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Live levels from 3 monitoring stations across West Berkshire, updated every 15 minutes.
| Station | Level now | Status | ||
|---|---|---|---|---|
| Lambourn | 0.79 mASD 3h ago | Normal | ||
| 1.9 km by river | ||||
| Eastbury Flood Control Structurestructure | 0.82 mASD 1h ago | Low | ||
| 20.4 km by river | ||||
| Shaw | 1.36 mASD 28m ago | Normal | ||
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.
Streams and rivers with a gauge whose water joins the Lambourn above one of its gauges, from the source down. The river map knows where gauges are, not every stream, so a tributary without a gauge is not listed here.
Joins the Lambourn between Eastbury Flood Control Structure and Shaw, no more than 3.0 km by river above Shaw.
| Bagnor | 0.05 mASD 28m ago | Normal |
Its water passes Shaw and every gauge below it on the Lambourn. It does not pass Eastbury Flood Control Structure or the gauges above it.
Below Shaw, its water next reaches Reading Calcot Bridge, a gauge on River Kennet, 26.5 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.
2 storm overflows are traced upstream of Shaw, the Lambourn’s lowest gauge on the river map: on the Lambourn itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Shaw: 102 spills over 2,207 hours in total, across all 2.
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 Lambourn includes the smaller streams that join it there.
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.
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.
8 sampling points on the River Lambourn and the streams that join it above Shaw, and below it. 7 have a sample from the last 12 months; 8 have any sample banked. Listed from the source down, grouped by the next gauge each one's water reaches.
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Lambourn at Cross House, Eastbury | River Lambourn | 20 km | 21 Aug 2026 · 48 days ago | Oxygen 112.3% Jul 2026Temp 13.5 °C Jul 2026pH 8.06 Jul 2026Conductivity 576 µS/cm Jul 2026 |
| Lambourn at Maidencourt Farm | River Lambourn | 16 km | 21 Jul 2026 · 3 months ago | Oxygen 91.8%Temp 14.2 °CpH 7.75Ammonia below 0.03 mg/l |
| Lambourn at Gauging Station, East Shefford | River Lambourn | 14 km | 30 Jul 2026 · 2 months ago | Oxygen 96.4%Temp 14.1 °CpH 7.66Ammonia below 0.03 mg/l |
| Lambourn downstream of East Shefford sewage treatment works | River Lambourn | 12 km | 21 Jul 2026 · 3 months ago | Oxygen 99.9%Temp 13.7 °CpH 7.67Ammonia below 0.03 mg/l |
| River Lambourn at Easton Lodge | River Lambourn | 9.4 km | 17 Sep 2026 · 21 days ago | Oxygen 103.3%Temp 12.8 °CpH 7.97Ammonia below 0.03 mg/l |
| Lambourn upstream of A34 | River Lambourn | 2.6 km | 13 Dec 2024 · 22 months ago | Oxygen 97.3%Temp 8.9 °CpH 8Ammonia 0.008 mg/l |
| Lambourn at Shaw Ultrasonic gauging station | River Lambourn | 0.1 km | 28 Jan 2026 · 8 months ago | Oxygen 96.5%Temp 8.2 °CpH 7.86Conductivity 591 µS/cm |
| Sampling point | Watercourse (map) | Below the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Lambourn at A4, Newbury | River Lambourn | 1.8 km | 22 Jul 2026 · 3 months ago | Oxygen 102.7%Temp 15.8 °CpH 7.96Ammonia below 0.03 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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