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Water Level Rising Slightly
Up 0.04 m since 20:30, rising slightly
0.28

Bourn Brook

Bourn Brook
Cam and Ely Ouse (Including South Level) catchment • Bourn • Cambridgeshire • ID: E24805 • Level
(23m ago) • 4 readings/hr • 261 views

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Current Level
0.275 mASD
▲ Rising slightly
24h Max
0.297 mASD
24h Min
0.128 mASD
Typical Range
0.22 - 0.50
mASD
Highest Recorded
3.08 mASD
EA official record
1.31 in our data (since Nov 2012)
Current level is 9% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Rising · +4 cm over 6h
10 Oct 03:00 ▬ steady 0.275 mASD
10 Oct 02:45 ▲ +0.1 cm 0.275 mASD
10 Oct 02:30 ▼ -0.2 cm 0.274 mASD
10 Oct 02:15 ▼ -0.1 cm 0.276 mASD
10 Oct 01:30 ▬ steady 0.277 mASD
10 Oct 01:15 ▬ steady 0.277 mASD
10 Oct 01:00 ▼ -0.1 cm 0.277 mASD
10 Oct 00:45 ▼ -0.1 cm 0.278 mASD
10 Oct 00:30 ▼ -0.1 cm 0.279 mASD
10 Oct 00:00 ▬ steady 0.280 mASD
09 Oct 23:45 ▬ steady 0.280 mASD
09 Oct 23:30 ▼ -0.1 cm 0.280 mASD
09 Oct 22:30 ▬ steady 0.281 mASD
09 Oct 22:15 ▲ +0.6 cm 0.281 mASD
09 Oct 22:00 ▲ +4 cm 0.275 mASD
09 Oct 21:45 ▬ steady 0.235 mASD
09 Oct 21:30 ▼ -0.1 cm 0.235 mASD
09 Oct 21:15 ▬ steady 0.236 mASD
09 Oct 21:00 ▼ -0.1 cm 0.236 mASD
09 Oct 20:45 0.237 mASD

Station Details

  • Monitoring Station: Bourn Brook
  • Watercourse: Bourn Brook
  • Nearest Town: Bourn
  • County: Cambridgeshire
  • Nearest reservoir: Grafham (21.1 km) · 58.3% full (as of 5 Oct 2026)
  • Coordinates: 52°11'34"N 0°3'52"W (52.192643, -0.064443)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 29 Jun 1999
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: E24805
  • RLOI id: 6262 (the EA's check-for-flooding station id)
  • EA Gauge ID: E24805-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: Cam and Ely Ouse (Including South Level)
  • Datum: 34.300m AOD
  • Typical Range: 0.222 – 0.496 mASD
  • EA Cross-check: 0.28 mASD (EA at 10 Oct 02:45)

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. Those nearby are listed below.

Nearby, connection not known

Within 6 km in a straight line, but the river map cannot say whether their water passes this gauge.

💧
Anglian Water · into Unnamed Culverted Watercourse · 5.0 km away in a straight line · its watercourse is not on the river map
12 spills · 166 hours in 2025
Not discharging now · last

1 other overflow within 6 km is downstream of this gauge or on another branch of the river network, so it is 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 0.50 m on about 28 days. This year so far: 10 days.

2026 10 days so far
2025 14 days, 2 of them high · 2 high
2024 41 days, 12 of them high · 12 high
2023 48 days, 6 of them high · 6 high
2022 13 days, 2 of them high · 2 high
2021 33 days, 5 of them high · 5 high
2020 49 days, 5 of them high · 5 high
2019 19 days, 4 of them high · 4 high
2018 26 days, 4 of them high · 4 high
2017 11 days, 3 of them high · 3 high

Counted from each day's highest reading. Days with missing or implausible readings are left out. The darker part is days above 1.20 m, the level this gauge tops only a few days a year.

Flood history near this gauge

Official Environment Agency warnings issued since 2013 for the 3 flood areas linked to this gauge (nearest 3.5 km away).

1flood warning 38flood alerts

Most recent flood warning: 24 Dec 2020 — Bourn Brook at Bourn, Toft and Comberton

Year by year
YearWarningsAlerts
2025 0 2
2024 0 8
2023 0 6
2021 0 3
2020 1 4
2019 0 3
2018 0 3
2017 0 1
2016 0 1
2014 0 6
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 Bourn flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 3 areas linked to this gauge, nearest first.

Frequently asked questions

Is the Bourn Brook at Bourn Brook flooding today?

The current level is 0.28m, which is within the typical range of 0.22 to 0.50m. Flooding is unlikely at this level.

Is the river level rising or falling at Bourn Brook?

Based on the most recent readings, the level is currently rising slightly. 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 Bourn Brook at Bourn Brook?

The typical range at this station is 0.22m 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:

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 →