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Index Banded Annual Totals for Swansea:
LOW
43 days
MODERATE
7 days
HIGH
0 days
VERY HIGH
1 day

Exceedences

Nitrogen Dioxide Exceedences
Total period : 13/02/2019 03:00 - 20/02/2019 03:00
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 15.12 52.85 36.53
Max 42.97 124.62 99.87
Sdv 0.80 2.04 1.73
Geom. mean 10.86 45.04 29.69
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 14/02/2019 13/02/2019 14/02/2019
Time of max 19:00:00 19:00:00 20:00:00
Perc:99.8 % 42.97 124.62 99.87


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



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