To see the current readings from any of our monitoring stations, please select the appropriate criteria on the right.
Please note that readings for the current month (and graphs and tables based on them) are unratified. Data before the current month have been scaled and ratified according to our internal ratification procedures.
Please note that all data is displayed as Greenwich Mean Time (GMT)
Current Value: The 15 minute average
Highest Reading: Highest 15 minute within the last 24 hour period
The data supplied are non-validated and for information only.