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Index Banded Annual Totals for Swansea:
LOW
65 days
MODERATE
21 days
HIGH
0 days
VERY HIGH
4 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 23/03/2020 04:00 - 30/03/2020 04:00
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 12.98 30.44 37.14
Max 41.38 107.94 105.50
Sdv 0.62 1.81 1.72
Geom. mean 10.42 20.92 31.53
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 25/03/2020 25/03/2020 24/03/2020
Time of max 20:00:00 19:00:00 03:00:00
Perc:99.8 % 41.38 107.94 105.50


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



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