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Home › Rivers › River Kennet

River Kennet water levels

Live levels from 6 monitoring stations across Reading, West Berkshire, Wiltshire, updated every 15 minutes.

6stations
0above typical high

Gauges

Monitoring stations, source to mouth

StationTownLevel nowStatusTrend
Winterborne MonktonWinterbourne Monkton-0.12 mASD 30m agoLow—
16.9 km by river
MarlboroughMarlborough0.04 mASD 30m agoNormal—
13.5 km by river
Knighton SidestructureWhittonditch-0.13 mASD 30m agoLow—
downstream, distance by river not measured
NewburyNewbury1.01 mASD 30m agoNormal—
26.4 km by river
Reading Calcot BridgeCalcot1.87 mASD 30m agoLow—
9.1 km by river
Blakes LockstructureReading0.06 mASD 30m agoNormal—

Stations are listed from source to mouth as the water flows, traced on the river map (OS Open Rivers) and the Environment Agency’s own links between its gauges. A distance “by river” is along the river, and is shown only where the map traces the path.

Contains OS data © Crown copyright and database rights 2026.

Gauged tributaries

Streams and rivers with a gauge whose water joins the Kennet above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.

4 gauged tributaries, 8 gauges

River Og

Joins the Kennet between Marlborough and Knighton Side, no more than 12.7 km by river above Knighton Side.

Poulton Farmstructure0.07 mASD 30m agoNormal

Its water passes Knighton Side and every gauge below it on the Kennet. It does not pass Marlborough or the gauges above it.

River Enborne

Joins the Kennet between Newbury and Reading Calcot Bridge, no more than 14.9 km by river above Reading Calcot Bridge.

Brimptonstructure0.10 mASD 30m agoNormal

Its water passes Reading Calcot Bridge and every gauge below it on the Kennet. It does not pass Newbury or the gauges above it.

Gauged streams joining the Enborne

River Lambourn

Joins the Kennet between Newbury and Reading Calcot Bridge, no more than 26.5 km by river above Reading Calcot Bridge.

Lambourn0.79 mASD 1h agoNormal
1.9 km by river
Eastbury Flood Control Structurestructure0.82 mASD 45m agoLow
20.4 km by river
Shaw1.35 mASD 45m agoNormal

Its water passes Reading Calcot Bridge and every gauge below it on the Kennet. It does not pass Newbury or the gauges above it.

Gauged streams joining the Lambourn

Foudry Brook

Joins the Kennet between Reading Calcot Bridge and Blakes Lock, no more than 11.0 km by river above Blakes Lock.

Beech Hill0.77 mASD 30m agoNormal

Its water passes Blakes Lock and every gauge below it on the Kennet. It does not pass Reading Calcot Bridge or the gauges above it.

Where the Kennet goes

Below Blakes Lock, its water next reaches Sonning Lock, a gauge on River Thames, 3.5 km by river downstream.

Tributaries and where they join are traced on the river map (OS Open Rivers, edition 2026-04) and the Environment Agency’s links between its gauges. The map holds distances between gauges, not the junctions themselves, so a junction is placed between two gauges, and no further up than the tributary’s own lowest gauge. Contains OS data © Crown copyright and database rights 2026.

Streams without a gauge

Named streams on the river map that flow into the Kennet and have no gauge of their own. Each has a page with what is known about it: the next gauge downstream, and any storm overflows or water-sampling points placed on it.

Storm overflows upstream

11 storm overflows are traced upstream of Blakes Lock, the Kennet’s lowest gauge on the river map: on the Kennet itself, on its gauged tributaries, and on smaller streams that join above there.

  • 0 report discharging now
  • 11 not discharging
  • 0 offline or silent: 0 monitor offline, 0 status unknown, 0 no live feed

Official figures for 2025, for the overflows traced upstream of Blakes Lock: 383 spills over 6,776 hours in total, across all 11.

Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Kennet includes the smaller streams that join it there.

