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Index Banded Annual Totals for Swansea:
LOW
108 days
MODERATE
10 days
HIGH
1 day
VERY HIGH
5 days

Diffusion Tubes - Nitrogen Dioxide (NO2)

 1123 Carmarthen Road - facade diffusion tube
2008
Jul 2008 24.30 µg/m3
Aug 2008 23.10 µg/m3
Sep 2008 30.10 µg/m3
Oct 2008 36.60 µg/m3
Nov 2008 22.10 µg/m3
Dec 2008 50.40 µg/m3
Average 2008 31.10 µg/m3
2009
Jan 2009 56.90 µg/m3
Feb 2009 35.40 µg/m3
Mar 2009 44.30 µg/m3
Apr 2009 37.60 µg/m3
Average 2009 43.55 µg/m3
2012
Jan 2012 43.40 µg/m3
Apr 2012 29.90 µg/m3
May 2012 26.70 µg/m3
Jun 2012 22.00 µg/m3
Jul 2012 20.90 µg/m3
Aug 2012 22.50 µg/m3
Average 2012 27.57 µg/m3