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Index Banded Annual Totals for Swansea:
LOW
130 days
MODERATE
40 days
HIGH
1 day
VERY HIGH
5 days

Diffusion Tubes - Nitrogen Dioxide (NO2)

 13 Nantyffin Road - facade diffusion tube
2008
Jul 2008 27.80 g/m3
Aug 2008 32.60 g/m3
Sep 2008 37.60 g/m3
Oct 2008 38.80 g/m3
Nov 2008 44.10 g/m3
Dec 2008 50.20 g/m3
Average 2008 38.52 g/m3
2009
Jan 2009 50.90 g/m3
Feb 2009 54.40 g/m3
Mar 2009 34.80 g/m3
Apr 2009 40.40 g/m3
Average 2009 45.13 g/m3
2012
Jan 2012 47.40 g/m3
Jun 2012 28.00 g/m3
Jul 2012 24.40 g/m3
Aug 2012 26.00 g/m3
Average 2012 31.45 g/m3