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Home › Rivers › River Coln

River Coln water levels

Live levels from 3 monitoring stations across Gloucestershire, updated every 15 minutes.

3stations
0above typical high

Gauges

Monitoring stations, source to mouth

StationTownLevel nowStatusTrend
Fosse BridgeFossebridge0.03 mASD 53m agoNormal—
downstream, distance by river not measured
BiburyBibury0.06 mASD 23m agoLow—
9.3 km by river
FairfordFairford0.42 mASD 23m 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 Coln 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 Coln above Fairford on the river map. Streams without a gauge are not counted here.

Where the Coln goes

Below Fairford, its water next reaches St Johns Lock, a gauge on River Thames, 10.8 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

None of the storm overflows FloodRadar holds is traced upstream of Fairford on the river map. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow.

1 other overflow within 3 km of these gauges is placed below the Coln’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 →

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.

8 sampling points on the River Coln and the streams that join it above Fairford, and below it. 5 have a sample from the last 12 months; 6 have any sample banked. Listed from the source down, grouped by the next gauge each one's water reaches.

Above Bibury River Coln 1 point
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Coln at Court Farm Bridge, BiburyRiver Coln0.8 km20 May 2026 · 5 months agoOxygen 98.4%Temp 11.9 °CpH 7.89Ammonia 0.062 mg/l
Above Fairford River Coln 1 point, 0 with samples
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Coln at Gauging Station, BiburyRiver Coln9.4 kmLast sampled 17 Mar 2017, before the imported period
Above Fosse Bridge River Coln 2 points
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Upstream of Willowside Farm Track, WithingtonRiver Coln11 km13 Dec 2024 · 22 months agoOxygen 95%Temp 8.3 °CpH 8.13Ammonia below 0.03 mg/l
Coln at WithingtonRiver Coln11 km30 Sep 2026 · 8 days agoOxygen 86.1%Temp 15.8 °CpH 8.17Ammonia below 0.03 mg/l
Below Fairford 4 points, 3 with samples
Sampling pointWatercourse (map)Below the gaugeLast sampleLatest results (river water)
1 km downstream of FairfordRiver Coln1.4 km26 Aug 2026 · 43 days agoOxygen 113.8%Temp 15.9 °CpH 8.18Ammonia 0.019 mg/l
Coln at Roadbridge, WhelfordRiver Coln3.8 kmLast sampled 12 Sep 2006, before the imported period
River Coln above sewage treatment worksRiver Coln6.0 km21 Sep 2026 · 17 days agoOxygen 96%Temp 12.9 °CpH 8.38Ammonia below 0.03 mg/l
Coln at Roundhouse, LechladeRiver Coln8.5 km22 Jul 2026 · 3 months agoOxygen 108.7%Temp 17.8 °CpH 8.28Ammonia 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.

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