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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)

 26 Station Road, Penclawdd - facade diffusion tube
2012
Jan 2012 39.20 µg/m3
Apr 2012 25.80 µg/m3
May 2012 32.30 µg/m3
Jun 2012 29.40 µg/m3
Jul 2012 27.00 µg/m3
Aug 2012 31.20 µg/m3
Average 2012 30.82 µg/m3