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Live levels from 10 monitoring stations across Greater London, updated every 15 minutes.
| Station | Level now | Status | ||
|---|---|---|---|---|
| Woodhall Avenue | 0.21 mASD 1h ago | Low | ||
| 140 m by river | ||||
| Waxwell Lane | 0.19 mASD 11h ago | Normal | ||
| downstream, distance by river not measured | ||||
| Pinner, Moss Close | 0.14 mASD 1h ago | Low | ||
| 460 m by river | ||||
| Pinner, Avenue Road | 0.16 mASD 1h ago | Normal | ||
| 960 m by river | ||||
| Pinner, Eastcote Road | 0.36 mASD 1h ago | Normal | ||
| 4.0 km by river | ||||
| Ruislip | 0.16 mASD 1h ago | Normal | ||
| 3.4 km by river | ||||
| Ickenham, Swakeleys Road | 0.58 mASD 1h ago | Normal | ||
| 2.5 km by river | ||||
| Uxbridge, Hercies Road | 0.76 mASD 1h ago | Normal | ||
| 1.8 km by river | ||||
| Uxbridge | 0.10 mASD 1h ago | Normal | ||
| 2.1 km by river | ||||
| Uxbridge, Philpots Bridge | 0.90 mASD 1h 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 the Pinn 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.
Joins the Pinn between Ruislip and Ickenham, Swakeleys Road, no more than 3.2 km by river above Ickenham, Swakeleys Road.
| Howletts Lane, Ruislip | 0.12 mASD 15h ago | old reading |
Its water passes Ickenham, Swakeleys Road and every gauge below it on the Pinn. It does not pass Ruislip or the gauges above it.
Below Uxbridge, Philpots Bridge, its water next reaches Yiewsley, a gauge on Fray's River, 1.2 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.
None of the storm overflows FloodRadar holds is traced upstream of Uxbridge, Philpots Bridge 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.
3 other overflows within 3 km of these gauges are placed below the Pinn’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 →
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.
1 sampling point on the River Pinn and the streams that join it above Uxbridge, Philpots Bridge. 0 have a sample from the last 12 months; 0 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) |
|---|---|---|---|---|
| Pinn above Cannon Brook | River Pinn | 2.2 km | No sample published 1 Oct 2023 – 7 Oct 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.
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