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Home › Rivers › River Onny

River Onny water levels

Live levels from 1 monitoring station across Shropshire, updated every 15 minutes.

1stations
0above typical high

Gauges

Monitoring stations, source to mouth

StationTownLevel nowStatusTrend
OniburyOnibury0.75 mASD 47m 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 Onny above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.

1 gauged tributary, 1 gauge

Field Drain

Joins the Onny above Onibury, its highest gauge, no more than 5.4 km by river above Onibury.

Craven Armstidal-0.22 mASD 6h agoNormal

Its water passes every gauge on the Onny, from Onibury down.

Where the Onny goes

Below Onibury, its water next reaches Ludlow Teme, a gauge on River Teme, 11.5 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 Onny 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

1 storm overflow is traced upstream of Onibury, the Onny’s lowest gauge on the river map: on the Onny itself, on its gauged tributaries, and on smaller streams that join above there.

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

Official figures for 2025, for the overflow traced upstream of Onibury: 19 spills over 34 hours.

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 Onny includes the smaller streams that join it there.

Above Onibury, the Onny’s highest gauge1 overflow
  • Craven Arms - Stokesay CSO Not discharging
    Severn Trent Water · into River Onny · 4.0 km by river above Onibury · 2025: 19 spills, 34 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: © Severn Trent 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.

26 sampling points on the River Onny and the streams that join it above Onibury, and below it. 13 have a sample from the last 12 months; 16 have any sample banked. Listed from the source down, grouped by the next gauge each one's water reaches.

Above Onibury River Onny 25 points, 15 with samples
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
West Onny upstream of White GritRiver West Onny33 km28 Aug 2026 · 41 days agoOxygen 97.6% May 2026Temp 10.5 °C May 2026pH 7.8 May 2026Conductivity 227 µS/cm May 2026
Black Marsh Brook at Priest Weston Roadunnamed stream33 km30 Sep 2026 · 8 days agoOxygen 138.8% Apr 2026Temp 15.2 °C Apr 2026pH 7.7 Apr 2026Conductivity 261 µS/cm Apr 2026
Mid Point of Bog Mine Spoil Tip (BOG2)unnamed stream33 kmLast sampled 10 Sep 2014, before the imported period
Downstream of Bog Mine Spoil Tip (BOG4)unnamed stream33 kmLast sampled 8 Dec 2022, before the imported period
West Onny upstream of White Grit Fish PoolsRiver West Onny33 kmLast sampled 2 Mar 2023, before the imported period
West Onny at Fishing Pools upstream of Old GritRiver West Onny32 kmLast sampled 2 Mar 2023, before the imported period
West Onny upstream of Brookshill BrookRiver West Onny29 km28 Aug 2026 · 41 days agoOxygen 88.5%Temp 15 °CpH 7.7Conductivity 285 µS/cm
Brookshill Brook at confluenceunnamed stream29 km28 Aug 2026 · 41 days agoOxygen 114.6%Temp 15.2 °CpH 8.2Conductivity 279 µS/cm
River Onny at Linley Drive FootbridgeRiver West Onny29 km28 Aug 2026 · 41 days agoOxygen 100.6%Temp 15.5 °CpH 7.9Conductivity 284 µS/cm
River Onny at LinleyRiver West Onny25 km28 Aug 2026 · 41 days agoOxygen 91.5%Temp 15.4 °CpH 7.7Conductivity 268 µS/cm
River Onny East at Whitcot BridgeRiver East Onny23 km9 Mar 2026 · 7 months agoOxygen 93.7%Temp 7.8 °CpH 8.37Ammonia 0.078 mg/l
Tributary of Onny off Roadbridge N of EatonCriftin Brook19 km12 Mar 2025 · 19 months agoOxygen 98.6%Temp 5.1 °CpH 8.22Ammonia below 0.03 mg/l
Eaton Brook at EatonEaton Brook19 kmLast sampled 2 Feb 2017, before the imported period
Quinny Brook tributary at Waterfallunnamed stream17 km18 Dec 2025 · 10 months agoOxygen 100.5%Temp 8.4 °CpH 7.36Ammonia below 0.03 mg/l
Ashes Hollow Brook at Ludlow Road Little Strettonunnamed stream17 kmLast sampled 10 Mar 2011, before the imported period
Callow Hollow Brookunnamed stream16 kmLast sampled 12 Feb 2009, before the imported period
Callow Hollow Brookunnamed stream16 kmLast sampled 12 Feb 2009, before the imported period
River Onny at HorderleyRiver Onny11 km28 Aug 2026 · 41 days agoOxygen 89.4%Temp 15.3 °CpH 8Conductivity 515 µS/cm
Byne Brook at Affcot Mill CottagesByne Brook10.0 km5 Mar 2025 · 19 months agoOxygen 97.5%Temp 5.8 °CpH 7.95Ammonia below 0.03 mg/l
Onny tributary at Cheneyunnamed stream9.3 km27 Aug 2026 · 42 days agoOxygen 77.2%Temp 16.9 °CpH 7.66Ammonia 0.5 mg/l
Quinny Brook at StreffordQuinny Brook9.2 km22 Sep 2026 · 16 days agoOxygen 84% May 2026Temp 17.9 °C May 2026pH 7.9 May 2026Ammonia 0.082 mg/l May 2026
River Onny at Cheyney LongvilleRiver Onny7.8 km14 Aug 2026 · 55 days agoOxygen 52.6%Temp 20.3 °CpH 7.57Ammonia 0.41 mg/l
Quinny Brook at BritpartQuinny Brook7.7 km3 Dec 2024 · 22 months agoOxygen 97.5%Temp 7.3 °CpH 7.71Ammonia 0.043 mg/l
River Onny at Newington BridgeRiver Onny6.4 kmLast sampled 21 Apr 2010, before the imported period
River Onny downstream of Craven ArmsRiver Onny1.7 kmLast sampled 9 Aug 2021, before the imported period
Below Onibury 1 point
Sampling pointWatercourse (map)Below the gaugeLast sampleLatest results (river water)
River Onny - BromfieldRiver Onny5.3 km22 Sep 2026 · 16 days agoOxygen 98.5% Sep 2026Temp 14 °C Sep 2026pH 7.88 Sep 2026Ammonia below 0.03 mg/l Sep 2026

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.

Wave tracker for this river → Shropshire rivers → All UK rivers