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Index Banded Annual Totals for Swansea:
LOW
89 days
MODERATE
68 days
HIGH
1 day
VERY HIGH
13 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 20/06/2017 22:00 - 20/06/2018 22:00
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 11.58 36.97 30.50
Max 61.68 186.04 134.99
Sdv 0.10 0.29 0.21
Geom. mean 7.95 28.03 24.45
Exceedance Limit 105.00 105.00 105.00 200.00 200.00
Exceedance (%) 0.00 0.00 0.00 0.00 0.00
Exceedance Count 0 0 0 0 0
Exceedance (Hours) 0.00 0.00 0.00 0.00 0.00
Date of max 19/01/2018 18/12/2017 18/12/2017
Time of max 08:00:00 17:00:00 16:00:00
Perc:99.8 % 51.61 141.52 103.40


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



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