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0.04

Marlborough

Kennet
Vale of White Horse catchment • Marlborough • Wiltshire • ID: 2210TH • Level
(1h ago) • 4 readings/hr • 180 views

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Current Level
0.042 mASD
▬ Steady
24h Max
0.047 mASD
24h Min
0.039 mASD
Typical Range
0.04 - 0.63
mASD
Highest Recorded
1.29 mASD
EA official record
A 2.39 reading (16 Mar 2025) sits in our unverified raw history and is not treated as the record
Current level is 3% of this
Current Flow
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🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Steady over 6h
08 Oct 01:30 ▬ steady 0.042 mASD
08 Oct 01:15 ▬ steady 0.042 mASD
08 Oct 01:00 ▬ steady 0.042 mASD
08 Oct 00:45 ▬ steady 0.042 mASD
08 Oct 00:30 ▬ steady 0.042 mASD
08 Oct 00:15 ▬ steady 0.042 mASD
08 Oct 00:00 ▬ steady 0.042 mASD
07 Oct 23:45 ▬ steady 0.042 mASD
07 Oct 23:30 ▬ steady 0.042 mASD
07 Oct 22:30 ▬ steady 0.042 mASD
07 Oct 22:15 ▬ steady 0.042 mASD
07 Oct 22:00 ▬ steady 0.042 mASD
07 Oct 21:45 ▬ steady 0.042 mASD
07 Oct 21:30 ▬ steady 0.042 mASD
07 Oct 21:15 ▬ steady 0.042 mASD
07 Oct 21:00 ▲ +0.1 cm 0.042 mASD
07 Oct 20:45 ▼ -0.1 cm 0.041 mASD
07 Oct 20:30 ▲ +0.1 cm 0.042 mASD
07 Oct 20:15 ▼ -0.1 cm 0.041 mASD
07 Oct 20:00 0.042 mASD

Station Details

  • Monitoring Station: Marlborough
  • Watercourse: River Kennet
  • Nearest Town: Marlborough
  • County: Wiltshire
  • Coordinates: 51°24'59"N 1°43'57"W (51.416287, -1.732479)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 1986
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 2210TH
  • RLOI id: 7113 (the EA's check-for-flooding station id)
  • EA Gauge ID: 2210TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 0 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Vale of White Horse
  • Typical Range: 0.041 – 0.630 mASD
  • Drainage Area: 142 km² upstream of this gauge
  • 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
  • EA Cross-check: 0.04 mASD (EA at 8 Oct 01:45)
  • Flow Archive: National River Flow Archive ↗

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 Stations

Gauges connected to this river, and others nearby. A distance “by river” follows the river on the map; any other is in a straight line.

Connected upstream

Connected downstream

Same river system, separate branch

Distances by river: OS Open Rivers. Contains OS data © Crown copyright and database rights 2026.

💧 Storm overflows upstream of this gauge

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.

1 storm overflow is traced upstream of this gauge, the nearest 4.9 km away along the river. 0 report discharging now, 1 reports not discharging.

💧
Thames Water · into River Kennet · 4.9 km upstream along the river
0 spills · 0 hours in 2025
Not discharging now · last

2 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 →

Contains OS data © Crown copyright and database rights 2026.

Rainfall & Weather

Loading rainfall and weather data...

How often this river runs high

In a typical year this gauge reaches its typical high of 0.63 m on about 1 day. This year so far: 0 days.

2026 0 days so far
2025 1 day
2024 7 days
2023 0 days
2022 0 days
2021 0 days
2020 1 day
2019 0 days
2018 0 days
2017 0 days

Counted from each day's highest reading. Days with missing or implausible readings are left out.

Flood history near this gauge

Official Environment Agency warnings issued since 2012 for the 6 flood areas linked to this gauge (nearest 1.0 km away).

1severe warning 6flood warnings 90flood alerts

Most recent flood warning: 5 Jan 2024 — River Kennet from Mildenhall to just above Hungerford

Year by year
YearSevereWarningsAlerts
2026 0 0 45
2025 0 0 3
2024 1 3 5
2023 0 1 6
2021 0 0 6
2020 0 1 6
2019 0 0 3
2018 0 0 4
2016 0 0 1
2014 0 1 2
2013 0 0 2
2012 0 0 7

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 Marlborough flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 6 areas linked to this gauge, nearest first.

Catchment Character

🌊 Groundwater-fed Slow 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
0.96
groundwater-fed — slow & steady
Avg Annual Rainfall
883 mm/yr
1991–2020 · +8% since 1941–70
Urban Extent
0.6%
largely rural
Median Annual Flood
3.18 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
25.92 m³/s
5 Jan 2024 · daily mean, not the instantaneous peak
Flow-Duration Curve
mean 0.9342.950.5730.0845% (high)% of days exceeded95% (low)
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 5%Grassland 31%Arable 62%Urban 2%
Grassland 38% → 31% since 1990

Flow affected by: groundwater abstraction.

Photos

Gauging-station photographs from the National River Flow Archive (UKCEH).

Photos © NRFA / UKCEH & the measuring authority — shown at web resolution. Full gallery on the NRFA ↗

About this gauge

Station based in the chalk dominated upper catchment of the River Kennet.

More detail

The catchment

A Chalk catchment with some Clay-with-Flints cover in the lower catchment. It is predominantly rural with Marlborough, a market town, close to outfall. The runoff is low and overall is a baseflow dominated catchment. The hydrological catchment is smaller than the topographical catchment.

The station

Crump weir, 6.1m broad, with crest-tapping plus a broad-crested side weir for high flows. Fish passage baffles fitted to back face of the main crump weir in 2014.

How it measures flow

Full range and only subject to occasional drowning. One peak flow rating applied across period of record. Rating curve currently underestimates flows beyond 0.442m when the rating should be based on a crump and broad crested weir.

Flow regime

Baseflow dominated regime where runoff is low. The hydrological catchment is smaller than the topographical catchment; some diminution (reduction) in flow also results from gw abstraction.

The flow record

Full period of record peak flow data reviewed and released in September 2023 (WINFAP Files v12).

Descriptions from the National River Flow Archive (UKCEH). NRFA station record ↗

Gauge Details

How this gauging station is built and how long it has measured (NRFA / UKCEH).

Gauge type
Crump weir
Operating since
1972
Station datum
126.5 mAOD
Flow record
1972–2024 · 52 yrs · 100% complete
Peak-flow record
since 1972
Hydrometric area
39
Measured by
Environment Agency

Frequently asked questions

Is the River Kennet at Marlborough flooding today?

The current level is 0.04m, which is within the typical range of 0.04 to 0.63m. Flooding is unlikely at this level.

Is the river level rising or falling at Marlborough?

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 Kennet at Marlborough?

The typical range at this station is 0.04m to 0.63m, based on Environment Agency historical data. Levels above 0.63m 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:

Check any UK postcode’s flood risk →

🏠 Buying or renting around here? Get the Property Flood-Risk Report for any English postcode — official risk band, recorded floods, warning history, river behaviour and nearby storm overflows. £19 one-off. Learn more →