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Index Banded Annual Totals for Swansea:
LOW
95 days
MODERATE
10 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 19 Apr 2024 23:00
Measurement Current Value Highest Reading Date and Time of
Highest Reading
NO 20.44 µg/m3 51.00 µg/m3 18/04/2024 08:00 
NO2 31.68 µg/m3 74.17 µg/m3 18/04/2024 06:00 
O3 49.19 µg/m3 95.41 µg/m3 19/04/2024 15:00 
Benzene 2.17 µg/m3 5.45 µg/m3 18/04/2024 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.