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Live levels from 3 monitoring stations across North Yorkshire, York, updated every 15 minutes.
| Station | Level now | Status | ||
|---|---|---|---|---|
| West Lilling | 0.42 m 1h ago | Normal | ||
| 13.7 km by river | ||||
| Huntington | 0.71 m 1h ago | Normal | ||
| 3.8 km by river | ||||
| York Castle Mills Sluices | 7.57 mAOD 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 Foss 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 Foss between Huntington and York Castle Mills Sluices, no more than 1.1 km by river above York Castle Mills Sluices.
| York Wolfe Avenue | 0.06 m 1h ago | Low |
| 1.1 km by river | ||
| York James Street Trashscreen | 5.79 mAOD 1h ago | Normal |
Its water passes York Castle Mills Sluices and every gauge below it on the Foss. It does not pass Huntington or the gauges above it.
Below York Castle Mills Sluices, its water next reaches York Foss Barrier, 190 m 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.
20 storm overflows are traced upstream of York Castle Mills Sluices, the Foss’s lowest gauge on the river map: on the Foss itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of York Castle Mills Sluices: 409 spills over 2,028 hours in total, across the 18 that have a figure. 2 had no usable monitor data that year.
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 Foss includes the smaller streams that join it there.
Within 3 km of one of the Foss’s gauges in a straight line, but the river map cannot say whether their water reaches it.
34 other overflows within 3 km of these gauges are placed below the Foss’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: © Yorkshire 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.
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.
16 sampling points on the River Foss and the streams that join it above York Castle Mills Sluices. 7 have a sample from the last 12 months; 14 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) |
|---|---|---|---|---|
| Foss at Marton Abbey Bridge | River Foss | 10 km | 10 Mar 2025 · 19 months ago | Oxygen 108.1%Temp 7.5 °CpH 8.41Ammonia 0.1 mg/l |
| Farlington Beck tributary at the Rush | unnamed stream | 8.6 km | 11 Aug 2026 · 58 days ago | Oxygen 83.6% Jul 2026Temp 16.7 °C Jul 2026pH 8.11 Jul 2026Ammonia below 0.03 mg/l Jul 2026 |
| Farlington Beck at Farlington | Farlington Beck | 6.1 km | Last sampled 6 Mar 2019, before the imported period | |
| Whitecarr Beck tributary upstream of St John's Well | unnamed stream | 4.8 km | 4 Dec 2024 · 22 months ago | Oxygen 89%Temp 5.9 °CpH 7.59Ammonia 0.035 mg/l |
| Farlington Beck upstream confluence of Foss | Farlington Beck | 4.3 km | Last sampled 2 Mar 2020, before the imported period | |
| Foss at West Lilling | River Foss | 1.7 km | 4 Mar 2024 · 2.6 years ago | Oxygen 100.7%Temp 5.2 °CpH 7.88Ammonia 0.075 mg/l |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| The Sike at Woodlands Farm Cattle Grid | The Sike | 14 km | 21 May 2026 · 5 months ago | Oxygen 67.4%Temp 12.4 °CpH 7.55Ammonia 0.039 mg/l |
| Foss at Lilling Green | River Foss | 14 km | 4 Mar 2024 · 2.6 years ago | Oxygen 99.4%Temp 5.2 °CpH 7.86Ammonia 0.065 mg/l |
| Foss at Stead's Tannery downstream of sewage treatment works | River Foss | 9.7 km | 15 Jul 2026 · 3 months ago | Oxygen 112.3% Mar 2025Temp 8.1 °C Mar 2025pH 7.29Ammonia 0.28 mg/l Mar 2025 |
| Foss at Huntington Church | River Foss | 2.7 km | 1 May 2026 · 5 months ago | Oxygen 95.3%Temp 11.8 °CpH 7.85Ammonia below 0.03 mg/l |
| Foss near Huntington | River Foss | 2.7 km | 11 Dec 2025 · 10 months ago | Oxygen 87.4%Temp 8.1 °CpH 7.8Ammonia 0.063 mg/l |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Tang Hall Beck upstream of Tang Hall Lane | Tang Hall Beck | 0.2 km | 3 Mar 2025 · 19 months ago | Oxygen 98.2%Temp 6.7 °CpH 8.07Ammonia 0.18 mg/l |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Carr Goit at Farfield Farm | Carr Goit | 7.2 km | 8 Sep 2026 · 30 days ago | Oxygen 57%Temp 15.2 °CpH 7.6Ammonia 1.1 mg/l |
| Osbaldwick Beck at Lotherington Mews | Osbaldwick Beck | 2.4 km | 10 Mar 2025 · 19 months ago | Oxygen 110.1%Temp 7.9 °CpH 8.07Ammonia 0.13 mg/l |
| Tang Hall Beck at Foss Islands Footbridge | Tang Hall Beck | 0.1 km | 12 Mar 2025 · 19 months ago | Oxygen 94.8%Temp 6.4 °CpH 8.08Ammonia 0.31 mg/l |
| Sampling point | Watercourse (map) | Above the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Foss at Huntington Hydrometric Site | River Foss | 3.8 km | 12 Feb 2026 · 8 months ago | Oxygen 91.1%Temp 6.6 °CpH 7.56Conductivity 498 µS/cm |
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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