The Porter River
Joins the Don between Oxspring Bower Hill and Wharncliffe Side, no more than 7.7 km by river above Wharncliffe Side. Nearest the Don: Stocksbridge Steelworks Normal.
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Live levels from 13 monitoring stations across South Yorkshire, updated every 15 minutes.
| Station | Level now | Status | ||
|---|---|---|---|---|
| Penistone | 0.31 m 1h ago | Low | ||
| 5.1 km by river | ||||
| Oxspring Bower Hill | 0.01 m 1h ago | Normal | ||
| 13.0 km by river | ||||
| Wharncliffe Side | 0.84 m 1h ago | Low | ||
| 10.8 km by river | ||||
| Sheffield Lady's Bridge | 0.39 m 1h ago | Normal | ||
| 5.8 km by river | ||||
| Hadfields | 0.33 m 1h ago | Low | ||
| 5.1 km by river | ||||
| Rotherham | 0.03 m 1h ago | Low | ||
| 700 m by river | ||||
| Rotherham Forge Island | 0.21 m 1h ago | Low | ||
| 8.4 km by river | ||||
| Kilnhurst Lowerstructure | 0.54 m 1h ago | Low | ||
| 6.1 km by river | ||||
| Mexborough Lockstructure | 0.63 m 1h ago | Low | ||
| 5.4 km by river | ||||
| Sprotbrough | 0.50 m 1h ago | Normal | ||
| 5.6 km by river | ||||
| Doncaster | 0.29 m 1h ago | Normal | ||
| 11.3 km by river | ||||
| Kirk Bramwithtidal | 2.07 mAOD 1h ago | Normal | ||
| 5.4 km by river | ||||
| Fishlaketidal | 1.69 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 Don above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
Each tributary’s water passes the gauge it joins above and every gauge below it on the Don, and none of the gauges above where it joins. For each, the gauge nearest the Don is shown; its own page lists the rest.
Joins the Don between Oxspring Bower Hill and Wharncliffe Side, no more than 7.7 km by river above Wharncliffe Side. Nearest the Don: Stocksbridge Steelworks Normal.
Joins the Don between Wharncliffe Side and Sheffield Lady's Bridge, no more than 3.7 km by river above Sheffield Lady's Bridge. Nearest the Don: Malinbridge Low; 1 more gauge further up.
Joins the Don between Sheffield Lady's Bridge and Hadfields, no more than 1.8 km by river above Hadfields. Nearest the Don: Grimesthorpe Normal.
Joins the Don between Sheffield Lady's Bridge and Hadfields, no more than 4.4 km by river above Hadfields. Nearest the Don: Sheffield Carr Brook Screen Normal.
Joins the Don between Sheffield Lady's Bridge and Hadfields, no more than 6.8 km by river above Hadfields. Nearest the Don: Sheffield Station Normal; 1 more gauge further up.
Joins the Don between Sheffield Lady's Bridge and Hadfields, no more than 7.2 km by river above Hadfields. Nearest the Don: Highfield Normal; 3 more gauges further up. Gauged streams joining it: Meers Brook.
Joins the Don between Hadfields and Rotherham, no more than 5.6 km by river above Rotherham. Nearest the Don: Sheffield Wincobank Normal; 3 more gauges further up. Gauged streams joining it: Charlton Brook and Whitley Brook.
Joins the Don between Rotherham and Rotherham Forge Island, no more than 4.0 km by river above Rotherham Forge Island. Nearest the Don: Canklow Regulator Low; 24 more gauges further up. Gauged streams joining it: Rother Washlands and Ulley Brook.
Joins the Don between Mexborough Lock and Sprotbrough, no more than 6.0 km by river above Sprotbrough. Nearest the Don: Mexborough Dearne Mouth Normal; 14 more gauges further up. Gauged streams joining it: River Dearne.
Joins the Don between Mexborough Lock and Sprotbrough, no more than 4.7 km by river above Sprotbrough. Nearest the Don: Conisbrough Normal.
Joins the Don between Doncaster and Kirk Bramwith, no more than 4.5 km by river above Kirk Bramwith. Nearest the Don: Norwood Normal; 2 more gauges further up. Gauged streams joining it: Hague Hall Beck.
Joins the Don between Doncaster and Kirk Bramwith, no more than 9.9 km by river above Kirk Bramwith. Nearest the Don: Bentley Ings Screen Low.
Below Fishlake, its water next reaches Blacktoft, a gauge on River Ouse, 27.3 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.
