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.
Streams and rivers with a gauge whose water joins the Idle above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
Named streams on the river map that flow into the Idle 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.
49 storm overflows are traced upstream of Mattersey, the Idle’s lowest gauge on the river map: on the Idle itself, on its gauged tributaries, and on smaller streams that join above there.
0 report discharging now
47 not discharging
2 offline or silent: 0 monitor offline, 1 status unknown, 1 no live feed
Official figures for 2025, for the overflows traced upstream of Mattersey: 721 spills over 2,611 hours in total, across the 48 that have a figure. 1 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 Idle includes the smaller streams that join it there. Every overflow traced is listed here, each stretch in full. Back to the short lists →
Above Ordsall, the Idle’s highest gauge1 overflow
London Road CSONot discharging Severn Trent Water · into Trib Of River Idle · 760 m by river above Ordsall · 2025: 6 spills, 1.0 h
River Maun, above Field Milljoins the Idle above Ordsall10 overflows
Sheepwash Lane CSONot discharging Severn Trent Water · into River Maun · 3.9 km by river above Field Mill · 2025: 3 spills, 0.7 h
Kirkby Folly Road Roundhill CSONot discharging Severn Trent Water · into Tributary Of River Maun · 3.6 km by river above Field Mill · 2025: 3 spills, 0.6 h
Kirkby Folly Road Roundhill CSONot discharging Severn Trent Water · into Tributary Of River Maun · 3.6 km by river above Field Mill · 2025: 0 spills, 0 h
Kirkby Folly Road Roundhill CSONot discharging Severn Trent Water · into Tributary Of River Maun · 3.6 km by river above Field Mill · 2025: 6 spills, 1.2 h
Coxmoor Road Sewage Pumping StationNot discharging Severn Trent Water · into River Maun · 3.2 km by river above Field Mill · 2025: 20 spills, 64 h
Coxmoor Road CSONot discharging Severn Trent Water · into River Maun · 3.2 km by river above Field Mill · 2025: 0 spills, 0 h
Mansfield - 10 Randol Close CSONot discharging Severn Trent Water · into River Maun · 2.0 km by river above Field Mill · 2025: 16 spills, 24 h
Sutton-In-Ashfield STWNot discharging Severn Trent Water · into River Maun\kingsmill Reservoir · 2.0 km by river above Field Mill · 2025: 2 spills, 7.7 h
Mansfield - Sheepbridge Lane 2 CSONot discharging Severn Trent Water · into River Maun · 850 m by river above Field Mill · 2025: 1 spill, 0.1 h
Mansfield - Sheepbridge Lane 2 CSONot discharging Severn Trent Water · into River Maun · 850 m by river above Field Mill · 2025: 17 spills, 2.4 h
River Maun, above Mansfield The Dykesjoins the Idle above Ordsall3 overflows
Sewage Pumping StationNot discharging Severn Trent Water · into River Maun · 2.6 km by river above Mansfield The Dykes · 2025: 24 spills, 81 h
Mansfield - Bath Lane STWNot discharging Severn Trent Water · into River Maun · 2.5 km by river above Mansfield The Dykes · 2025: 31 spills, 157 h
Mansf Woodhouse - Old Mill Ln (CSO)Not discharging Severn Trent Water · into River Maun · 1.6 km by river above Mansfield The Dykes · 2025: 32 spills, 39 h
River Maun, above Whitewater Bridgejoins the Idle above Ordsall7 overflows
Rainworth Sewage Treatment WorksNot discharging Severn Trent Water · into Rainworth Water · 16.5 km by river above Whitewater Bridge · 2025: 21 spills, 101 h
Rainworth Sewage Treatment WorksNot discharging Severn Trent Water · into Rainworth Water · 16.5 km by river above Whitewater Bridge · 2025: 19 spills, 37 h
Maun Valley Sewage Pumping StationNot discharging Severn Trent Water · into River Maun · 14.5 km by river above Whitewater Bridge · 2025: 7 spills, 8.0 h
Bilsthorpe Sewage Treatment WorksNot discharging Severn Trent Water · into Rainworth Water · 10.3 km by river above Whitewater Bridge · 2025: 15 spills, 79 h
Edwinstowe CSONot discharging Severn Trent Water · into River Maun · 6.6 km by river above Whitewater Bridge · 2025: 33 spills, 46 h
Edwinstowe - Boy Lane (CSO)Not discharging Severn Trent Water · into River Maun & Vicar Water · 4.9 km by river above Whitewater Bridge · 2025: 16 spills, 28 h
Edwinstowe STWNot discharging Severn Trent Water · into River Maun · 4.9 km by river above Whitewater Bridge · 2025: 46 spills, 227 h
River Meden, above Mansfield Pleasleyjoins the Idle above Ordsall6 overflows
Meden Bank Combined Sewer OverflowNot discharging Severn Trent Water · into River Meden · 5.2 km by river above Mansfield Pleasley · 2025: 2 spills, 1.7 h
Meden Bank Combined Sewer OverflowStatus unknown Severn Trent Water · into River Meden · 5.2 km by river above Mansfield Pleasley · 2025: 2 spills, 6.1 h
Skegby - Mansfield Road SSONot discharging Severn Trent Water · into Tributary Of River Meden · 4.7 km by river above Mansfield Pleasley · 2025: 6 spills, 1.0 h
Skegby Sewage Treatment WorksNot discharging Severn Trent Water · into Skegby Brook · 4.3 km by river above Mansfield Pleasley · 2025: 38 spills, 114 h · placed on the river by its position alone
