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You'll be notified when this gauge is rising more than 0.10 m/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.
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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
0.241 mASD
▬ Steady
24h Max
0.242 mASD
24h Min
0.241 mASD
Typical Range
0.28 - 1.30
mASD
Highest Recorded
2.18 mASD
EA official record
2.18 in our data (since Aug 1984)
Current level is 11% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
EA forecast (official)
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. The shaded band is its 10–90% range, widened so that about 80% of recent outcomes fall inside it.
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.
Flow Data: Daily mean flow (m³/s) to 6 Oct (2 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional)via EA Hydrology
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.
Dwr Cymru Welsh Water · into Afon Lliw · 4.8 km away in a straight line · its recorded watercourse is not the one mapped beside it
Not discharging now · last
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 →
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 Byton flood history.
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.
🌊 Mixed responseA balance of quick runoff and slower groundwater baseflow.
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
0.59
mixed response
Avg Annual Rainfall
1,086 mm/yr
1991–2020 · +2% since 1941–70
Urban Extent
0.1%
largely rural
Median Annual Flood
26.74 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
70.90 m³/s
16 Feb 2020 · daily mean, not the instantaneous peak
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.
Flat V Crump profile weir. Runoff reduced by groundwater abstraction for PWS.
More detail
The catchment
Headwaters drain Radnor Forest - underlain by Silurian bedrock. Impermeable formations are covered by extensive alluvial gravel deposits in the valleys. Predominantly grassland catchment supporting rough grazing, with some forestry.
The station
Flat V weir Crump profile weir, 1:20 cross-slopes, 12.5m wide constructed in 1971. Pre-1971, station was natural river section with stable riffle control. Above 2m left bank overtopped, right bank is steep cliff.
How it measures flow
Some shoaling u/s. Multiple ratings applied through the period of record.
Flow regime
Aquifer provides significant baseflow and moderates flood peaks. Runoff reduced by groundwater abstraction for PWS.
The flow record
Ratings reviewed in 2022 and data reprocessed from 1981. Full period of record peak flow data reviewed and released in September 2023 (WINFAP Files v12).
Timing, not cause. Gauges can move together simply because the same rain fell on both.
Frequently asked questions
Is the River Lugg at Byton flooding today?
The current level is 0.24m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Byton?
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 Lugg at Byton?
The typical range at this station is 0.28m to 1.30m, based on Environment Agency historical data. Levels above 1.30m 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: