Lower Lee catchment
• Edmonton • England • ID: 5357TH • Level
(21m ago) • 4 readings/hr • 138 views
Set water level alerts
Get notified about Edmonton Green — tick as many as you like, they all share the notify settings below.
Alert me when (tick one or more)
⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
Height for "Above a height"
Drag the line on the chart, or type a value:mASD
Quick pick:
You'll be notified when this gauge is rising more than 0.10 mASD/hr — a sign of rapidly increasing water levels.
You'll be notified when a new storm-overflow (sewage) discharge starts within ~3 km of this gauge, based on the water companies' near-real-time feeds.
Notify by (tick one or more)
Your browser will ask permission, then you'll get a notification even when FloodRadar isn't open.
On iPhone: tap Share → Add to Home Screen first, then open it from there and set the alert.
Each one is saved as its own alert — pause or remove them individually any time.
Not an emergency service — if in danger call 999. Alerts rely on
EA/SEPA data and are best-efforts. Terms
Current Level
0.049 mASD
▬ Steady
24h Max
0.050 mASD
24h Min
0.045 mASD
Typical Range
0.07 - 0.80
mASD
Highest Recorded
1.71 mASD
14 Feb 2020
Since Jan 1982
Current level is 3% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. Shown with its calibrated 10–90% confidence band. Under evaluation —
not yet promoted, so treat as a second opinion.
River Flow
90 days
Daily mean discharge (m³/s) with the daily min–max band, from the EA Hydrology API. Flow is the volume of water passing the gauge — often a more direct flood signal than level.
Long Term
🌍 floodradar.co.uk
—
Consecutive rainy days0 → 10+
Days Above Normal
This year vs 5-year monthly range
Recent Readings
Steady over 6h
24 Aug 00:30▬ steady0.049 mASD
24 Aug 00:15▬ steady0.049 mASD
24 Aug 00:00▬ steady0.049 mASD
23 Aug 23:45▬ steady0.049 mASD
23 Aug 23:30▬ steady0.049 mASD
23 Aug 23:15▬ steady0.049 mASD
23 Aug 23:00▲ +0.1 cm0.049 mASD
23 Aug 22:45▲ +0.1 cm0.048 mASD
23 Aug 21:30▬ steady0.047 mASD
23 Aug 21:15▬ steady0.047 mASD
23 Aug 21:00▬ steady0.047 mASD
23 Aug 20:45▼ -0.1 cm0.047 mASD
23 Aug 20:30▲ +0.1 cm0.048 mASD
23 Aug 20:15▬ steady0.047 mASD
23 Aug 20:00▼ -0.1 cm0.047 mASD
23 Aug 19:45▲ +0.1 cm0.048 mASD
23 Aug 19:30▼ -0.1 cm0.047 mASD
23 Aug 19:15▬ steady0.048 mASD
23 Aug 19:00▬ steady0.048 mASD
23 Aug 18:450.048 mASD
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2009 for the 8 flood
areas linked to this gauge (nearest 0.5 km away).
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 Edmonton flood history.
Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.
Catchment Character
🌊 Urban & flashyHeavily built-up — rain runs off hard surfaces fast, so levels can spike within hours of heavy rain.
Your catchment is all the land that drains rainfall into the river above this gauge. Its character — how
steep, wet, wooded, urban or chalky that land is — decides how fast rain here turns into a rising river. A steep, bare or clay
catchment is “flashy” (rises and falls quickly, floods easily); a flat, chalk or well-wooded one is
slow and steady. The tiles below put numbers to that; the flow-duration curve reads left-to-right
from the river’s typical high flows (Q5) down to its low flows (Q95) — a steep curve means a flashy river.
The physical character of the land that drains to this gauge, and how it shapes its flood response — from the National River Flow Archive (UKCEH).
Baseflow Index
0.26
flashy — rain runs off fast
Avg Annual Rainfall
680 mm/yr
1991–2020 · +4% since 1941–70
Urban Extent
29%
heavily urbanised
Highest Recorded Flow
5.35 m³/s
29 Oct 2000
Flow-Duration Curve
Daily flow (m³/s) exceeded each % of the time — a steep curve is flashy, a flat one is steady. Q5 high · Q50 median · Q95 low.
Land Cover (2023)
Woodland 9%Grassland 36%Arable 15%Urban 40%
Flow affected by: public water supply.
Photos
Gauging-station photographs from the National River Flow Archive (UKCEH).
The gauging station is located on Salmon Brook, a tributary that enters the lower River Lee system in North London.
More detail
The catchment
Impervious (London Clay) catchment. Salmon Brook rises on Enfield Chase and in the lower reaches the catchment is heavily urbanised.
The station
Flat V weir (1:10 cross-slope), 5m wide (insensitive at low flows) in a slightly trapezoidal section. It superseded a less effective (particularly at very low flows) compound broad-crested structure in 1980.
How it measures flow
Backing-up behind the d/s culvert can (rarely) result in drowning during flood conditions.
Flow regime
No significant abstractions or discharges are associated with Salmon Brook. Very similar minimum flows occurred during the 1964 and 1959 droughts.
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Flat-V weir
Operating since
1956
Station datum
12.4 mAOD
Flow record
1956–2024 · 68 yrs · 99% complete
Hydrometric area
38
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
🚽 Storm overflows on this river
Frequently asked questions
Is the Salmon Brook at Edmonton Green flooding today?
The current level is 0.05m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Edmonton Green?
Based on the most recent readings, the level is currently steady. The chart above shows the last 7 days of measurements, updated roughly every 15 minutes.
What is a normal level for the Salmon Brook at Edmonton Green?
The typical range at this station is 0.07m 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 taken by the Environment Agency gauge roughly every 15 minutes and FloodRadar refreshes its data continuously, so the level shown is normally less than an hour old.
Embed this gauge on your website
Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.
Preview
📮 Flood risk by postcode near this gauge
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
