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

Exceedences

Nitrogen Dioxide Exceedences
Total period : 05/12/2018 14:00 - 12/12/2018 14:00
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 11.66 31.74 33.77
Max 51.32 147.97 117.96
Sdv 0.84 2.26 1.75
Geom. mean 6.85 18.59 25.78
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 10/12/2018 10/12/2018 10/12/2018
Time of max 16:00:00 18:00:00 18:00:00
Perc:99.8 % 51.32 147.97 117.96


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



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