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0.11

Blewbury

Mill Brook ⚙ Structure
Vale of White Horse catchment • Blewbury • Oxfordshire • ID: 2020TH • Level
(24m ago) • 4 readings/hr • 158 views

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Not an emergency service — if in danger call 999. Alerts rely on EA/SEPA/NRW data and are best-efforts. Terms

Current Level
0.106 mASD
▬ Steady
24h Max
0.111 mASD
24h Min
0.104 mASD
Typical Range
0.09 - 0.24
mASD
Highest Recorded
0.49 mASD
EA official record
A 0.55 reading (4 Feb 2014) sits in our unverified raw history and is not treated as the record
Current level is 22% 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.

Recent Readings

Steady over 6h
08 Oct 13:30 ▼ -0.1 cm 0.106 mASD
08 Oct 13:15 ▬ steady 0.107 mASD
08 Oct 13:00 ▬ steady 0.107 mASD
08 Oct 12:45 ▲ +0.1 cm 0.107 mASD
08 Oct 12:15 ▬ steady 0.106 mASD
08 Oct 12:00 ▬ steady 0.106 mASD
08 Oct 11:45 ▬ steady 0.106 mASD
08 Oct 11:30 ▬ steady 0.106 mASD
08 Oct 11:00 ▬ steady 0.106 mASD
08 Oct 10:30 ▬ steady 0.106 mASD
08 Oct 10:15 ▬ steady 0.106 mASD
08 Oct 10:00 ▼ -0.1 cm 0.106 mASD
08 Oct 09:30 ▬ steady 0.107 mASD
08 Oct 09:15 ▬ steady 0.107 mASD
08 Oct 09:00 ▬ steady 0.107 mASD
08 Oct 08:45 ▲ +0.1 cm 0.107 mASD
08 Oct 08:30 ▬ steady 0.106 mASD
08 Oct 08:15 ▬ steady 0.106 mASD
08 Oct 08:00 ▬ steady 0.106 mASD
08 Oct 07:45 0.106 mASD

Station Details

  • Monitoring Station: Blewbury
  • Watercourse: Mill Brook
  • Nearest Town: Blewbury
  • County: Oxfordshire
  • Nearest reservoir: Farmoor (21.5 km) · 76.0% full (as of 31 Aug 2026)
  • Coordinates: 51°34'23"N 1°14'1"W (51.573061, -1.233747)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 1995
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 2020TH
  • RLOI id: 7103 (the EA's check-for-flooding station id)
  • EA Gauge ID: 2020TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 1 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: ⚙ Yes — lock, weir, sluice or pump
  • Catchment Area: Vale of White Horse
  • Typical Range: 0.086 – 0.240 mASD
  • Drainage Area: 2.0 km² upstream of this gauge
  • Flow Data: Daily mean flow (m³/s) to 29 Aug (1136 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional) via EA Hydrology
  • EA Cross-check: 0.11 mASD (EA at 8 Oct 13:15)
  • 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 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

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.

3 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

This gauge rarely reaches its typical high of 0.24 m: 3 days since 2017. This year so far: 0 days.

2026 0 days so far
2025 0 days
2024 3 days
2023 0 days
2022 0 days
2021 0 days
2020 0 days
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 2009 for the 5 flood areas linked to this gauge (nearest 4.2 km away).

7flood warnings 136flood alerts

Most recent flood warning: 24 Nov 2024 — Ginge Brook between Steventon and Sutton Courtenay, including Milton and Drayton Mill areas

Year by year
YearWarningsAlerts
2026 0 40
2025 0 7
2024 5 13
2023 0 12
2021 0 5
2020 1 11
2019 0 4
2018 0 4
2017 0 2
2016 0 7
2015 1 2
2014 0 4
2013 0 12
2012 0 11
2009 0 2

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 Blewbury flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 5 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
0.95
groundwater-fed — slow & steady
Avg Annual Rainfall
666 mm/yr
1991–2020 · +2% since 1941–70
Urban Extent
4.2%
partly urbanised
Highest Daily Mean Flow
0.409 m³/s
6 Feb 2014 · daily mean, not the instantaneous peak
Flow-Duration Curve
mean 0.1120.2420.0980.0335% (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)
Grassland 22%Arable 59%Urban 18%
Urban 24% → 18% since 1990

About this gauge

Gauging station located downstream of the Oxfordshire village of Blewbury at the foot of the Berkshire Downs.

More detail

The catchment

Rural catchment developed on the Chalk (but Blewbury village is immediately u/s).

The station

Flat V weir.

Flow regime

Stable regime - the Mill Brook is spring-fed. Thames Water abstraction occurs u/s. Flow constraint of 40 megalitres/day.

The flow record

Groundwater catchment substantially exceeds the topographical catchment; runoff totals are unrealistic.

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
Flat-V weir
Operating since
1995
Station datum
59.8 mAOD
Flow record
1996–2023 · 27 yrs · 100% complete
Hydrometric area
39
Measured by
Environment Agency

Frequently asked questions

Is the Mill Brook at Blewbury flooding today?

The current level is 0.11m, which is within the typical range of 0.09 to 0.24m. Flooding is unlikely at this level.

Is the river level rising or falling at Blewbury?

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 Mill Brook at Blewbury?

The typical range at this station is 0.09m to 0.24m, based on Environment Agency historical data. Levels above 0.24m 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 →