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Index Banded Annual Totals for Swansea:
LOW
69 days
MODERATE
5 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 Mar 2024 03:00
Measurement Current Value Highest Reading Date and Time of
Highest Reading
NO 1.25 µg/m3 31.01 µg/m3 18/03/2024 10:00 
NO2 13.53 µg/m3 61.36 µg/m3 18/03/2024 05:00 
O3 75.64 µg/m3 81.12 µg/m3 17/03/2024 15:00 
Benzene 4.22 µg/m3 4.87 µg/m3 17/03/2024 06:00 
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.