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Index Banded Annual Totals for Swansea:
LOW
92 days
MODERATE
85 days
HIGH
1 day
VERY HIGH
7 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 28/06/2020 17:00 - 05/07/2020 17:00
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 3.58 5.71 21.52
Max 10.37 36.90 35.63
Sdv 0.14 0.46 0.36
Geom. mean 3.19 4.82 21.05
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 30/06/2020 30/06/2020 30/06/2020
Time of max 11:00:00 11:00:00 07:00:00
Perc:99.8 % 10.37 36.90 35.63


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



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