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Live levels from 1 monitoring station across South Yorkshire, updated every 15 minutes.
| Station | Level now | Status |
|---|---|---|
| Stocksbridge Steelworks | 0.22 m 47m 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 Porter River 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.
No gauged tributary joins the Porter River above Stocksbridge Steelworks on the river map. Streams without a gauge are not counted here.
Below Stocksbridge Steelworks, its water next reaches Wharncliffe Side, a gauge on River Don, 7.7 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.
None of the storm overflows FloodRadar holds is traced upstream of Stocksbridge Steelworks on the river map. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow.
4 other overflows within 3 km of these gauges are placed below the Porter River’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 →
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.
9 sampling points on the Porter River and the streams that join it above Stocksbridge Steelworks, and below it. 2 have a sample from the last 12 months; 4 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) |
|---|---|---|---|---|
| Little Don at Crookland Wood | The Porter River | 7.6 km | Last sampled 4 Sep 2023, before the imported period | |
| Little Don below Langsett Filters | The Porter River | 5.1 km | Last sampled 19 Mar 2019, before the imported period | |
| Little Don at Midhopestones Bridge | The Porter River | 2.6 km | Last sampled 8 Mar 2017, before the imported period | |
| Little Don downstream of Underbank Reservoir | The Porter River | 0.7 km | 16 Jun 2026 · 4 months ago | Oxygen 98.2%Temp 14.7 °CpH 7.55Ammonia 0.051 mg/l |
| Little Don at Stocksbridge | The Porter River | 0.7 km | 15 Sep 2026 · 23 days ago | Oxygen 93.1%Temp 16.3 °CpH 7.11Ammonia 0.036 mg/l |
| Little Don at Manchester Road (above BSC) | The Porter River | 0.4 km | 20 Mar 2024 · 2.6 years ago | pH 7.85 |
| Sampling point | Watercourse (map) | Below the gauge | Last sample | Latest results (river water) |
|---|---|---|---|---|
| Little Don downstream of Stocksbridge Culvert | The Porter River | 1.7 km | Last sampled 21 Oct 2010, before the imported period | |
| Little Don at Hen Holmes Footbridge | The Porter River | 2.2 km | Last sampled 5 Mar 2020, before the imported period | |
| Little Don at Deepcar | The Porter River | 3.3 km | 20 Mar 2024 · 2.6 years ago | pH 7.84 |
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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