Test and Itchen catchment
• Colden Common • Hampshire • ID: E12442 • Level
(35m ago) • 3 readings/hr • 139 views
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Height for "Above a height"
Drag the line on the chart, or type a value:mASD
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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.
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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Not an emergency service — if in danger call 999. Alerts rely on
EA/SEPA data and are best-efforts. Terms
Current Level
0.296 mASD
▬ Steady
24h Max
0.308 mASD
24h Min
0.295 mASD
Typical Range
0.26 - 0.75
mASD
Highest Recorded
0.99 mASD
12 Feb 2014
Since Aug 1981
Current level is 30% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
Flood predictions aren't generated for
lock / structure gauges —
their levels are driven by gate operation,
not by catchment rainfall, so the forecast models would have no skill here.
River Flow
90 days
Daily mean discharge (m³/s) with the daily min–max band, from the EA Hydrology API. Flow is the volume of water passing the gauge — often a more direct flood signal than level.
Long Term
🌍 floodradar.co.uk
—
Consecutive rainy days0 → 10+
Days Above Normal
This year vs 5-year monthly range
Recent Readings
Steady over 7h
23 Aug 23:15▼ -0.1 cm0.296 mASD
23 Aug 23:00▬ steady0.297 mASD
23 Aug 22:45▲ +0.1 cm0.297 mASD
23 Aug 21:15▬ steady0.296 mASD
23 Aug 21:00▬ steady0.296 mASD
23 Aug 20:45▬ steady0.296 mASD
23 Aug 20:30▬ steady0.296 mASD
23 Aug 20:15▬ steady0.296 mASD
23 Aug 20:00▬ steady0.296 mASD
23 Aug 19:45▬ steady0.296 mASD
23 Aug 19:30▬ steady0.296 mASD
23 Aug 19:15▬ steady0.296 mASD
23 Aug 19:00▲ +0.1 cm0.296 mASD
23 Aug 18:30▬ steady0.295 mASD
23 Aug 18:00▼ -0.1 cm0.295 mASD
23 Aug 17:30▬ steady0.296 mASD
23 Aug 17:00▬ steady0.296 mASD
23 Aug 16:30▬ steady0.296 mASD
23 Aug 16:15▬ steady0.296 mASD
23 Aug 16:000.296 mASD
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2012 for the 11 flood
areas linked to this gauge (nearest 0.9 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 Colden Common 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
🚽 Storm overflows on this river
Frequently asked questions
Is the River Itchen at Highbridge weir flooding today?
The current level is 0.30m, which is within the typical range of 0.26 to 0.75m. Flooding is unlikely at this level.
Is the river level rising or falling at Highbridge weir?
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 Itchen at Highbridge weir?
The typical range at this station is 0.26m to 0.75m, based on Environment Agency historical data. Levels above 0.75m 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:
