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Index Banded Annual Totals for Swansea:
LOW
117 days
MODERATE
92 days
HIGH
2 days
VERY HIGH
19 days

Exceedences

Nitrogen Dioxide Exceedences
Total period : 18/08/2017 04:00 - 18/08/2018 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 11.85 37.53 31.65
Max 61.68 186.04 134.99
Sdv 0.10 0.28 0.20
Geom. mean 8.36 28.69 25.90
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 19/01/2018 18/12/2017 18/12/2017
Time of max 08:00:00 17:00:00 16:00:00
Perc:99.8 % 51.86 141.61 103.40


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



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