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

Exceedences

Nitrogen Dioxide Exceedences
Total period : 11/08/2019 17:00 - 18/08/2019 17:00
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 3.97 12.15 18.77
Max 11.39 57.55 53.23
Sdv 0.20 1.38 0.73
Geom. mean 3.08 9.74 16.02
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 13/08/2019 12/08/2019 13/08/2019
Time of max 07:00:00 21:00:00 00:00:00
Perc:99.8 % 11.39 57.55 53.23


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



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