Jun 2012 21.40 µg/m3
Jul 2012 16.80 µg/m3
Aug 2012 20.00 µg/m3
Average 2012 24.13 µg/m3
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