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Index Banded Annual Totals for Swansea:
LOW
93 days
MODERATE
18 days
HIGH
1 day
VERY HIGH
4 days

Diffusion Tubes - Nitrogen Dioxide (NO2)

 114 Gower Road - facade diffusion tube
2008
Jul 2008 28.40 µg/m3
Aug 2008 21.40 µg/m3
Sep 2008 40.80 µg/m3
Oct 2008 37.70 µg/m3
Nov 2008 36.40 µg/m3
Dec 2008 46.90 µg/m3
Average 2008 35.27 µg/m3
2009
Jan 2009 50.80 µg/m3
Feb 2009 49.40 µg/m3
Mar 2009 40.90 µg/m3
Apr 2009 35.30 µg/m3
Average 2009 44.10 µg/m3
2012
Jan 2012 46.10 µg/m3
Apr 2012 32.90 µg/m3
May 2012 37.30 µg/m3
Jun 2012 27.00 µg/m3
Jul 2012 24.40 µg/m3
Aug 2012 24.70 µg/m3
Average 2012 32.07 µg/m3