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Water Level Rising
Up 0.12 m since 02:45, still rising (0.05 m/h)
1.20

Hamerton

Alconbury Brook
Upper and Bedford Ouse catchment • Hamerton • Cambridgeshire • ID: E21788 • Level
(35m ago) • 4 readings/hr • 144 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
1.200 mASD?
▲ Rising (+5cm/hr)
24h Max
1.200 mASD
24h Min
1.084 mASD
Typical Range
1.02 - 2.20
mASD
Highest Recorded
3.60 mASD
EA official record
3.91 in our data (since Nov 2012)
Current level is 33% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Rising · +12 cm over 5h
25 Oct 08:00 ▲ +1 cm 1.200 mASD
25 Oct 07:45 ▲ +1 cm 1.188 mASD
25 Oct 07:30 ▲ +1 cm 1.176 mASD
25 Oct 07:15 ▲ +1 cm 1.163 mASD
25 Oct 07:00 ▲ +1 cm 1.152 mASD
25 Oct 06:45 ▲ +0.9 cm 1.140 mASD
25 Oct 06:30 ▲ +0.9 cm 1.131 mASD
25 Oct 06:15 ▲ +0.7 cm 1.122 mASD
25 Oct 06:00 ▲ +0.5 cm 1.115 mASD
25 Oct 05:45 ▲ +0.4 cm 1.110 mASD
25 Oct 05:30 ▲ +0.4 cm 1.106 mASD
25 Oct 05:15 ▲ +0.4 cm 1.102 mASD
25 Oct 05:00 ▲ +0.3 cm 1.098 mASD
25 Oct 04:45 ▲ +0.2 cm 1.095 mASD
25 Oct 04:30 ▲ +0.2 cm 1.093 mASD
25 Oct 04:15 ▲ +0.3 cm 1.091 mASD
25 Oct 04:00 ▲ +0.1 cm 1.088 mASD
25 Oct 03:45 ▲ +0.2 cm 1.087 mASD
25 Oct 03:30 ▬ steady 1.085 mASD
25 Oct 03:15 1.084 mASD

Station Details

  • Monitoring Station: Hamerton
  • Watercourse: Alconbury Brook
  • Nearest Town: Hamerton
  • County: Cambridgeshire
  • Nearest reservoir: Grafham (14.4 km) · 55.1% full (as of 19 Oct 2026)
  • Coordinates: 52°25'41"N 0°21'15"W (52.428112, -0.354200)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Mar 1993
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: E21788
  • RLOI id: 6075 (the EA's check-for-flooding station id)
  • EA Gauge ID: E21788-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD?
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Upper and Bedford Ouse
  • Datum: 24.800m AOD
  • Typical Range: 1.015 – 2.200 mASD
  • EA Cross-check: 1.19 mASD (EA at 25 Oct 07:45)

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

Rainfall & Weather

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How often this river runs high

In a typical year this gauge reaches its typical high of 2.20 m on about 7 days. This year so far: 9 days.

2026 9 days, 4 of them high · 4 high so far
2025 1 day, 1 of them high · 1 high
2024 13 days, 10 of them high · 10 high
2023 12 days, 6 of them high · 6 high
2022 4 days, 2 of them high · 2 high
2021 7 days, 5 of them high · 5 high
2020 7 days, 6 of them high · 6 high
2019 7 days, 5 of them high · 5 high
2018 7 days, 3 of them high · 3 high
2017 3 days, 2 of them high · 2 high

Counted from each day's highest reading. Days with missing or implausible readings are left out. The darker part is days above 2.39 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 4 flood areas linked to this gauge (nearest 7.4 km away).

8flood warnings 43flood alerts

Most recent flood warning: 27 Nov 2024 — Areas near the River Nene from Thorpe Waterville to Eaglethorpe

Year by year
YearWarningsAlerts
2026 0 9
2025 0 4
2024 2 12
2023 0 12
2022 0 6
2020 2 0
2012 4 0

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 Hamerton flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 4 areas linked to this gauge, nearest first.

Frequently asked questions

Is the Alconbury Brook at Hamerton flooding today?

The current level is 1.20m, which is within the typical range of 1.02 to 2.20m. Flooding is unlikely at this level.

Is the river level rising or falling at Hamerton?

Based on the most recent readings, the level is currently rising. 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 Alconbury Brook at Hamerton?

The typical range at this station is 1.02m to 2.20m, based on Environment Agency historical data. Levels above 2.20m 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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