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⚠ Sensor unreliable — readings not validated
-27.66

Downham Lane

Spring Brook
London catchment • Grove Park • Greater London • ID: 4327TH • Level
(24m ago) • 4 readings/hr • 143 views
⚠
Sensor data may be unreliable — recent readings are physically implausible for this gauge (far outside its normal range). Treat the level shown with caution; the EA may be reporting a faulty sensor.
stuck at error value -27.654–-27.639 mASD (readings flow, daily summaries stalled since 2026-03-23)

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Current Level
-27.660 mASD
Trend unavailable
24h Max
-
24h Min
-
Typical Range
0.39 - 0.45
mASD
Highest Recorded
1.74 mASD
EA official record
0.64 in our data (since Nov 2012)
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Station Details

  • Monitoring Station: Downham Lane
  • Watercourse: Spring Brook
  • Nearest Town: Grove Park
  • County: Greater London
  • Coordinates: 51°25'27"N 0°0'11"W (51.424134, -0.003161)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 2007
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 4327TH
  • RLOI id: 7316 (the EA's check-for-flooding station id)
  • EA Gauge ID: 4327TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 54 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: London
  • Datum: 28.000m AOD
  • Typical Range: 0.391 – 0.454 mASD
  • EA Cross-check: -27.66 mASD (EA at 10 Oct 01:15)

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.

Nearby

Rainfall & Weather

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How often this river runs high

In a typical year this gauge reaches its typical high of 0.45 m on about 30 days.

2022 0 days patchy data
2021 18 days patchy data
2020 14 days
2019 34 days, 3 of them high · 3 high
2018 46 days, 3 of them high · 3 high
2017 24 days

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 0.86 m, the level this gauge tops only a few days a year.

Flood history near this gauge

Official Environment Agency warnings issued since 2011 for the 10 flood areas linked to this gauge (nearest 0.5 km away).

9flood warnings 96flood alerts

Most recent flood warning: 27 Sep 2024 — Chaffinch Brook and St James Stream at Elmers End

Year by year
YearWarningsAlerts
2026 0 3
2025 0 3
2024 2 8
2023 0 2
2022 1 9
2021 1 12
2020 1 6
2019 1 8
2018 0 8
2017 0 8
2016 1 5
2015 0 2
2014 0 8
2013 2 6
2012 0 7
2011 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 Grove Park flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 10 areas linked to this gauge, nearest first.

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Frequently asked questions

Is the Spring Brook at Downham Lane flooding today?

The current level is -27.66m, which is below the typical range. Flooding is very unlikely at this level.

What is a normal level for the Spring Brook at Downham Lane?

The typical range at this station is 0.39m to 0.45m, based on Environment Agency historical data. Levels above 0.45m 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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