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0.41

Crondall Pond

Hart 🌊 Tidal
Loddon catchment • Crondall • Hampshire • ID: 2451TH • Level
This gauge is tidally influenced — levels rise and fall with each tide, so rapid changes here are normal and don't necessarily indicate flooding.
(30m ago) • 1 reading/hr • 146 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
0.406 mASD
▬ Steady
24h Max
0.406 mASD
24h Min
0.395 mASD
Typical Range
-0.35 - 0.80
mASD
Highest Recorded
1.19 mASD
EA official record
A 2.07 reading (24 Sep 2026) sits in our unverified raw history and is not treated as the record
Current level is 34% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Flood predictions aren't generated for tidal gauges — their levels are driven by the tide, not by catchment rainfall, so the forecast models would have no skill here.

Recent Readings

Rising · +0.2 cm over 9h
08 Oct 20:00 ▲ +0.5 cm 0.406 mASD
08 Oct 16:00 ▬ steady 0.401 mASD
08 Oct 15:45 ▲ +0.1 cm 0.401 mASD
08 Oct 15:30 ▼ -0.2 cm 0.400 mASD
08 Oct 15:15 ▬ steady 0.402 mASD
08 Oct 15:00 ▼ -0.1 cm 0.402 mASD
08 Oct 14:45 ▬ steady 0.403 mASD
08 Oct 14:30 ▬ steady 0.403 mASD
08 Oct 14:15 ▬ steady 0.403 mASD
08 Oct 14:00 ▲ +0.1 cm 0.403 mASD
08 Oct 13:45 ▼ -0.2 cm 0.402 mASD
08 Oct 13:30 ▲ +0.1 cm 0.404 mASD
08 Oct 13:15 ▼ -0.1 cm 0.403 mASD
08 Oct 13:00 ▬ steady 0.404 mASD
08 Oct 12:45 ▬ steady 0.404 mASD
08 Oct 12:30 ▬ steady 0.404 mASD
08 Oct 12:15 ▲ +0.1 cm 0.404 mASD
08 Oct 12:00 ▼ -0.1 cm 0.403 mASD
08 Oct 11:45 ▬ steady 0.404 mASD
08 Oct 11:30 0.404 mASD

Station Details

  • Monitoring Station: Crondall Pond
  • Watercourse: River Hart
  • Nearest Town: Crondall
  • County: Hampshire
  • Coordinates: 51°13'58"N 0°51'51"W (51.232867, -0.864146)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 2005
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 2451TH
  • RLOI id: 7145 (the EA's check-for-flooding station id)
  • EA Gauge ID: 2451TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 398 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: 🌊 Yes — levels follow the tide
  • Lock / structure: No
  • Catchment Area: Loddon
  • Datum: 84.000m AOD
  • Typical Range: -0.350 – 0.800 mASD
  • EA Cross-check: 0.40 mASD (EA at 8 Oct 16:00)

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 downstream

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 0.80 m on about 8 days. This year so far: 2 days.

2026 2 days so far
2025 9 days
2024 0 days
2023 11 days
2022 1 day
2021 0 days
2020 46 days
2019 3 days
2018 0 days
2017 0 days

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 0.0 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 6 areas linked to this gauge, nearest first.

Frequently asked questions

Is the River Hart at Crondall Pond flooding today?

The current level is 0.41m, which is within the typical range of -0.35 to 0.80m. Flooding is unlikely at this level.

Is the river level rising or falling at Crondall Pond?

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 Pond?

The typical range at this station is -0.35m to 0.80m, based on Environment Agency historical data. Levels above 0.80m 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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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 →