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Live levels from 1 monitoring station across Greater Manchester, updated every 15 minutes.
| Station | Level now | Status |
|---|---|---|
| Collyhurst Weirstructure | 0.14 m 22m 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 Irk above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
No gauged tributary joins the Irk above Collyhurst Weir on the river map. Streams without a gauge are not counted here.
No gauge below Collyhurst Weir 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.
46 storm overflows are traced upstream of Collyhurst Weir, the Irk’s lowest gauge on the river map: on the Irk itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Collyhurst Weir: 784 spills over 2,035 hours in total, across all 46.
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 Irk includes the smaller streams that join it there. Every overflow traced is listed here, each stretch in full. Back to the short lists →
Within 3 km of one of the Irk’s gauges in a straight line, but the river map cannot say whether their water reaches it.
36 more near these gauges whose connection is not known.
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: © United Utilities 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.
21 sampling points on the River Irk and the streams that join it above Collyhurst Weir, and below it. 5 have a sample from the last 12 months; 5 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) |
|---|---|---|---|---|
| Moston Bk upstream of Broadway | Moston Brook | 5.2 km | Last sampled 7 Feb 2011, before the imported period | |
| Moston Bk downstream of Broadway | Moston Brook | 5.2 km | Last sampled 7 Feb 2011, before the imported period | |
| Tributary of Moston Brook adjacent Dalmahoy CL | Moston Brook | 5.2 km | Last sampled 7 Feb 2011, before the imported period | |
| Moston Bk adjacent Lower Memorial Park | Moston Brook | 5.1 km | Last sampled 7 Feb 2011, before the imported period | |
| Trub Brook, Manchester Golf Club | Trub Brook | 15 km | 15 Dec 2025 · 10 months ago | Oxygen 96.8%Temp 9.1 °CpH 7.52Ammonia 0.36 mg/l |
| Moston Bk downstream of Hardman Fold Tip | Moston Brook | 4.6 km | Last sampled 11 Dec 2007, before the imported period | |
| River Irk above Royton Etw | River Irk | 15 km | Last sampled 10 Mar 2020, before the imported period | |
| Moston Brook at Williams Road | Moston Brook | 4.1 km | 24 Jun 2026 · 3 months ago | Oxygen 50.7%Temp 16.7 °CpH 7.43Ammonia 0.69 mg/l |
| Irk at Street Bridge below Royton Etw | River Irk | 15 km | Last sampled 10 Feb 2014, before the imported period | |
| Trub Brook above the confluence with Whit Brook | Trub Brook | 13 km | Last sampled 31 May 2012, before the imported period | |
| Whit Brook above the confluence with Trub Brook | Whit Brook | 13 km | Last sampled 1 Dec 2006, before the imported period | |
| River Irk at Hendham Vale | River Irk | 1.7 km | Last sampled 28 Nov 2018, before the imported period | |
| Moston Brook upstream of Queens Road | Moston Brook | 1.7 km | Last sampled 6 Apr 2000, before the imported period | |
| Moston Brook at Silchester Drive | Moston Brook | 1.6 km | Last sampled 10 Feb 2014, before the imported period | |
| Whit Brook above Chadwick and Smith | Whit Brook | 12 km | Last sampled 19 Jul 2004, before the imported period | |
| Whit Brook above the confluence with River Irk at the Old Grammar School | Whit Brook | 12 km | 26 Aug 2026 · 43 days ago | Oxygen 94.7%Temp 15.8 °CpH 7.62Ammonia 0.25 mg/l |
| River Irk upstream of Moston Brook | River Irk | 0.6 km | Last sampled 10 Feb 2014, before the imported period | |
| Irk at Hanson Bridge above the confluence with Whit Brook | River Irk | 11 km | 26 Aug 2026 · 43 days ago | Oxygen 94.6%Temp 14.8 °CpH 7.7Ammonia 0.074 mg/l |
| River Irk above Townley Street Bridge above the confluence with Wince Brook | River Irk | 11 km | Last sampled 10 Feb 2014, before the imported period | |
| River Irk downstream of Moston Brook | River Irk | 0.1 km | Last sampled 10 Feb 2014, before the imported period |
| Sampling point | Watercourse (map) | Below the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| River Irk at Red Bank above Scotland Weir | River Irk | 1.0 km | 29 Sep 2026 · 9 days ago | Oxygen 104.5%Temp 14.6 °CpH 7.93Ammonia 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.
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