Between Winterborne Monkton and Marlborough1 overflow
Between Marlborough and Knighton Side2 overflows
  • London Road Not discharging
    Thames Water · into Kennet · 12.7 km by river above Knighton Side · 2025: 1 spill, 0.5 h
  • Marlborough WwTW Not discharging
    Thames Water · into Kennet · 11.4 km by river above Knighton Side · 2025: 96 spills, 1,557 h
Between Knighton Side and Newbury1 overflow
  • Kintbury Not discharging
    Thames Water · into Kennet & Avon Canal · 9.0 km by river above Newbury · 2025: 11 spills, 159 h
Between Newbury and Reading Calcot Bridge1 overflow
  • Newbury (New) Not discharging
    Thames Water · into Kennet · 23.0 km by river above Reading Calcot Bridge · 2025: 28 spills, 381 h
River Enborne, above Brimptonjoins the Kennet above Reading Calcot Bridge1 overflow
  • Kingsclere WwTW Not discharging
    Thames Water · into Kingsclere Brook · 9.3 km by river above Brimpton · 2025: 49 spills, 852 h
River Lambourn, above Shawjoins the Kennet above Reading Calcot Bridge2 overflows
  • East Garston Not discharging
    Thames Water · into River Lambourn · 16.9 km by river above Shaw · 2025: 0 spills, 0 h
  • East Shefford WwTW Not discharging
    Thames Water · into River Lambourn · 13.0 km by river above Shaw · 2025: 102 spills, 2,207 h
Between Reading Calcot Bridge and Blakes Lock1 overflow
Foudry Brook, above Beech Hilljoins the Kennet above Blakes Lock2 overflows
  • Silchester WwTW Not discharging
    Thames Water · into Silchester Brook · 10.7 km by river above Beech Hill · 2025: 42 spills, 761 h
  • Mortimer (Stratfield Mortimer) WwTW Not discharging
    Thames Water · into Foudry Brook · 2.7 km by river above Beech Hill · 2025: 40 spills, 689 h

Near these gauges, connection not known

Within 3 km of one of the Kennet’s gauges in a straight line, but the river map cannot say whether their water reaches it.

  • Reading, Blakes Lock Not discharging
    Thames Water · into Holly Brook · 150 m from Blakes Lock in a straight line · no mapped watercourse close enough to be sure · 2025: 0 spills, 0 h
  • Reading, Caversham Not discharging
    Thames Water · into Thames · 960 m from Blakes Lock in a straight line · no mapped watercourse close enough to be sure · 2025: 0 spills, 0 h
  • Ramsbury Wastewater Treatment Works Not discharging
    Thames Water · into River Kennet · 1.0 km from Knighton Side in a straight line · its water cannot be followed on the map · 2025: 0 spills, 0 h
  • Burghfield WwTW Not discharging
    Thames Water · into Clay Hill Brook · 2.5 km from Reading Calcot Bridge in a straight line · its recorded watercourse is not the one mapped beside it · 2025: 34 spills, 655 h

A status is the water company’s own monitor: it says whether an overflow is discharging, never how much or why, and a spill does not by itself explain a change in a river level. A status older than two hours is shown as unknown. Annual figures are the official returns: 12/24-hour spills for England and Wales, overflow events for Scotland (Scottish Water counts differently, so the two cannot be compared). “No data” means the monitor produced no usable data that year, not zero. Overflows are placed on OS Open Rivers (edition 2026-04), which leaves out many small channels: an overflow the map cannot place may still drain here. Contains OS data © Crown copyright and database rights 2026. Sewage in Britain’s rivers →

Live status: © Thames Water storm overflow activity data, licensed under CC BY 4.0. Annual figures for England: Environment Agency Event Duration Monitoring return, © Environment Agency copyright and/or database right, Open Government Licence v3.0.

Water samples

Dated samples taken by the Environment Agency, not live readings. Results are published days to months after the sample is taken, and many points are sampled only a few times a year, or have not been sampled for years.

38 sampling points on the River Kennet and the streams that join it above Blakes Lock, and below it. 29 have a sample from the last 12 months; 34 have any sample banked. Listed from the source down, grouped by the next gauge each one's water reaches.

