Vale of White Horse catchment
• Frilsham • West Berkshire • ID: 2140TH • Level
(23m ago) • 4 readings/hr • 134 views
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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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Current Level
0.129 mASD
▬ Steady
24h Max
0.132 mASD
24h Min
0.128 mASD
Typical Range
0.02 - 0.48
mASD
Highest Recorded
0.65 mASD
20 Jul 2007
Since Dec 1991
Current level is 20% 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.
Downstream level
7 days
The level on the DOWNSTREAM side of this lock/weir structure — a separate EA
measure from the main (upstream) reading shown on the Current tab. Threshold bands
are computed from this gauge's own downstream history.
Long Term
🌍 floodradar.co.uk
—
Consecutive rainy days0 → 10+
Days Above Normal
This year vs 5-year monthly range
Recent Readings
Steady over 6h
24 Aug 00:30▬ steady0.129 mASD
24 Aug 00:15▬ steady0.129 mASD
24 Aug 00:00▬ steady0.129 mASD
23 Aug 23:45▬ steady0.129 mASD
23 Aug 23:30▬ steady0.129 mASD
23 Aug 23:15▬ steady0.129 mASD
23 Aug 23:00▬ steady0.129 mASD
23 Aug 22:45▲ +0.1 cm0.129 mASD
23 Aug 21:30▬ steady0.128 mASD
23 Aug 21:15▬ steady0.128 mASD
23 Aug 21:00▬ steady0.128 mASD
23 Aug 20:45▬ steady0.128 mASD
23 Aug 20:30▬ steady0.128 mASD
23 Aug 20:15▬ steady0.128 mASD
23 Aug 20:00▬ steady0.128 mASD
23 Aug 19:45▬ steady0.128 mASD
23 Aug 19:00▬ steady0.128 mASD
23 Aug 18:45▬ steady0.128 mASD
23 Aug 18:30▬ steady0.128 mASD
23 Aug 18:150.128 mASD
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2011 for the 11 flood
areas linked to this gauge (nearest 2.8 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 Frilsham 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.
Catchment Character
🌊 Groundwater-fedSlow and steady — fed largely by groundwater, so levels change gradually, not in sudden spikes.
Your catchment is all the land that drains rainfall into the river above this gauge. Its character — how
steep, wet, wooded, urban or chalky that land is — decides how fast rain here turns into a rising river. A steep, bare or clay
catchment is “flashy” (rises and falls quickly, floods easily); a flat, chalk or well-wooded one is
slow and steady. The tiles below put numbers to that; the flow-duration curve reads left-to-right
from the river’s typical high flows (Q5) down to its low flows (Q95) — a steep curve means a flashy river.
The physical character of the land that drains to this gauge, and how it shapes its flood response — from the National River Flow Archive (UKCEH).
Baseflow Index
0.87
groundwater-fed — slow & steady
Avg Annual Rainfall
749 mm/yr
1991–2020 · +6% since 1941–70
Urban Extent
0.5%
largely rural
Highest Recorded Flow
2.33 m³/s
12 Mar 2024
Flow-Duration Curve
Daily flow (m³/s) exceeded each % of the time — a steep curve is flashy, a flat one is steady. Q5 high · Q50 median · Q95 low.
Land Cover (2023)
Woodland 7%Grassland 17%Arable 74%Urban 2%
Grassland 25% → 17% since 1990
Flow affected by: groundwater abstraction.
About this gauge
Gauging station located in the ephemeral stretch of the River Pang.
More detail
The catchment
A largely permeable (Chalk with modest Drift cover) rural catchment; mostly arable and pasture with significant woodland on the Tertiary outcrops (in the south).
The station
Flat V weir.
How it measures flow
Floods exceed bankfull and weed growth causes occasional drowning (flows adjusted but high submergence ratios limit accuracy). Station was used to monitor progress under alleviation of low flows programme (reduction of headwater abstractions).
Flow regime
Baseflow dominated regime; effluent can form a significant component of low flows.
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Flat-V weir
Operating since
1992
Station datum
74.0 mAOD
Flow record
1991–2024 · 33 yrs · 97% complete
Hydrometric area
39
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
🚽 Storm overflows on this river
Frequently asked questions
Is the River Pang at Frilsham flooding today?
The current level is 0.13m, which is within the typical range of 0.02 to 0.48m. Flooding is unlikely at this level.
Is the river level rising or falling at Frilsham?
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 Pang at Frilsham?
The typical range at this station is 0.02m to 0.48m, based on Environment Agency historical data. Levels above 0.48m 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:
