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Index Banded Annual Totals for Swansea:
LOW
130 days
MODERATE
40 days
HIGH
1 day
VERY HIGH
5 days

Diffusion Tubes - Nitrogen Dioxide (NO2)

 72 Courtney Street, Manselton - facade diffusion tube
2012
Jan 2012 38.50 g/m3
Apr 2012 27.10 g/m3
May 2012 22.10 g/m3
Jun 2012 19.70 g/m3
Jul 2012 16.00 g/m3
Aug 2012 13.40 g/m3
Average 2012 22.80 g/m3