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Live levels from 2 monitoring stations across Wiltshire, updated every 15 minutes.
| Station | Level now | Status |
|---|---|---|
| Middlehill | 0.16 mASD 43m ago | Low |
These gauges are filed under the By Brook, but the river map places them on another watercourse, so they are not in By Brook’s order above.
| West Kingtonon Broadmead Brook | -0.02 m 43m ago | Low | ||
| Its water joins By Brook above Middlehill, 21.4 km by river. | ||||
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 By Brook above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
Joins By Brook above Middlehill, its highest gauge, no more than 21.4 km by river above Middlehill.
| West Kington | -0.02 m 43m ago | Low |
Its water passes every gauge on By Brook, from Middlehill down.
Below Middlehill, its water next reaches Bathford, a gauge on River Avon, 4.7 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.
6 storm overflows are traced upstream of Middlehill, By Brook’s lowest gauge on the river map: on By Brook itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Middlehill: 219 spills over 962 hours in total, across all 6.
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 By Brook 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: © Wessex 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.
9 sampling points on the By Brook and the streams that join it above Middlehill, and below it. 2 have a sample from the last 12 months; 4 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) |
|---|---|---|---|---|
| Broadmead Brook | Broadmead Brook | 19 km | Last sampled 23 Jun 2017, before the imported period | |
| By Brook Fosse | By Brook | 19 km | 18 Jun 2024 · 2.3 years ago | Oxygen 90.7%Temp 11.7 °CpH 7.48Conductivity 673 µS/cm |
| By Brook Castle Coombe | By Brook | 16 km | Last sampled 27 Feb 2017, before the imported period | |
| Doncombe Brook Fosseway | Doncombe Brook | 16 km | 18 Jun 2024 · 2.3 years ago | Oxygen 101.7%Temp 15.4 °CpH 8.38Conductivity 686 µS/cm |
| By Brook upstream of Long Dean sewage treatment works | By Brook | 15 km | 13 May 2026 · 5 months ago | Oxygen 112.9%Temp 12.2 °CpH 8.42Ammonia below 0.03 mg/l |
| By Brook Long Dean Mill | By Brook | 14 km | Last sampled 23 Jun 2017, before the imported period | |
| Doncombe Brook at Ford | Doncombe Brook | 12 km | Last sampled 25 Jun 2019, before the imported period | |
| By Brook Drewetts Mill | By Brook | 3.0 km | Last sampled 14 Mar 2017, before the imported period |
| Sampling point | Watercourse (map) | Below the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| By Brook Bathford | By Brook | 4.5 km | 11 Sep 2026 · 27 days ago |
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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