Parrett, Brue and West Somerset Streams catchment
• Ilton • Somerset • ID: 52114 • Level
(27m ago) • 4 readings/hr • 126 views
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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
Height for "Above a height"
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You'll be notified when this gauge is rising more than 0.10 m/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.
Get notified when recent rainfall near this gauge crosses its learnt rise trigger — an early "watch"
signal, typically hours before a rise. Experimental; not an official flood warning.
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Current Level
0.088 mASD
▬ Steady
24h Max
0.092 mASD
24h Min
0.085 mASD
Typical Range
0.08 - 1.30
mASD
Highest Recorded
2.20 mASD
EA official record
2.20 in our data (since Oct 1962)
Current level is 4% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
EA forecast (official)
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. The shaded band is its 10–90% range, widened so that about 80% of recent outcomes fall inside it.
Under evaluation — not yet promoted, so treat as a second opinion.
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.
Flow Data: Daily mean flow (m³/s) to 9 Oct (2 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional)via EA Hydrology
Storm overflows whose water reaches this gauge on the mapped river network, nearest first by distance along the river. The status is each water company's monitor: it says whether an overflow is discharging, not how much or what it contains.
9 storm overflows are traced upstream of this gauge, the nearest 2.2 km away along the river. 0 report discharging now, 9 report not discharging.
Wessex Water · into Tributary Of Fivehead River · 5.5 km away in a straight line · no mapped watercourse close enough to be sure
6 spills · 24 hours in 2025
Not discharging now · last
4 other overflows within 6 km are downstream of this gauge or on another branch of the river network, so they are not listed.
These are the water companies' monitor statuses; a spill does not by itself explain a change in the gauge level. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels. Explore the sewage map →
In a typical year this gauge reaches its typical high of 1.30 m
on about 9 days.
This year so far: 7 days.
20267 days, 4 of them high · 4 highso far
202513 days, 9 of them high · 9 high
202413 days, 7 of them high · 7 high
202313 days, 8 of them high · 8 high
20226 days, 2 of them high · 2 high
20219 days, 6 of them high · 6 high
202010 days, 7 of them high · 7 high
20194 days, 3 of them high · 3 high
20188 days, 4 of them high · 4 high
20173 days, 2 of them high · 2 high
Counted from each day's highest reading. Days with missing or implausible readings are left out.
The darker part is days above 1.57 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2006 for the 4 flood
areas linked to this gauge (nearest 0.4 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 Ilton flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 4 areas linked to this gauge, nearest first.
🌊 Fairly flashyResponds fairly quickly to rain, with moderate baseflow between events.
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
0.50
mixed response
Avg Annual Rainfall
970 mm/yr
1991–2020 · +3% since 1941–70
Urban Extent
2.6%
largely rural
Median Annual Flood
35.81 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
30.70 m³/s
27 Dec 1979 · daily mean, not the instantaneous peak
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.
Crump profile weir for low flows with velocity area section for higher flows further downstream. Site subject to vandalism.
More detail
The catchment
Very responsive, impermeable catchment, predominantly comprising of Lower Lias clays. Land use is rural. No major catchment changes.
The station
Crump profile weir for low flows, crest 6.71m broad, located approximately 300m upstream of Ashford Mill House. Velocity area station for higher flows downstream. Site subject to vandalism.
How it measures flow
Modular limit of 0.6m. Downstream weed growth affects the stability of the stage-discharge relationship. Bypassing of station at high flows; extensive floodplain storage occurs next to the station before bankfull reached. Rating reviewed by EA in 2016. Peak flow rating curve is a combination of theoretical for weir and best-fit curve for medium and high flows. Scatter in gaugings at high flows although general shape of rating confirmed. Modelled top segment for out of bank flows.
Flow regime
Flows influenced by minor groundwater abstraction, but augmented by effluent returns; evidence of mill/factory discharges on charts.
The flow record
Peak flows between 1989 and 1991 are marked as rejected pending a rating review. Full period of record peak flow data reviewed and released in September 2020 (WINFAP Files v9).
Timing, not cause. Gauges can move together simply because the same rain fell on both.
Frequently asked questions
Is the River Isle at Ashford Mill flooding today?
The current level is 0.09m, which is within the typical range of 0.08 to 1.30m. Flooding is unlikely at this level.
Is the river level rising or falling at Ashford Mill?
Based on the most recent readings, the level is currently steady. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.
What is a normal level for the River Isle at Ashford Mill?
The typical range at this station is 0.08m to 1.30m, based on Environment Agency historical data. Levels above 1.30m are higher than usually seen and may indicate a flood risk.
How often is this river level data updated?
Readings are supplied by the Environment Agency gauge. FloodRadar checks for updates roughly every 15 minutes; the timestamp above shows how recent the latest available reading is.
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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:
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11 Jul 2019 View downstream to gauging station
11 Jul 2019 View upstream from gauging station
11 Jul 2019 View across weir, bed-mounted ADCP in centre of the channel upstream of weir
11 Jul 2019 View downstream to gauging station
2014 Structure under high flows from on site webcam
Looking across weir (old image prior to refurbishment work)
Looking across weir at low flows