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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 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.
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Current Level
0.437 mASD
▬ Steady
24h Max
0.441 mASD
24h Min
0.437 mASD
Typical Range
0.49 - 1.08
mASD
Highest Recorded
1.42 mASD
EA official record
1.41 in our data (since Dec 1996)
Current level is 31% 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 6 Oct (2 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional)via EA Hydrology
None of the storm overflows FloodRadar holds is traced upstream of this gauge on the mapped river network. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow.
5 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 1.08 m
on about 13 days.
This year so far: 18 days.
202618 days so far
20250 days
202440 days, 1 of them high · 1 high
202328 days, 8 of them high · 8 high
20220 days
20210 days
202028 days
201913 days
20184 days
20170 days
Counted from each day's highest reading. Days with missing or implausible readings are left out.
The darker part is days above 1.27 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2012 for the 12 flood
areas linked to this gauge (nearest 1.0 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 Nunton flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 12 areas linked to this gauge, nearest first.
🌊 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
0.89
groundwater-fed — slow & steady
Avg Annual Rainfall
1,017 mm/yr
1991–2020 · +7% since 1941–70
Urban Extent
2.6%
largely rural
Median Annual Flood
4.64 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
7.23 m³/s
4 Jan 2014 · 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.
Land Cover (2023)
Woodland 11%Grassland 39%Arable 44%Urban 6%
Grassland 43% → 39% since 1990
Flow affected by: public water supply, groundwater abstraction, effluent returns.
Photos
Gauging-station photographs from the National River Flow Archive (UKCEH).
Geology is predominantly Chalk with Upper Greensand and Gault in higher parts of catchment. The upper Greensand outcrops in the higher parts of the catchment around Kilmington and further downstream between Norton Bavant and Warminster there is a large outcrop of Upper Greensand associated with an anticlinal structure trending east/west. To the south of this outcrop there is an appreciable Chalk outcrop consisting mainly of Middle and Lower Chalk with limited outcrops of Upper Chalk. Land use is rural. No major catchment changes.
The station
Crump profile weir, crest 6.09m broad. Full range station, theoretically rated. Station closed on 18/07/2024 due to modification of weir structure to aid fish passage, and is being replaced by an ultrasonic gauge in a similar location.
How it measures flow
Out-of-bank flow may occur just upstream before bankfull at gauging station. Bypassing occurs during very extreme events but is not a major issue. One theoretical rating applied. Upper limit of rating is 0.41m, it is extrapolated beyond that limit.
Flow regime
Some augmentation of flow. Substantial upstream groundwater abstractions and hatcheries affect flow.
The flow record
Full period of record peak flow data reviewed and released in September 2019 (WINFAP Files v8) and in August 2024 (WINFAP Files v13).
Timing, not cause. Gauges can move together simply because the same rain fell on both.
Frequently asked questions
Is the River Ebble at Nunton Bridge flooding today?
The current level is 0.44m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Nunton Bridge?
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 Ebble at Nunton Bridge?
The typical range at this station is 0.49m to 1.08m, based on Environment Agency historical data. Levels above 1.08m 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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Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.
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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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