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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)

 3 Mansel Terrace, Manselton - facade diffusion tube
2012
Jan 2012 56.60 g/m3
Apr 2012 45.20 g/m3
May 2012 33.60 g/m3
Jun 2012 38.80 g/m3
Jul 2012 33.00 g/m3
Aug 2012 31.10 g/m3
Average 2012 39.72 g/m3