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Index Banded Annual Totals for Swansea:
LOW
42 days
MODERATE
5 days
HIGH
0 days
VERY HIGH
4 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 13/02/2024 07:00 - 20/02/2024 07:00
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 8.46 35.95 17.66
Max 27.34 111.94 58.47
Sdv 0.72 1.89 1.04
Geom. mean 5.82 27.20 13.51
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 13/02/2024 17/02/2024 15/02/2024
Time of max 11:00:00 04:00:00 17:00:00
Perc:99.8 % 27.34 111.94 58.47


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



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