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Leven (Loch Lomond) water levels

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

1stations
0above typical high

Gauges

Monitoring stations, source to mouth

StationTownLevel nowStatusTrend
Linnbrane—1.36 m 21m 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 Leven (Loch Lomond) 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.

4 gauged tributaries, 6 gauges

Aber Burn

Joins the Leven (Loch Lomond) above Linnbrane, its highest gauge, no more than 16.9 km by river above Linnbrane.

Lagganbeg0.46 m 36m agoNormal

Its water passes every gauge on the Leven (Loch Lomond), from Linnbrane down.

Endrick Water

Joins the Leven (Loch Lomond) above Linnbrane, its highest gauge, no more than 25.7 km by river above Linnbrane.

Graystone Bridge0.34 m 21m agoNormal
Gaidrew0.51 m 21m agoNormal

Its water passes every gauge on the Leven (Loch Lomond), from Linnbrane down.

Gauged streams joining Endrick Water

Falloch

Joins the Leven (Loch Lomond) above Linnbrane, its highest gauge, no more than 48.9 km by river above Linnbrane.

Glenfalloch0.76 m 21m agoNormal

Its water passes every gauge on the Leven (Loch Lomond), from Linnbrane down.

Luss Water

Joins the Leven (Loch Lomond) above Linnbrane, its highest gauge, no more than 16.4 km by river above Linnbrane.

Luss0.53 m 21m agoNormal

Its water passes every gauge on the Leven (Loch Lomond), from Linnbrane down.

Where the Leven (Loch Lomond) goes

No gauge below Linnbrane is known on the river map.

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

17 storm overflows are traced upstream of Linnbrane, the Leven (Loch Lomond)’s lowest gauge on the river map: on the Leven (Loch Lomond) itself, on its gauged tributaries, and on smaller streams that join above there.

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

Official figures for 2025, for the overflows traced upstream of Linnbrane: 660 overflow events over 4,658 hours in total, across the 12 that have a figure. 2 had no data that year; 3 have no 2025 figure. Scottish Water counts overflow events, not the 12/24-hour spills counted in England and Wales, so this total cannot be set beside theirs.

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 Leven (Loch Lomond) includes the smaller streams that join it there.

Above Linnbrane, the Leven (Loch Lomond)’s highest gauge9 overflows
Aber Burn, above Lagganbegjoins the Leven (Loch Lomond) above Linnbrane2 overflows
  • Gartocharn WwTW CSO Not discharging
    Scottish Water · into Blairennich Burn · 1.2 km by river above Lagganbeg · no official annual figure
  • Gartocharn WwTW EO 1 Not discharging
    Scottish Water · into Blairennich Burn · 1.0 km by river above Lagganbeg · no official annual figure
Endrick Water, above Graystone Bridgejoins the Leven (Loch Lomond) above Linnbrane1 overflow
  • Fintry WwTW - Post Psts Ssso Monitor offline
    Scottish Water · into Endrick Water · 4.7 km by river above Graystone Bridge · 2025: 363 overflow events, 3,037 h
Endrick Water, above Gaidrewjoins the Leven (Loch Lomond) above Linnbrane2 overflows
  • Killearn WwTW CSO Not discharging
    Scottish Water · into Blane Water · 5.9 km by river above Gaidrew · 2025: no data
  • Killearn WwTW Ssso And EO Not discharging
    Scottish Water · into Blane Water · 5.9 km by river above Gaidrew · 2025: 12 overflow events, 72 h
Blane Water, above Quinloch Bridgejoins Endrick Water3 overflows
  • Strathblane WwTW CSO Not discharging
    Scottish Water · into Blane Water · 3.5 km by river above Quinloch Bridge · 2025: 111 overflow events, 775 h
  • Strathblane WwTW - (New) Ssso Not discharging
    Scottish Water · into Blane Water · 3.5 km by river above Quinloch Bridge · 2025: 4 overflow events, 67 h
  • Strathblane WwTW - (Old) Ssso Not discharging
    Scottish Water · into Blane Water · 3.5 km by river above Quinloch Bridge · no official annual figure

Near these gauges, connection not known

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

  • O/S No13 Susannah Street CSO Not discharging
    Scottish Water · into River Leven · 100 m from Linnbrane in a straight line · too close to Linnbrane to say which side · no official annual figure
  • Balloch South Lodge G.c. SPS EO Ns370822 Monitor offline
    Scottish Water · into Loch Lomond · 2.5 km from Linnbrane in a straight line · discharges to a loch, lake or reservoir · 2025: 127 overflow events, 250 h
  • Alexandria Dalquhurn Point CSO Ns393777 Monitor offline
    Scottish Water · into River Leven · 2.5 km from Linnbrane in a straight line · discharges into a tidal reach, where the water moves both ways · no official annual figure
  • Alexandria, No1 CSO (Pilan Flats) Not discharging
    Scottish Water · into River Leven · 2.9 km from Linnbrane in a straight line · discharges into a tidal reach, where the water moves both ways · 2025: 18 overflow events, 36 h
  • Cameron House Boathouse SPS EO Ns378828 Not discharging
    Scottish Water · into Loch Lomond · 2.9 km from Linnbrane in a straight line · discharges to a loch, lake or reservoir · 2025: 0 overflow events, 0 h

5 other overflows within 3 km of these gauges are placed below the Leven (Loch Lomond)’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: © Scottish Water, near-real-time Overflow Map data, open licence for reuse. EDM monitors indicate overflows; they do not confirm them, and this is not advice on water quality. Annual figures for Scotland: Scottish Water overflow event data, Open Government Licence.