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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
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You'll be notified when this gauge is rising more than 0.10 mASD/hr — a sign of rapidly increasing water levels.
Beta. You'll be notified when a flood wave detected at an upstream gauge is forecast to reach this station, with an estimated arrival time. Accuracy improves as we verify more waves.
You'll be notified when a new storm-overflow (sewage) discharge starts within ~3 km of this gauge, based on the water companies' near-real-time feeds.
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EA/SEPA data and are best-efforts. Terms
Last Level
0.384 mASD
⚠ 1h ago · may be out of date
24h Max
0.394 mASD
24h Min
0.371 mASD
Typical Range
-0.35 - 0.80
mASD
Highest Recorded
2.05 mASD
19 Jun 2026
Since Oct 2014
Current level is 19% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. Shown with its calibrated 10–90% confidence band. Under evaluation —
not yet promoted, so treat as a second opinion.
Long Term
🌍 floodradar.co.uk
—
Consecutive rainy days0 → 10+
Days Above Normal
This year vs 5-year monthly range
Recent Readings
Steady over 9h
23 Aug 23:00▲ +0.9 cm0.384 mASD
23 Aug 19:00▲ +0.4 cm0.375 mASD
23 Aug 18:45▼ -0.3 cm0.371 mASD
23 Aug 18:30▼ -0.2 cm0.374 mASD
23 Aug 18:15▼ -0.5 cm0.376 mASD
23 Aug 18:00▼ -0.7 cm0.381 mASD
23 Aug 17:45▲ +0.4 cm0.388 mASD
23 Aug 17:30▼ -0.1 cm0.384 mASD
23 Aug 17:15▼ -0.1 cm0.385 mASD
23 Aug 17:00▼ -0.1 cm0.386 mASD
23 Aug 16:45▲ +0.1 cm0.387 mASD
23 Aug 16:30▲ +0.2 cm0.386 mASD
23 Aug 16:15▬ steady0.384 mASD
23 Aug 16:00▲ +0.3 cm0.384 mASD
23 Aug 15:45▲ +0.3 cm0.381 mASD
23 Aug 15:30▼ -0.8 cm0.378 mASD
23 Aug 15:15▲ +0.4 cm0.386 mASD
23 Aug 15:00▲ +0.1 cm0.382 mASD
23 Aug 14:45▼ -0.2 cm0.381 mASD
23 Aug 14:300.383 mASD
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2013 for the 6 flood
areas linked to this gauge (nearest 0.0 km away).
Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record.
See also the Crondall flood history.
Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
🚽 Storm overflows on this river
Frequently asked questions
Is the River Hart at Crondall Pond flooding today?
The current level is 0.38m, which is within the typical range of -0.35 to 0.80m. Flooding is unlikely at this level.
Is the river level rising or falling at Crondall Pond?
Based on the most recent readings, the level is currently steady. The chart above shows the last 7 days of measurements, updated roughly every 15 minutes.
What is a normal level for the River Hart at Crondall Pond?
The typical range at this station is -0.35m to 0.80m, based on Environment Agency historical data. Levels above 0.80m are higher than usually seen and may indicate a flood risk.
How often is this river level data updated?
Readings are taken by the Environment Agency gauge roughly every 15 minutes and FloodRadar refreshes its data continuously, so the level shown is normally less than an hour old.
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📮 Flood risk by postcode near this gauge
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
