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Home › Rivers › River Lynher

River Lynher water levels

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

1stations
0above typical high

Gauges

Monitoring stations, source to mouth

StationTownLevel nowStatusTrend
PillatonPillaton0.19 m 31m agoLow—

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 Lynher 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.

1 gauged tributary, 1 gauge

Withey Brook name from the river map

Joins the Lynher above Pillaton, its highest gauge, no more than 24.6 km by river above Pillaton.

Bastreet0.10 mASD 31m agoLow

Its water passes every gauge on the Lynher, from Pillaton down.

Where the Lynher goes

Below Pillaton, its water next reaches Plymouth, a gauge on River Tamar, 19.1 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.

Storm overflows upstream

5 storm overflows are traced upstream of Pillaton, the Lynher’s lowest gauge on the river map: on the Lynher itself, on its gauged tributaries, and on smaller streams that join above there.

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

Official figures for 2025, for the overflows traced upstream of Pillaton: 216 spills over 2,798 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 the Lynher includes the smaller streams that join it there.

Above Pillaton, the Lynher’s highest gauge5 overflows
  • North Hill WwTW Not discharging
    South West Water · into River Lynher · 21.0 km by river above Pillaton · 2025: 19 spills, 99 h
  • Upton Cross Combined Sewer Overflow Not discharging
    South West Water · into Trib Of River Lyner · 17.0 km by river above Pillaton · 2025: 0 spills, 0 h · placed on the river by its position alone
  • Rilla Mill WwTW Not discharging
    South West Water · into (S) River Lynher · 16.3 km by river above Pillaton · 2025: 38 spills, 464 h
  • Golberdon STW Not discharging
    South West Water · into River Lynher · 11.9 km by river above Pillaton · 2025: 126 spills, 1,782 h
  • Pillaton Wastewater Treatmemt Works Not discharging
    South West Water · into River Lynher · 1.8 km by river above Pillaton · 2025: 33 spills, 453 h

Near these gauges, connection not known

Within 3 km of one of the Lynher’s gauges in a straight line, but the river map cannot say whether their water reaches it.

  • Landrake Wastewater Treatment Works Not discharging
    South West Water · into Landrake Stream · 1.9 km from Pillaton in a straight line · its watercourse is not on the river map · 2025: 91 spills, 1,756 h
  • Landrake Pumping Station Not discharging
    South West Water · into Tributary Of The River Lyner · 2.1 km from Pillaton in a straight line · its watercourse is not on the river map · 2025: 3 spills, 6.1 h
  • Blunts STW Not discharging
    South West Water · into Blunts Stream (S)(Lyhner Trib) · 2.4 km from Pillaton in a straight line · its watercourse is not on the river map · 2025: 11 spills, 3.2 h

1 other overflow within 3 km of these gauges is placed below the Lynher’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: © South West 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.

29 sampling points on the River Lynher and the streams that join it above Pillaton, and below it. 14 have a sample from the last 12 months; 19 have any sample banked. Listed from the source down, grouped by the next gauge each one's water reaches.

