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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)

 1st Floor 18/20 Vivian Road - facade diffusion tube
2012
Jan 2012 44.80 µg/m3
Apr 2012 29.10 µg/m3
May 2012 36.00 µg/m3
Jun 2012 33.10 µg/m3
Jul 2012 24.80 µg/m3
Aug 2012 29.80 µg/m3
Average 2012 32.93 µg/m3