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Index Banded Annual Totals for Swansea:
LOW
195 days
MODERATE
96 days
HIGH
1 day
VERY HIGH
5 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 19/10/2020 00:00 - 25/10/2020 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 11.25 29.05 22.26
Max 35.15 86.31 65.77
Sdv 0.56 1.33 1.28
Geom. mean 8.93 23.91 14.97
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 21/10/2020 22/10/2020 21/10/2020
Time of max 07:00:00 07:00:00 09:00:00
Perc:99.8 % 35.15 86.31 65.77


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



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