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Index Banded Annual Totals for Swansea:
LOW
51 days
MODERATE
11 days
HIGH
1 day
VERY HIGH
4 days

Current Readings for Hafod OPSIS DOAS: air quality data

Monitoring station: Hafod OPSIS DOAS
Last updated: GMT 08 Mar 2021 07:00
Measurement Current Value Highest Reading Date and Time of
Highest Reading
NO 141.31 g/m3 141.31 g/m3 08/03/2021 07:00 
NO2 66.53 g/m3 102.15 g/m3 06/03/2021 20:00 
O3 60.56 g/m3 99.34 g/m3 06/03/2021 14:00 
Benzene 1.27 g/m3 5.47 g/m3 06/03/2021 20:00 
Current Value = The hourly average
Highest Reading = Highest hourly average within the last 24 hour period

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