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-0.03

Millbrook

Tanners Brook
Test and Itchen catchment • Millbrook • Hampshire • ID: E13281 • Level
(36m ago) • 4 readings/hr • 203 views

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Current Level
-0.031 mASD
▬ Steady
24h Max
-0.006 mASD
24h Min
-0.043 mASD
Typical Range
0.03 - 0.50
mASD
Highest Recorded
0.70 mASD
EA official record
A 0.90 reading (17 Feb 2014) sits in our unverified raw history and is not treated as the record
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Rising · +0.7 cm over 5h
08 Oct 20:45 ▬ steady -0.031 mASD
08 Oct 20:30 ▼ -0.5 cm -0.031 mASD
08 Oct 20:15 ▼ -0.3 cm -0.026 mASD
08 Oct 20:00 ▼ -0.2 cm -0.023 mASD
08 Oct 19:45 ▼ -0.4 cm -0.021 mASD
08 Oct 19:30 ▼ -0.2 cm -0.017 mASD
08 Oct 19:15 ▲ +0.8 cm -0.015 mASD
08 Oct 19:00 ▲ +0.9 cm -0.023 mASD
08 Oct 18:45 ▲ +0.4 cm -0.032 mASD
08 Oct 18:30 ▬ steady -0.036 mASD
08 Oct 18:15 ▬ steady -0.036 mASD
08 Oct 18:00 ▬ steady -0.035 mASD
08 Oct 17:45 ▲ +0.1 cm -0.036 mASD
08 Oct 17:30 ▼ -0.1 cm -0.037 mASD
08 Oct 17:15 ▲ +0.2 cm -0.036 mASD
08 Oct 17:00 ▬ steady -0.038 mASD
08 Oct 16:45 ▼ -0.3 cm -0.038 mASD
08 Oct 16:30 ▲ +0.4 cm -0.035 mASD
08 Oct 16:15 ▼ -0.1 cm -0.039 mASD
08 Oct 16:00 -0.038 mASD

Station Details

  • Monitoring Station: Millbrook
  • Watercourse: Tanners Brook
  • Nearest Town: Millbrook
  • County: Hampshire
  • Coordinates: 50°55'11"N 1°26'53"W (50.919652, -1.447963)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 1977
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: E13281
  • RLOI id: 1149 (the EA's check-for-flooding station id)
  • EA Gauge ID: E13281-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 2 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Test and Itchen
  • Typical Range: 0.026 – 0.500 mASD
  • Drainage Area: 16 km² upstream of this gauge
  • EA Cross-check: -0.03 mASD (EA at 8 Oct 20:45)
  • 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

Nearby

Rainfall & Weather

Loading rainfall and weather data...

How often this river runs high

In a typical year this gauge reaches its typical high of 0.50 m on about 1 day. This year so far: 0 days.

2026 0 days so far
2025 0 days
2024 3 days
2023 0 days
2022 1 day
2021 3 days
2020 4 days
2019 1 day
2018 0 days
2017 1 day

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 2013 for the 6 flood areas linked to this gauge (nearest 1.2 km away).

15flood warnings 24flood alerts

Most recent flood warning: 19 Feb 2026 — Rushington and Eling on the Bartley Water

Year by year
YearWarningsAlerts
2026 2 2
2025 2 3
2024 3 6
2023 3 2
2020 2 3
2019 0 1
2017 0 1
2016 1 4
2014 2 1
2013 0 1

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 Millbrook 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

🌊 Urban & flashy Heavily built-up — rain runs off hard surfaces fast, so levels can spike within hours of heavy rain.

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
0.37
mixed response
Avg Annual Rainfall
874 mm/yr
1991–2020 · +9% since 1941–70
Urban Extent
25%
heavily urbanised
Highest Daily Mean Flow
3.06 m³/s
1 Jan 2003 · daily mean, not the instantaneous peak
Flow-Duration Curve
mean 0.2070.6140.1500.0125% (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 31%Grassland 24%Arable 1%Urban 44%

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

Velocity area station with a responsive regime and urban catchment.

More detail

The catchment

A largely urban (Southampton) catchment developed on impervious Tertiary formations.

The station

Velocity area station in a trapezoidal concrete section.

How it measures flow

Initially a level only station but stage-discharge relation now established for all but the highest flows. Structure contains even the highest flows, so good confidence in high flows at this site.

Flow regime

Responsive regime.

The flow record

Pre-1992 (and some later) peaks truncated at ~1 cumec.

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
Velocity–area
Operating since
1977–2015
Station datum
3.9 mAOD
Flow record
1977–2013 · 36 yrs · 98% complete
Hydrometric area
42
Measured by
Environment Agency

Frequently asked questions

Is the Tanners Brook at Millbrook flooding today?

The current level is -0.03m, which is below the typical range. Flooding is very unlikely at this level.

Is the river level rising or falling at Millbrook?

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 Tanners Brook at Millbrook?

The typical range at this station is 0.03m to 0.50m, based on Environment Agency historical data. Levels above 0.50m 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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🏠 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 →