Skegby Sewage Treatment WorksNot discharging Severn Trent Water · into Skegby Brook · 4.3 km by river above Mansfield Pleasley · 2025: 37 spills, 253 h · placed on the river by its position alone
Wilkinsons Close CSONot discharging Severn Trent Water · into River Meden · 470 m by river above Mansfield Pleasley · 2025: 0 spills, 0 h
River Meden, above Church Warsopjoins the Idle above Ordsall4 overflows
Pleasley - Jenkins Street SPSNot discharging Severn Trent Water · into River Meden · 7.9 km by river above Church Warsop · 2025: 7 spills, 5.9 h
Oxclose Lane SPSNot discharging Severn Trent Water · into River Meden · 6.4 km by river above Church Warsop · 2025: 4 spills, 1.2 h
Shirebrook Sewage Treatment WorksNot discharging Severn Trent Water · into Shire Brook · 3.5 km by river above Church Warsop · 2025: 13 spills, 74 h · placed on the river by its position alone
Shirebrook Sewage Treatment WorksNot discharging Severn Trent Water · into Shire Brook · 3.5 km by river above Church Warsop · 2025: 8 spills, 9.2 h · placed on the river by its position alone
River Meden, above Perlethorpejoins the Idle above Ordsall8 overflows
Market Warsop - The Hawthorns (CSO)Not discharging Severn Trent Water · into River Meden · 11.9 km by river above Perlethorpe · 2025: 0 spills, 0 h
Warsop - Stonebridge Lane (SSO)Not discharging Severn Trent Water · into River Meden · 11.9 km by river above Perlethorpe · 2025: 0 spills, 0 h
Market Warsop - Stonebridge Ln (CSO)Not discharging Severn Trent Water · into River Meden · 11.9 km by river above Perlethorpe · 2025: 0 spills, 0 h
Church Rd/Eastlands Lane Jcn CSONot discharging Severn Trent Water · into Trib Of The River Meden · 10.5 km by river above Perlethorpe · 2025: 4 spills, 41 h
Warsop - Burns Lane CSONot discharging Severn Trent Water · into River Meden · 10.2 km by river above Perlethorpe · 2025: 6 spills, 29 h
Manor Road Combined Sewer OverflowNot discharging Severn Trent Water · into River Meden · 9.9 km by river above Perlethorpe · 2025: 1 spill, 1.2 h
Netherfield Ln Storm Sewage OverflwNot discharging Severn Trent Water · into River Meden · 8.2 km by river above Perlethorpe · 2025: 37 spills, 50 h
River Poulter, above Twyford Bridgejoins the Idle above Ordsall6 overflows
Creswell Sewage Pumping StationNot discharging Severn Trent Water · into Millwood Brook - Creswell Arm · 22.7 km by river above Twyford Bridge · 2025: 35 spills, 127 h · placed on the river by its position alone
Creswell Sewage Treatment WorksNot discharging Severn Trent Water · into A Tributary Of Millwood Brook · 22.7 km by river above Twyford Bridge · 2025: 59 spills, 286 h
Langwith CSONot discharging Severn Trent Water · into River Poulter · 20.7 km by river above Twyford Bridge · 2025: 39 spills, 82 h
Nether Langwith STWNot discharging Severn Trent Water · into River Poulter · 19.7 km by river above Twyford Bridge · 2025: 15 spills, 111 h
Norton STWNot discharging Severn Trent Water · into River Poulter · 16.2 km by river above Twyford Bridge · 2025: 43 spills, 223 h
Between Ordsall and Mattersey4 overflows
Kings Park (CSO)Not discharging Severn Trent Water · into River Idle/Maun/Carr Dyke · 16.5 km by river above Mattersey · 2025: 3 spills, 26 h
Retford - Kings Park CSONot discharging Severn Trent Water · into Carr Dyke · 15.6 km by river above Mattersey · 2025: 10 spills, 90 h
Retford Sewage Treatment WorksNot discharging Severn Trent Water · into River Idle · 12.8 km by river above Mattersey · 2025: 21 spills, 172 h
Church House Pumping StationNot discharging Severn Trent Water · into River Idle · 130 m by river above Mattersey · 2025: 1 spill, 1.3 h
Near these gauges, connection not known
Within 3 km of one of the Idle’s gauges in a straight line, but the river map cannot say whether their water reaches it.
Bracken Lane East Retford CSONot discharging Severn Trent Water · into Retford Beck · 1.2 km from Ordsall in a straight line · no mapped watercourse close enough to be sure · 2025: 0 spills, 0 h
Ranskill Sewage Treatment WorksNot discharging Severn Trent Water · into Tributary Of Ranskill Brook · 2.8 km from Mattersey in a straight line · no mapped watercourse close enough to be sure · 2025: 3 spills, 8.6 h
Grove Sewage Treatment WorksNot discharging Severn Trent Water · into Tributary Of North Beck · 2.9 km from Ordsall in a straight line · its watercourse is not on the river map · 2025: 26 spills, 78 h
1 other overflow within 3 km of these gauges is placed below the Idle’s lowest gauge or on another river, so not listed.
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.
68 sampling points on the River Idle and the streams that join it above Mattersey, and below it. 29 have a sample from the last 12 months; 33 have any sample banked.
Sampled most recently, anywhere on the Idle and its streams:
Meden at LittlewoodRiver Meden · 4.5 km above Church WarsopLast sampled 1 Oct 2026 · 7 days agoOxygen 98.5%Temp 14 °CpH 8.37Ammonia below 0.03 mg/l
England's samples only. Each count opens the list of those points, nearest first, with the date of each one’s latest sample (the gauge’s “Upstream of here” list).
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.