313 storm overflows are traced upstream of Fishlake, the Don’s lowest gauge on the river map: on the Don itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Fishlake: 6,913 spills over 36,828 hours in total, across all 313.
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 Don 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 →
and 2 more: show all 5 overflows on this stretch → All above Oxspring Bower Hill, nearest first →
and 6 more: show all 9 overflows on this stretch → All above Wharncliffe Side, nearest first →
and 10 more: show all 13 overflows on this stretch → All above Sheffield Lady's Bridge, nearest first →
and 5 more: show all 8 overflows on this stretch → All above Malinbridge, nearest first →
and 23 more: show all 26 overflows on this stretch → All above Hadfields, nearest first →
and 7 more: show all 10 overflows on Porter Brook and the streams that join it → All above Sheffield Station, nearest first →
and 13 more: show all 16 overflows on the Sheaf and the streams that join it → All above Highfield, nearest first →
and 7 more: show all 10 overflows on this stretch → All above Rotherham, nearest first →
and 11 more: show all 14 overflows on this stretch → All above Sheffield Wincobank, nearest first →
and 2 more: show all 5 overflows on this stretch → All above Rotherham Forge Island, nearest first →
and 91 more: show all 94 overflows on the Rother and the streams that join it → All above Canklow Regulator, nearest first →
and 10 more: show all 13 overflows on this stretch → All above Kilnhurst Lower, nearest first →
and 2 more: show all 5 overflows on this stretch → All above Mexborough Lock, nearest first →
and 67 more: show all 70 overflows on the Dearne Washlands and the streams that join it → All above Mexborough Dearne Mouth, nearest first →
Within 3 km of one of the Don’s gauges in a straight line, but the river map cannot say whether their water reaches it.
81 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: © 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.
243 sampling points on the River Don and the streams that join it above Fishlake. 59 have a sample from the last 12 months; 85 have any sample banked.
Sampled most recently, anywhere on the Don and its streams:
| Where, from the source down | Sampling points | Newest sample |
|---|---|---|
| River Rother and its streamsjoins the Don above Rotherham Forge Island | 77 points23 sampled | 30 Sep 2026 |
| Above Penistone | 4 points3 sampled | 4 Jun 2026 |
| Above Oxspring Bower Hill | 7 points1 sampled | 21 May 2026 |
| Above Stocksbridge SteelworksThe Porter River · joins the Don above Wharncliffe Side | 6 points3 sampled | 15 Sep 2026 |
| Above Wharncliffe Side | 13 points6 sampled | 24 Aug 2026 |
| River Sheaf and its streamsjoins the Don above Hadfields | 11 points3 sampled | 21 Sep 2026 |
| River Loxley and its streamsjoins the Don above Sheffield Lady's Bridge | 8 points3 sampled | 30 Sep 2026 |
| Porter Brook and its streamsjoins the Don above Hadfields | 6 points0 sampled | none banked |
| Blackburn Brook and its streamsjoins the Don above Rotherham | 6 points1 sampled | 5 Aug 2026 |
| Above Sheffield Lady's Bridge | 6 points2 sampled | 24 Aug 2026 |
| Above Sheffield Carr Brook ScreenCar Brook · joins the Don above Hadfields | 1 point0 sampled | none banked |
| Above Hadfields | 7 points3 sampled | 9 Jul 2026 |
| Above Rotherham | 4 points2 sampled | 5 Aug 2026 |
| Above Rotherham Forge Island | 2 points0 sampled | none banked |
| Above Kilnhurst Lower | 10 points4 sampled | 10 Jun 2026 |
| Dearne Washlands and its streamsjoins the Don above Sprotbrough | 58 points24 sampled | 11 Sep 2026 |
| Above Mexborough Lock | 1 point0 sampled | none banked |
| Above ConisbroughKearsley Brook · joins the Don above Sprotbrough | 2 points1 sampled | 20 May 2026 |
| Above Sprotbrough | 4 points1 sampled | 11 Aug 2026 |
| Above Doncaster | 2 points | 13 Aug 2026 |
| Above Bentley Ings ScreenNew Cut · joins the Don above Kirk Bramwith | 1 point0 sampled | none banked |
| Above Adwick le Street White Cross BridgeEa Beck · joins the Don above Kirk Bramwith | 5 points2 sampled | 27 Mar 2026 |
| Above Fishlake | 2 points1 sampled | 5 Jul 2024 |
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.
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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