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Live levels from 2 monitoring stations across Somerset, updated every 15 minutes.
| Station | Level now | Status | ||
|---|---|---|---|---|
| Bradney | 2.61 mAOD 21m ago | Normal | ||
| 3.7 km by river | ||||
| Dunball | 2.62 mAOD 21m 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 Kings Sedgemoor Drain 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 Kings Sedgemoor Drain above Dunball on the river map. Streams without a gauge are not counted here.
Below Dunball, its water next reaches Dunball Tidal, a gauge on River Parrett, 160 m 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.
5 storm overflows are traced upstream of Dunball, Kings Sedgemoor Drain’s lowest gauge on the river map: on Kings Sedgemoor Drain itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Dunball: 173 spills over 3,316 hours in total, across all 5.
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 Kings Sedgemoor Drain includes the smaller streams that join it there.
Within 3 km of one of Kings Sedgemoor Drain’s gauges in a straight line, but the river map cannot say whether their water reaches it.
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.
11 sampling points on the Kings Sedgemoor Drain and the streams that join it above Dunball. 6 have a sample from the last 12 months; 7 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) |
|---|---|---|---|---|
| River Cary at Dimmer Bridge | River Cary | 44 km | 13 May 2026 · 5 months ago | Oxygen 105.5%Temp 12.2 °CpH 8.16Ammonia below 0.03 mg/l |
| River Cary downstream of Castle Cary sewage treatment works | River Cary | 43 km | Last sampled 1 Mar 2022, before the imported period | |
| River Cary downstream of North Barrow Brook | River Cary | 40 km | 6 Aug 2026 · 2 months ago | pH 8.2 |
| River Cary at East of Rubbery Farm | River Cary | 37 km | 21 Sep 2026 · 17 days ago | Oxygen 75.7%Temp 15.6 °CpH 7.76Ammonia below 0.03 mg/l |
| Dyke Brook | Dyke Brook | 34 km | 3 Aug 2026 · 2 months ago | Oxygen 63.9% Jul 2026Temp 14.2 °C Jul 2026pH 7.49 Jul 2026Ammonia 0.13 mg/l Jul 2026 |
| River Cary at Popple Bridge | River Cary | 28 km | Last sampled 20 Mar 2019, before the imported period | |
| River Cary upstream of Lytes Cary | River Cary | 27 km | 17 Dec 2024 · 22 months ago | Oxygen 75.3%Temp 8.8 °CpH 7.9Ammonia 0.12 mg/l |
| River Cary at Etsome Farm | River Cary | 18 km | 21 May 2026 · 5 months ago | Oxygen 100.7%Temp 16.4 °CpH 7.53Ammonia 0.037 mg/l |
| 18FT Rhyne Lower Nythe Farm | Eighteen Feet Rhyne | 10 km | 11 Sep 2026 · 27 days ago | Oxygen 78.3%Temp 17.9 °CpH 7.68Ammonia below 0.03 mg/l |
| Langacre Rhyne at A361 | Langacre Rhyne | 8.0 km | Last sampled 24 Apr 2014, before the imported period | |
| Moorlinch 1 | Moorlinch Rhyne | 5.7 km | Last sampled 16 Nov 2012, before the imported period |
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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