FloodRadar
Log inCreate free account

Explore FloodRadar

Explore the map
Weather
Why ?
Home › Rivers › River Irk

River Irk water levels

Live levels from 1 monitoring station across Greater Manchester, updated every 15 minutes.

1stations
0above typical high

Gauges

Monitoring stations, source to mouth

StationTownLevel nowStatusTrend
Collyhurst WeirstructureManchester0.14 m 27m 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 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.

Where the Irk goes

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.

Streams without a gauge

Named streams on the river map that flow into the Irk and have no gauge of their own. Each has a page with what is known about it: the next gauge downstream, and any storm overflows or water-sampling points placed on it.

Storm overflows upstream

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.

  • 0 report discharging now
  • 44 not discharging
  • 2 offline or silent: 0 monitor offline, 2 status unknown, 0 no live feed

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. Where a stretch or a tributary has more than 4, the 3 discharging now or nearest its gauge are listed, the rest are counted, and every one is in that gauge’s “Upstream of here” list. Show every overflow in every stretch →

Above Collyhurst Weir, the Irk’s highest gauge46 overflows
  • Smedley Road CSO Not discharging
    United Utilities · into River Irk · 890 m by river above Collyhurst Weir · 2025: 12 spills, 11 h
  • Rochdale Rd/Alfred St CSO Status unknown
    United Utilities · into The River Irk · 720 m by river above Collyhurst Weir · 2025: 5 spills, 0.9 h
  • Rochdale Rd/Collyhurst Not discharging
    United Utilities · into The River Irk · 720 m by river above Collyhurst Weir · 2025: 92 spills, 415 h

and 43 more: show all 46 overflows on this stretch → All above Collyhurst Weir, nearest first →

Near these gauges, connection not known

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.

  • Burton St Nr Dalton St CSO 281hx Not discharging
    United Utilities · into River Irk · 60 m from Collyhurst Weir in a straight line · too close to Collyhurst Weir to say which side · 2025: 2 spills, 0.4 h
  • Dantzic Street CSO Not discharging
    United Utilities · into River Irk · 240 m from Collyhurst Weir in a straight line · its water cannot be followed on the map · 2025: 1 spill, 0.9 h
  • Dantzic St Warford St CSO 288a7 Not discharging
    United Utilities · into River Irk · 290 m from Collyhurst Weir in a straight line · its water cannot be followed on the map · 2025: 0 spills, 0 h

48 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.

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.

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.

Above Collyhurst Weir River Irk 20 points, 4 with samples
Sampling pointWatercourse (map)Above the gaugeLast sampleLatest results (river water)
Moston Bk upstream of BroadwayMoston Brook5.2 kmLast sampled 7 Feb 2011, before the imported period
Moston Bk downstream of BroadwayMoston Brook5.2 kmLast sampled 7 Feb 2011, before the imported period
Tributary of Moston Brook adjacent Dalmahoy CLMoston Brook5.2 kmLast sampled 7 Feb 2011, before the imported period
Moston Bk adjacent Lower Memorial ParkMoston Brook5.1 kmLast sampled 7 Feb 2011, before the imported period
Trub Brook, Manchester Golf ClubTrub Brook15 km15 Dec 2025 · 10 months agoOxygen 96.8%Temp 9.1 °CpH 7.52Ammonia 0.36 mg/l
Moston Bk downstream of Hardman Fold TipMoston Brook4.6 kmLast sampled 11 Dec 2007, before the imported period
River Irk above Royton EtwRiver Irk15 kmLast sampled 10 Mar 2020, before the imported period
Moston Brook at Williams RoadMoston Brook4.1 km24 Jun 2026 · 3 months agoOxygen 50.7%Temp 16.7 °CpH 7.43Ammonia 0.69 mg/l
Irk at Street Bridge below Royton EtwRiver Irk15 kmLast sampled 10 Feb 2014, before the imported period
Trub Brook above the confluence with Whit BrookTrub Brook13 kmLast sampled 31 May 2012, before the imported period
Whit Brook above the confluence with Trub BrookWhit Brook13 kmLast sampled 1 Dec 2006, before the imported period
River Irk at Hendham ValeRiver Irk1.7 kmLast sampled 28 Nov 2018, before the imported period
Moston Brook upstream of Queens RoadMoston Brook1.7 kmLast sampled 6 Apr 2000, before the imported period
Moston Brook at Silchester DriveMoston Brook1.6 kmLast sampled 10 Feb 2014, before the imported period
Whit Brook above Chadwick and SmithWhit Brook12 kmLast sampled 19 Jul 2004, before the imported period
Whit Brook above the confluence with River Irk at the Old Grammar SchoolWhit Brook12 km26 Aug 2026 · 43 days agoOxygen 94.7%Temp 15.8 °CpH 7.62Ammonia 0.25 mg/l
River Irk upstream of Moston BrookRiver Irk0.6 kmLast sampled 10 Feb 2014, before the imported period
Irk at Hanson Bridge above the confluence with Whit BrookRiver Irk11 km26 Aug 2026 · 43 days agoOxygen 94.6%Temp 14.8 °CpH 7.7Ammonia 0.074 mg/l
River Irk above Townley Street Bridge above the confluence with Wince BrookRiver Irk11 kmLast sampled 10 Feb 2014, before the imported period
River Irk downstream of Moston BrookRiver Irk0.1 kmLast sampled 10 Feb 2014, before the imported period
Below Collyhurst Weir 1 point
Sampling pointWatercourse (map)Below the gaugeLast sampleLatest results (river water)
River Irk at Red Bank above Scotland WeirRiver Irk1.0 km29 Sep 2026 · 9 days agoOxygen 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.

Wave tracker for this river → Greater Manchester rivers → All UK rivers