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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)

 1068 Carmarthen Road - facade diffusion tube
2008
Jul 2008 33.40 µg/m3
Aug 2008 25.30 µg/m3
Sep 2008 42.30 µg/m3
Oct 2008 46.10 µg/m3
Nov 2008 47.40 µg/m3
Dec 2008 58.20 µg/m3
Average 2008 42.12 µg/m3
2009
Jan 2009 46.30 µg/m3
Feb 2009 57.40 µg/m3
Mar 2009 50.40 µg/m3
Apr 2009 56.10 µg/m3
Average 2009 52.55 µg/m3
2012
Jan 2012 55.70 µg/m3
Apr 2012 38.30 µg/m3
May 2012 36.80 µg/m3
Jun 2012 29.20 µg/m3
Jul 2012 28.40 µg/m3
Aug 2012 29.00 µg/m3
Average 2012 36.23 µg/m3