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Index Banded Annual Totals for Swansea:
LOW
59 days
MODERATE
53 days
HIGH
1 day
VERY HIGH
0 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 16/04/2019 10:00 - 23/04/2019 10:00
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 21.11 51.96 46.10
Max 50.86 123.17 115.60
Sdv 0.64 1.77 1.64
Geom. mean 19.61 47.08 41.55
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 19/04/2019 19/04/2019 19/04/2019
Time of max 20:00:00 19:00:00 04:00:00
Perc:99.8 % 50.86 123.17 115.60


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



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