Above Shaw River Lambourn 7 points
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Lambourn at Cross House, EastburyRiver Lambourn20 km21 Aug 2026 · 48 days agoOxygen 112.3% Jul 2026Temp 13.5 °C Jul 2026pH 8.06 Jul 2026Conductivity 576 µS/cm Jul 2026
Lambourn at Maidencourt FarmRiver Lambourn16 km21 Jul 2026 · 3 months agoOxygen 91.8%Temp 14.2 °CpH 7.75Ammonia below 0.03 mg/l
Lambourn at Gauging Station, East SheffordRiver Lambourn14 km30 Jul 2026 · 2 months agoOxygen 96.4%Temp 14.1 °CpH 7.66Ammonia below 0.03 mg/l
Lambourn downstream of East Shefford sewage treatment worksRiver Lambourn12 km21 Jul 2026 · 3 months agoOxygen 99.9%Temp 13.7 °CpH 7.67Ammonia below 0.03 mg/l
River Lambourn at Easton LodgeRiver Lambourn9.4 km17 Sep 2026 · 21 days agoOxygen 103.3%Temp 12.8 °CpH 7.97Ammonia below 0.03 mg/l
Lambourn upstream of A34River Lambourn2.6 km13 Dec 2024 · 22 months agoOxygen 97.3%Temp 8.9 °CpH 8Ammonia 0.008 mg/l
Lambourn at Shaw Ultrasonic gauging stationRiver Lambourn0.1 km28 Jan 2026 · 8 months agoOxygen 96.5%Temp 8.2 °CpH 7.86Conductivity 591 µS/cm
Above Brimpton River Enborne 7 points
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Enborne at A343, NewburyRiver Enborne17 km21 Jul 2025 · 15 months agoTemp 16.5 °CAmmonia below 0.03 mg/lNitrate 0.646 mg/lPhosphate 0.071 mg/l
Above Newtown Church - Newtown Brookunnamed stream15 km15 Dec 2025 · 10 months agoOxygen 89.7%Temp 8.6 °CpH 7.32Ammonia 0.023 mg/l
Headley GullyEcchinswell Brook12 km17 Dec 2024 · 22 months agoOxygen 98.4%Temp 9.1 °CpH 8.09Ammonia below 0.03 mg/l
Ecchinswell Brook at A339, HeadleyEcchinswell Brook9.8 km4 Sep 2026 · 34 days agoOxygen 79.8%Temp 17.5 °CpH 8.09Ammonia below 0.03 mg/l
Enborne at Thornford Road, HeadleyRiver Enborne8.0 km24 Aug 2026 · 45 days agoOxygen 82.1%Temp 14.1 °CpH 8Ammonia below 0.03 mg/l
Kingsclere Brook below Tan House Farm, HeadleyKingsclere Brook6.6 km24 Aug 2026 · 45 days agoOxygen 89.6%Temp 13.8 °CpH 8.17Ammonia below 0.03 mg/l
Baughurst Brook below Ashford Hill TipBaughurst Brook2.5 km4 Sep 2026 · 34 days agoOxygen 72.8%Temp 17.6 °CpH 7.93Ammonia below 0.03 mg/l
Above Beech Hill Foudry Brook 4 points
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Silchester Brook above Silchester sewage treatment worksSilchester Brook11 km12 May 2026 · 5 months agoOxygen 93.3%Temp 7.9 °CpH 7.87Ammonia below 0.03 mg/l
Downstream of Black LaneWest End Brook7.7 km15 Dec 2025 · 10 months agoOxygen 90.8%Temp 7.8 °CpH 7.6Ammonia 0.097 mg/l
Silchester Brook at Clappers Farm, SilchesterSilchester Brook7.0 km2 Feb 2024 · 2.7 years agopH 7.69
Foudry Brook at Mortimer Railway StationFoudry Brook3.1 km3 Jul 2026 · 3 months agoOxygen 87.8%Temp 16.9 °CpH 7.9Ammonia below 0.03 mg/l
Above Reading Calcot Bridge River Kennet 8 points, 5 with samples
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Lambourn at A4, NewburyRiver Lambourn25 km22 Jul 2026 · 3 months agoOxygen 102.7%Temp 15.8 °CpH 7.96Ammonia below 0.03 mg/l
Kennet at Hambridge Road, NewburyRiver Kennet24 km22 Jul 2026 · 3 months agoOxygen 100.6%Temp 17.3 °CpH 8.03Ammonia below 0.03 mg/l
