75 storm overflows are traced upstream of Rother Valley Lake, the Rother Washlands’s lowest gauge on the river map: on the Rother Washlands itself, on its gauged tributaries, and on smaller streams that join above there.
- 0 report discharging now
- 71 not discharging
- 4 offline or silent: 2 monitor offline, 1 status unknown, 1 no live feed
Official figures for 2025, for the overflows traced upstream of Rother Valley Lake: 1,799 spills over 10,311 hours in total, across all 75.
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 Rother Washlands 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 →
River Rother, and the streams that join itjoins the Rother Washlands above Rother Valley Lake75 overflows
- Market Street Cs0 Not discharging
Yorkshire Water · into The Moss · 210 m by river above Eckington Rotherham Road · 2025: 6 spills, 1.8 h - Rotherside Road CSO Not discharging
Yorkshire Water · into River Moss · 2.3 km by river above Killamarsh · 2025: 1 spill, 0.3 h - Eckington CSO Not discharging
Yorkshire Water · into River Moss · 2.0 km by river above Killamarsh · 2025: 22 spills, 21 h
and 72 more: show all 75 overflows on the Rother and the streams that join it → All above Killamarsh, nearest first →
Near these gauges, connection not known
Within 3 km of one of the Rother Washlands’s gauges in a straight line, but the river map cannot say whether their water reaches it.
- Sheffield Road Kilmarsh CSO Not discharging
Yorkshire Water · into River Rother · 510 m from Rother Valley Lake in a straight line · no mapped watercourse close enough to be sure · 2025: 41 spills, 230 h - Norwood SPS Not discharging
Yorkshire Water · into County Dyke To River Rother · 1.2 km from Rother Valley Lake in a straight line · no mapped watercourse close enough to be sure · 2025: 21 spills, 63 h - The Mill No 2 CSO Not discharging
Yorkshire Water · into Trib Of Short Brook · 1.7 km from Rother Valley Lake in a straight line · its watercourse is not on the river map · 2025: 31 spills, 72 h
3 more near these gauges whose connection is not known.
1 other overflow within 3 km of these gauges is placed below the Rother Washlands’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 →
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.
