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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
Height for "Above a height"
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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
0.545 mASD
▬ Steady
24h Max
0.555 mASD
24h Min
0.544 mASD
Typical Range
0.58 - 1.85
mASD
Highest Recorded
3.58 mASD
EA official record
3.57 in our data (since May 1983)
Current level is 15% of this
Current Flow
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🚽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
Storm overflows whose water reaches this gauge on the mapped river network, nearest first by distance along the river. The status is each water company's monitor: it says whether an overflow is discharging, not how much or what it contains.
137 storm overflows are traced upstream of this gauge, the nearest 1.7 km away along the river. 0 report discharging now, 132 report not discharging, and for 5 the monitor is offline or has not reported, so their status is not known.
Severn Trent Water · into Littleover Brook (Culverted) · 1.1 km away in a straight line · its watercourse is not on the river map
1 spill · 0 hours in 2025
Not discharging now · last
22 more within 6 km whose connection is not known.
23 other overflows within 6 km are downstream of this gauge or on another branch of the river network, so they are 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 Derby flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 30 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
0.55
mixed response
Avg Annual Rainfall
1,073 mm/yr
1991–2020 · +6% since 1941–70
Urban Extent
3.1%
partly urbanised
Median Annual Flood
136 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
334 m³/s
10 Dec 1965 · 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.
Ten-channel, interleaved cross path US gauge in the centre of Derby. Replaced Longbridge Weir (28010, 1935-1986) - combined record held at St Marys Bridge.
More detail
The catchment
Large, predominantly upland catchment draining Millstone Grit and Carboniferous Limestone. Lower reaches drain Coal Measures on the Lb and Triassic sandstones and marls on the Rb. Peat moorland headwaters; forestry, pasture and some arable. Contains the towns of Matlock and Buxton.
The station
Ten-channel, interleaved cross path US gauge in the centre of Derby, 0.5km upstream of Longbridge Weir (28010) which it replaced. Opened in 1984, ultrasonic gauge reconfigured in March 1993. Record combined with 28010 (a long, curved broad-crested masonry weir with complex rating history, very insensitive).
How it measures flow
Negligible bypassing. Two ratings shown are applied to Longbridge Weir record, the most recent valid from August 1970 when the weir was narrowed. Station is ultrasonic thereafter.
Flow regime
Substantial flow modification owing to Derwent reservoirs, mill operations (particularly before 1970s), and PWS abstractions.
The flow record
Following statistical assessment of continuity, mean and peak flow record shown are a combination of 28010 (Longbridge Weir) to 1986, and St Marys Bridge thereafter; POT thresholds prior to merge were 105.667 and 69.256 cumecs respectively. Chart and UKCEH POT date ranges are for 28010. Some Longbridge AMAX events pre-1985 are of a smaller magnitude than daily mean flows as instantaneous data have been re-processed following rating review. Continuous 15-minute data are awaiting digitisation and re-processing. Full period of record peak flow data reviewed and released in September 2022 (WINFAP Files v11).
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Ultrasonic
Operating since
1936
Station datum
44.0 mAOD
Flow record
1935–2024 · 89 yrs · 100% complete
Peak-flow record
since 1983
Hydrometric area
28
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
Frequently asked questions
Is the River Derwent at Derby City flooding today?
The current level is 0.55m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Derby City?
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.
Why is the level slowly falling?
When little or no rain has fallen for a while, a river level gradually drops as the water stored in the ground and soil drains away with nothing to replace it. This is called baseflow recession and is normal in dry spells. Only about 5.2mm of rain has fallen nearby in the last 7 days, so the flow is being sustained mainly by groundwater. A gentle decline like this is expected and is not a sign of a problem — downstream gauges often recede a little faster than headwaters further upstream, and levels recover once rain returns.
What is a normal level for the River Derwent at Derby City?
The typical range at this station is 0.58m to 1.85m, based on Environment Agency historical data. Levels above 1.85m 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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