Kennet at Thatcham Railway StationRiver Kennet19 km17 Jul 2026 · 3 months agoOxygen 95.3%Temp 19.6 °CpH 8.02Ammonia below 0.03 mg/l
Enborne at Gauging Station, BrimptonRiver Enborne15 km2 Jul 2026 · 3 months agoOxygen 76.3%Temp 18 °CpH 7.99Ammonia below 0.03 mg/l
Kennet and Canal at WoolhamptonRiver Kennet13 kmLast sampled 21 Oct 2015, before the imported period
Padworth Stream at Bridge 368, Padworthunnamed stream9.1 kmLast sampled 5 Jul 2007, before the imported period
Padworth Gullyunnamed stream9.0 kmLast sampled 14 Dec 2022, before the imported period
Kennet at Ufton BridgeRiver Kennet6.1 km20 May 2026 · 5 months agoOxygen 100.2%Temp 13.7 °CpH 8.07Ammonia 0.031 mg/l
Above Blakes Lock River Kennet 6 points, 5 with samples
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Clay Hill Brook above Burghfield sewage treatment worksClayhill Brook11 km17 Jul 2026 · 3 months agoOxygen 96.4% May 2026Temp 9.6 °C May 2026pH 7.58 May 2026Ammonia 0.03 mg/l May 2026
Clay Hill Brook below Burghfield sewage treatment worksClayhill Brook10 kmLast sampled 16 Mar 2018, before the imported period
Foudry Brook at Hartley Court Farm, GrazelyFoudry Brook6.2 km2 Dec 2025 · 10 months agoOxygen 87.3%Temp 8.9 °CpH 7.8Ammonia below 0.03 mg/l
Burghfield Brook above Foudry BrookBurghfield Brook6.2 km18 Aug 2026 · 51 days agoOxygen 79.3% Dec 2025Temp 8.8 °C Dec 2025pH 7.58 Dec 2025Ammonia 0.039 mg/l Dec 2025
M upstream of County LockRiver Kennet2.0 km4 Dec 2023 · 2.8 years agoOxygen 93.9%Temp 7.4 °CpH 7.72Ammonia below 0.03 mg/l
Kennet at Berkeley Avenue, ReadingRiver Kennet1.8 km17 Jul 2026 · 3 months agoOxygen 97.3%Temp 22.1 °CpH 7.99Ammonia below 0.03 mg/l
Above Marlborough River Kennet 1 point
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Kennet downstream Swallowhead SpringsRiver Kennet11 km21 Aug 2026 · 48 days agoOxygen 43% Jun 2026Temp 13.6 °C Jun 2026pH 7.24 Jun 2026Conductivity 644 µS/cm Jun 2026
Above Poulton Farm River Og 1 point
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Og at Chantry MeadowRiver Og5.4 km21 Aug 2026 · 48 days agoOxygen 80% May 2026Temp 12.1 °C May 2026pH 7.27 May 2026Conductivity 712 µS/cm May 2026
Above Knighton Side River Kennet 3 points
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Kennet at Gauging Station, MarlboroughRiver Kennet14 km8 Sep 2026 · 30 days agoOxygen 84.3%Temp 12.7 °CpH 7.49Ammonia below 0.03 mg/l
Og 100 m above KennetRiver Og12 km8 Sep 2026 · 30 days agoOxygen 81.2%Temp 12 °CpH 7.54Ammonia 0.036 mg/l
Kennet at Stitchcombe MillRiver Kennet8.0 km17 Sep 2026 · 21 days agoOxygen 80.9%Temp 12.8 °CpH 7.88Ammonia below 0.03 mg/l
Below Blakes Lock 1 point
Sampling pointWatercourse (map)Below the gaugeLast sampleLatest results (river water)
Kennet 100 m above ThamesRiver Kennet0.3 km14 Aug 2026 · 55 days agoOxygen 88.5%Temp 21.5 °CpH 7.91Ammonia 0.088 mg/l

Distances are along the river to the gauge named. England's samples only.

FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.

Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.

Contains OS data © Crown copyright and database rights 2026.

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