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⏱ Last reading 2h ago
0.10

Crondall Bridge

Hart
Loddon catchment • Crondall • Hampshire • ID: 2450TH • Level
(2h ago) • 1 reading/hr • 122 views

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Last Level
0.095 mASD
⚠ 2h ago · may be out of date
24h Max
0.096 mASD
24h Min
0.093 mASD
Typical Range
0.09 - 0.49
mASD
Highest Recorded
1.12 mASD
EA official record
1.12 in our data (since Oct 2021)
Current level is 8% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Steady over 9h
09 Oct 21:00 ▲ +0.1 cm 0.095 mASD
09 Oct 17:00 ▬ steady 0.094 mASD
09 Oct 16:45 ▬ steady 0.094 mASD
09 Oct 16:30 ▬ steady 0.094 mASD
09 Oct 16:15 ▼ -0.1 cm 0.094 mASD
09 Oct 16:00 ▬ steady 0.095 mASD
09 Oct 15:45 ▲ +0.1 cm 0.095 mASD
09 Oct 15:30 ▼ -0.1 cm 0.094 mASD
09 Oct 15:15 ▬ steady 0.095 mASD
09 Oct 15:00 ▬ steady 0.095 mASD
09 Oct 14:45 ▬ steady 0.095 mASD
09 Oct 14:30 ▬ steady 0.095 mASD
09 Oct 14:15 ▬ steady 0.095 mASD
09 Oct 14:00 ▬ steady 0.095 mASD
09 Oct 13:45 ▬ steady 0.095 mASD
09 Oct 13:30 ▬ steady 0.095 mASD
09 Oct 13:15 ▬ steady 0.095 mASD
09 Oct 13:00 ▬ steady 0.095 mASD
09 Oct 12:45 ▬ steady 0.095 mASD
09 Oct 12:30 0.095 mASD

Station Details

  • Monitoring Station: Crondall Bridge
  • Watercourse: River Hart
  • Nearest Town: Crondall
  • County: Hampshire
  • Coordinates: 51°14'15"N 0°51'32"W (51.237527, -0.858803)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 20 Oct 2021
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 2450TH
  • RLOI id: 9589 (the EA's check-for-flooding station id)
  • EA Gauge ID: 2450TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 0 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Loddon
  • Typical Range: 0.092 – 0.490 mASD
  • EA Cross-check: 0.10 mASD (EA at 9 Oct 21:00)

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

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.

💧
Thames Water · into River Hart · 290 m away in a straight line · too close to the gauge to say which side
58 spills · 823 hours in 2025
Not discharging now · last
💧
Thames Water · into River Wey And Groundwater · 5.7 km away in a straight line · no mapped watercourse close enough to be sure
4 spills · 24 hours in 2025
Not discharging now · last
💧
Thames Water · into Basingstoke Canal · 5.8 km away in a straight line · no mapped watercourse close enough to be sure
7 spills · 10 hours in 2025
Not discharging now · last
💧
Thames Water · into Farnham Park Tributary · 5.8 km away in a straight line · several watercourses close by, nothing to choose between them
27 spills · 269 hours in 2025
No live feed for this overflow

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 0.49 m on about 5 days. This year so far: 2 days.

2026 2 days so far
2025 4 days, 4 of them high · 4 high
2024 12 days, 9 of them high · 9 high
2023 1 day, 1 of them high · 1 high
2022 3 days, 2 of them high · 2 high
2021 4 days, 3 of them high · 3 high patchy data

Counted from each day's highest reading. Days with missing or implausible readings are left out, so a year marked patchy may have run high more often than shown. The darker part is days above 0.55 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 7 flood areas linked to this gauge (nearest 0.1 km away).

2flood warnings 26flood alerts

Most recent flood warning: 9 Feb 2024 — River Hart at Crondall

Year by year
YearWarningsAlerts
2025 0 2
2024 2 4
2023 0 2
2021 0 1
2020 0 3
2019 0 2
2018 0 1
2016 0 3
2015 0 2
2014 0 5
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 Crondall flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 7 areas linked to this gauge, nearest first.

Frequently asked questions

Is the River Hart at Crondall Bridge flooding today?

The current level is 0.10m, which is within the typical range of 0.09 to 0.49m. Flooding is unlikely at this level.

Is the river level rising or falling at Crondall Bridge?

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 River Hart at Crondall Bridge?

The typical range at this station is 0.09m to 0.49m, based on Environment Agency historical data. Levels above 0.49m 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 →