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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)

 32 Martin Street, Morriston - façade diffusion tube
2012
Jan 2012 52.70 µg/m3
Apr 2012 36.20 µg/m3
May 2012 31.10 µg/m3
Jun 2012 22.90 µg/m3
Jul 2012 26.60 µg/m3
Aug 2012 32.50 µg/m3
Average 2012 33.67 µg/m3