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Live levels from 2 monitoring stations across Wiltshire, updated every 15 minutes.
| Station | Level now | Status | ||
|---|---|---|---|---|
| Fosseway | 0.17 m 49m ago | Normal | ||
| 7.4 km by river | ||||
| St Johns Weirstructure | 0.09 mASD 34m 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 Sherston Avon 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.
No gauged tributary joins the Sherston Avon above St Johns Weir on the river map. Streams without a gauge are not counted here.
Below St Johns Weir, its water next reaches Great Somerford, a gauge on River Avon, 7.9 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.
7 storm overflows are traced upstream of St Johns Weir, the Sherston Avon’s lowest gauge on the river map: on the Sherston Avon itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of St Johns Weir: 171 spills over 2,155 hours in total, across all 7.
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 Sherston Avon includes the smaller streams that join it there.
Within 3 km of one of the Sherston Avon’s gauges in a straight line, but the river map cannot say whether their water reaches it.
8 other overflows within 3 km of these gauges are placed below the Sherston Avon’s lowest gauge or on another river, so not listed.
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.
10 sampling points on the Sherston Avon and the streams that join it above St Johns Weir. 1 has a sample from the last 12 months; 5 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) |
|---|---|---|---|---|
| Luck. Brook Brook House | Luckington Brook | 9.1 km | Last sampled 3 Apr 2017, before the imported period | |
| Luckington Brook at Brook End | Luckington Brook | 8.8 km | 4 Dec 2025 · 10 months ago | Oxygen 90.4%Temp 9.1 °CpH 7.9Ammonia 0.087 mg/l |
| Luckington Brook Brookend | Luckington Brook | 8.4 km | Last sampled 6 Dec 2013, before the imported period | |
| Avon Stan Bridge | Shallow Brook | 8.0 km | Last sampled 24 May 2017, before the imported period | |
| Avon Sherston | River Avon (Sherston Branch) | 6.1 km | 15 Mar 2024 · 2.6 years ago | Oxygen 90%Temp 9.9 °CpH 7.8Ammonia 0.031 mg/l |
| Avon Easton Town Bridge | River Avon (Sherston Branch) | 5.2 km | Last sampled 27 Jul 2017, before the imported period |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Plain Farm tributary, Sherston Parva - Plain | unnamed stream | 8.1 km | 11 Dec 2024 · 22 months ago | Oxygen 87.2%Temp 7.4 °CpH 7.77Ammonia 0.027 mg/l |
| Norton Brook Foxley Green | Norton Brook | 6.4 km | Last sampled 14 Sep 2015, before the imported period | |
| Cowage Farm tributary of Sherston Avon | Norton Brook | 5.4 km | 13 Dec 2023 · 2.8 years ago | Oxygen 96.2%Temp 9.3 °CpH 7.9Ammonia below 0.03 mg/l |
| Avon Westport | River Avon (Sherston Branch) | 1.2 km | 1 Mar 2024 · 2.6 years ago | Oxygen 95.3%Temp 8.4 °CpH 7.97Ammonia 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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