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Index Banded Annual Totals for Swansea:
LOW
98 days
MODERATE
19 days
HIGH
1 day
VERY HIGH
5 days

Diffusion Tubes - Nitrogen Dioxide (NO2)

 51 Bathurst Street - facade diffusion tube
2008
Jul 2008 25.50 µg/m3
Aug 2008 24.70 µg/m3
Sep 2008 33.70 µg/m3
Oct 2008 33.90 µg/m3
Nov 2008 20.30 µg/m3
Dec 2008 39.20 µg/m3
Average 2008 29.55 µg/m3
2009
Jan 2009 41.00 µg/m3
Feb 2009 41.40 µg/m3
Mar 2009 37.60 µg/m3
Apr 2009 41.60 µg/m3
Average 2009 40.40 µg/m3
2012
Jan 2012 42.10 µg/m3
Apr 2012 24.90 µg/m3
May 2012 23.50 µg/m3
Jun 2012 20.70 µg/m3
Jul 2012 18.90 µg/m3
Aug 2012 18.20 µg/m3
Average 2012 24.72 µg/m3