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Index Banded Annual Totals for Swansea:
LOW
16 days
MODERATE
2 days
HIGH
0 days
VERY HIGH
0 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 12/01/2021 00:00 - 18/01/2021 24:00
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 11.67 30.98
Max 48.68 140.78
Sdv 0.72 2.28
Geom. mean 8.70 21.29
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 18/01/2021 18/01/2021
Time of max 09:00:00 09:00:00
Perc:99.8 % 48.68 140.78


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



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