Cannon Brook level at Howletts Lane, Ruislip

Latest at 10:00am on 21 December

• Height: 0.20m
• Trend: Rising
• State: Normal

Normal range 0.02m to 0.82m

Height in metres over the last 5 days

We take measurements more often as the risk of flooding increases.

Download data CSV (12KB)

How levels here could affect nearby areas

• 1.10m:
  Water reaches the highest level recorded at this measuring station (1 July 2022)
• 0.82m:
  Top of normal range. Low-lying land flooding possible above this level
• 0.20m:
  Latest level

Flooding might not happen again at the same historical levels. This may be because flood management schemes are now in place.

How we measure river, sea and groundwater levels

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