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Index Banded Annual Totals for Swansea:
LOW
82 days
MODERATE
44 days
HIGH
11 days
VERY HIGH
8 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 25/05/2016 08:00 - 25/05/2017 08:00
Integration time : 1.0 Hours, Observation limit :1
  Swansea AURN Morriston Morfa Hafod DOAS St Thomas DOAS
  [ppb] [ppb] [ppb] [ug/m3] [ug/m3]
Mean 13.85 16.16 45.78 35.92
Max 85.73 92.77 261.50 146.39
Sdv 0.11 0.13 0.34 0.22
Geom. mean 9.90 12.63 35.25 30.48
Exceedance Limit 105.00 105.00 105.00 200.00 200.00
Exceedance (%) 0.00 0.00 0.00 0.07 0.00
Exceedance Count 0 0 0 6 0
Exceedance (Hours) 0.00 0.00 0.00 6.00 0.00
Date of max 01/12/2016 07/02/2017 30/11/2016 01/12/2016
Time of max 17:00:00 08:00:00 17:00:00 18:00:00
Perc:99.8 % 62.74 69.04 178.72 119.65


All data supplied are non-validated and for information only.



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