level at Harpenden
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0.70m to 1.30m
How levels here could affect nearby areas
Water reaches the highest level recorded at this measuring station (recorded on 28 May 2007)
Historical event: Flooding to properties at Wheathampstead
This is the top of the normal range
No two flood events are the same. Flooding might not happen again at the same historical levels if, for example, flood defences are now in place.