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Index Banded Annual Totals for Swansea:
LOW
99 days
MODERATE
19 days
HIGH
1 day
VERY HIGH
5 days
annual air quality totals for all Swansea monitoring stations

Diffusion Tubes - Nitrogen Dioxide (NO2)

 Graham Evans Solicitors, Christina Street - facade diffusion tube
2008
Jul 2008 30.40 µg/m3
Aug 2008 31.80 µg/m3
Sep 2008 46.10 µg/m3
Oct 2008 41.80 µg/m3
Nov 2008 53.60 µg/m3
Dec 2008 58.20 µg/m3
Average 2008 43.65 µg/m3
2009
Jan 2009 42.30 µg/m3
Feb 2009 55.60 µg/m3
Mar 2009 41.10 µg/m3
Apr 2009 48.00 µg/m3
Average 2009 46.75 µg/m3
2012
May 2012 39.50 µg/m3
Jun 2012 28.10 µg/m3
Jul 2012 28.20 µg/m3
Aug 2012 32.50 µg/m3
Average 2012 32.08 µg/m3
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