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CHILBOLTON USGS

Unknown
• Hampshire • ID: E13825 • Flow
(21m ago) • 4 readings/hr • 113 views
Current Flow
2.738 m3/s
▬ Steady
24h Max
2.765 m3/s
24h Min
2.676 m3/s
Typical Range
-
Highest Recorded
14.85 m3/s
27 Feb 2025
Since Feb 2025
🚽 Sewage overflows nearby

Recent Flow Readings

🌍 floodradar.co.uk
1 day

Recent Readings

Rising · +3 cm over 5h
10 Oct 13:15 ▼ -1 cm 2.738 m3/s
10 Oct 13:00 ▲ +2 cm 2.750 m3/s
10 Oct 12:45 ▼ -1 cm 2.734 m3/s
10 Oct 12:30 ▲ +0.1 cm 2.748 m3/s
10 Oct 12:15 ▲ +3 cm 2.747 m3/s
10 Oct 12:00 ▲ +0.2 cm 2.717 m3/s
10 Oct 11:45 ▼ -0.1 cm 2.715 m3/s
10 Oct 11:30 ▼ -2 cm 2.716 m3/s
10 Oct 11:15 ▲ +0.3 cm 2.732 m3/s
10 Oct 11:00 ▲ +0.3 cm 2.729 m3/s
10 Oct 10:45 ▬ steady 2.726 m3/s
10 Oct 10:30 ▲ +2 cm 2.727 m3/s
10 Oct 10:15 ▼ -1 cm 2.710 m3/s
10 Oct 10:00 ▲ +2 cm 2.723 m3/s
10 Oct 09:45 ▼ -1 cm 2.702 m3/s
10 Oct 09:30 ▲ +0.2 cm 2.716 m3/s
10 Oct 09:15 ▲ +0.2 cm 2.714 m3/s
10 Oct 09:00 ▲ +2 cm 2.712 m3/s
10 Oct 08:45 ▼ -2 cm 2.694 m3/s
10 Oct 08:30 2.709 m3/s

Station Details

  • Monitoring Station: CHILBOLTON USGS
  • Watercourse: —
  • County: Hampshire
  • Coordinates: 51°9'8"N 1°27'1"W (51.152238, -1.450298)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Status: Active
  • Station Type: Flow gauging station (inferred)
Technical details: references, datum, range, flow archive
  • Station Reference: E13825
  • EA Gauge ID: E13825-flow--Mean-15_min-m3_s
  • Parameter: Flow
  • Unit: m3/s
  • Typical rise rate: 18 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No

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

At this site

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 140 m away along the river. 0 report discharging now, 1 reports not discharging.

💧
Southern Water · into The River Test · 140 m upstream along the river
2 spills · 14 hours in 2025
Not discharging now · last

4 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

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Flood history near this gauge

Official Environment Agency warnings issued since 2020 for the 5 flood areas linked to this gauge (nearest 4.6 km away).

1flood warning 4flood alerts

Most recent flood warning: 31 Aug 2023 — Micheldever to Bransbury on the River Dever

Year by year
YearWarningsAlerts
2023 1 1
2020 0 3

Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record.

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.

Frequently asked questions

Is CHILBOLTON USGS flooding today?

The latest recorded level is 2.74m. Compare it with the recent history on the chart above to judge whether levels are unusually high.

Is the river level rising or falling at CHILBOLTON USGS?

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.

Why is the level slowly falling?

When little or no rain has fallen for a while, a river level gradually drops as the water stored in the ground and soil drains away with nothing to replace it. This is called baseflow recession and is normal in dry spells. A gentle decline like this is expected and is not a sign of a problem — downstream gauges often recede a little faster than headwaters further upstream, and levels recover once rain returns.

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.

Embed this gauge on your website

Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.

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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 →