Above Bastreet Withy Brook 2 points, 0 with samples
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Rushyford Water at Treworthaunnamed stream1.6 kmLast sampled 21 Nov 2022, before the imported period
Withey Brook upstream of Bastreet water treatment worksWithey Brook0.1 kmLast sampled 22 Mar 2018, before the imported period
Above Pillaton River Lynher 26 points, 18 with samples
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
River Lynher at Hendraunnamed stream31 km10 Jul 2026 · 3 months agoOxygen 89.9%Temp 14.4 °CpH 5.9Ammonia 0.026 mg/l
River Lynher upstream of Trewint StreamRiver Lynher30 kmLast sampled 13 Nov 2000, before the imported period
River Lynher at Tregirls BridgeRiver Lynher30 kmLast sampled 6 Dec 2013, before the imported period
Withey Brook at Rhine Arrish CoppiceWithey Brook24 km18 Dec 2024 · 22 months agoOxygen 100%Temp 10.2 °CpH 5.77Ammonia 0.0092 mg/l
River Lynher at Trebartha Road BridgeRiver Lynher23 km7 Sep 2026 · 31 days agoOxygen 93.7%Temp 16.2 °CpH 7.2Ammonia below 0.03 mg/l
Withey Brook upstream of River LynherWithey Brook23 km7 Sep 2026 · 31 days agoOxygen 100.2%Temp 16.2 °CpH 7.13Ammonia below 0.03 mg/l
River Lynher at BerriowbridgeRiver Lynher20 kmLast sampled 1 Mar 2011, before the imported period
Darleyford Stream upstream of Phoenix Mine Aditunnamed stream20 km24 Aug 2026 · 45 days agoOxygen 96.4% Dec 2025Temp 11.1 °C Dec 2025pH 5.43 Dec 2025Conductivity 72 µS/cm Dec 2025
Darleyford Stream downstream of Phoenix Mine Aditunnamed stream20 km24 Aug 2026 · 45 days agoOxygen 100.7%Temp 13.6 °CpH 6.7Conductivity 72 µS/cm
River Lynher upstream of Middlewood sewage treatment worksRiver Lynher20 kmLast sampled 20 Aug 2001, before the imported period
Darleyford Stream at Darleyfordunnamed stream19 km24 Aug 2026 · 45 days agoOxygen 101%Temp 13.4 °CpH 7.3Conductivity 81 µS/cm
Darleyford Stream at Lower Lakeunnamed stream17 km24 Aug 2026 · 45 days agoOxygen 101%Temp 13.3 °CpH 5.7Conductivity 103 µS/cm
Lynher at StarabridgeRiver Lynher17 kmLast sampled 4 Oct 2016, before the imported period
River Lynher at Rilla Mill BridgeRiver Lynher16 km17 Sep 2026 · 21 days agoOxygen 99.4%Temp 14.5 °CpH 7.3Conductivity 112 µS/cm
River Lynher at PlushabridgeRiver Lynher15 km17 Sep 2026 · 21 days agoOxygen 98%Temp 14.5 °CpH 7.2Conductivity 114 µS/cm
Pengelly Stream at Beneathwoodunnamed stream15 km12 Aug 2026 · 57 days agoOxygen 97.7%Temp 16.2 °CpH 7.34Ammonia 0.011 mg/l
Tokenbury Stream at Dwellamill Woodunnamed stream14 kmLast sampled 24 May 2017, before the imported period
Penharget Stream at Mill Lawn Fordunnamed stream13 kmLast sampled 24 May 2017, before the imported period
Appledore Stream at Overlandunnamed stream12 km26 Mar 2025 · 18 months agoOxygen 98%Temp 12.5 °CpH 7.59Ammonia 0.11 mg/l
River Lynher upstream of Golberdon sewage treatment worksRiver Lynher12 km22 May 2025 · 17 months agoOxygen 102.9% Apr 2025Temp 9.9 °C Apr 2025pH 7.5Conductivity 115 µS/cm Apr 2025
Lynher downstream of Tokenbury StreamRiver Lynher12 km17 Sep 2026 · 21 days agoOxygen 96.6%Temp 14.5 °CpH 7.4Conductivity 125 µS/cm
River Lynher at Bicton Mill BridgeRiver Lynher11 km27 Mar 2024 · 2.5 years agoOxygen 100.5% Mar 2024Temp 8.4 °C Mar 2024pH 7.14Ammonia below 0.03 mg/l Mar 2024
Redmoor Stream Prior to Haye StreamKelly Bray Stream11 kmLast sampled 29 Mar 2017, before the imported period
River Lynher at NewbridgeRiver Lynher6.9 km17 Sep 2026 · 21 days agoOxygen 96.5%Temp 14.6 °CpH 7.4Conductivity 160 µS/cm
River Lynher at Clapper BridgeRiver Lynher3.4 km18 Mar 2024 · 2.6 years agopH 7.32
River Lynher at Pillaton BridgeRiver Lynher0.8 km17 Sep 2026 · 21 days agoOxygen 96.2%Temp 14.5 °CpH 7.5Conductivity 171 µS/cm
Below Pillaton 1 point
Sampling pointWatercourse (map)Below the gaugeLast sampleLatest results (river water)
River Lynher at Notter MillRiver Lynher2.0 km19 Aug 2026 · 50 days agoOxygen 96.3%Temp 18 °CpH 7.53Ammonia below 0.002 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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