Polluted by sewage 2,903 hours in 2026 , monitoring offline 25,865 hours , potential overflows 52 hours so far..
What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.
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Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Offline/Potential Pollution |
|---|---|---|---|---|---|
| Yorkshire Water | STAVELEY QUARRY/NO 2 CSO | Tanner Beck | 34 | 536h 52m | - |
| Yorkshire Water | HARROGATE NORTH/STW/3XDWF OVERFLOW | Oak Beck | 32 | 359h 39m | - |
| Yorkshire Water | KNARESBOROUGH/STW | River Nidd | 27 | 350h 50m | - |
| Yorkshire Water | THE GRANARY/CSO | Nidd And S | 22 | 285h 32m | 132 h |
| Yorkshire Water | ALMSFORD AVENUE/CSO | Crimple Beck | 18 | 285h 23m | 52 h |
| Yorkshire Water | CRIMPLE LANE/NO 2 CSO | Crimple Beck | 27 | 192h 15m | - |
| Yorkshire Water | SHERWOOD DRIVE/CSO | Rud Beck | 23 | 152h 14m | - |
| Yorkshire Water | HOOKSTONE ROAD/CSO | Hookstone Beck | 13 | 115h 2m | - |
| Yorkshire Water | MANSE LANE 57/CSO | River Nidd | 23 | 108h 55m | - |
| Yorkshire Water | HOOKSTONE GRANGE WAY/CSO | Rud Beck Via Public Sewer | 6 | 92h 21m | - |
| Yorkshire Water | OAKDALE HARROGATE/CSO | Oak Beck | 9 | 71h 56m | - |
| Yorkshire Water | HARROGATE NORTH/STW/6XDWF OVERFLOW | Oak Beck | 14 | 50h 1m | - |
| Yorkshire Water | ST MARYS WALK XXX/CSO | Oak Beck And Coppice Beck | 22 | 46h 4m | 7 h |
| Yorkshire Water | STRAY ROAD/CSO | Hookstone Beck | 8 | 43h 55m | 7 h |
| Yorkshire Water | HOTEL MAJESTIC/CSO | Oak Beck And Coppice Beck | 10 | 24h 15m | 8 h |
| Yorkshire Water | BLACK SWAN/CSO | Crimple Beck Or River Crimple | 15 | 21h 26m | 7 h |
| Yorkshire Water | ABBEY ROAD/NO 2 CSO | River Nidd | 5 | 19h 1m | - |
| Yorkshire Water | WATERSIDE 48/CSO | Mill Stream | 7 | 18h 6m | 7 h |
| Yorkshire Water | WATERSIDE 47/CSO | Mill Stream | 9 | 16h 3m | 1,008 h |
| Yorkshire Water | KILLINGHALL/NO 2 CSO | Nidd | 4 | 15h 10m | - |
| Yorkshire Water | BILTON LANE BECK/CSO | Bilton Beck | 10 | 14h 20m | - |
| Yorkshire Water | PANNAL BRIDGE/CSO | River Crimple Via Sewer | 7 | 11h 33m | 1 h |
| Yorkshire Water | ST MARYS WALK 29/CSO | Oak Beck And Coppice Beck | 11 | 10h 31m | 10 h |
| Yorkshire Water | HOOKSTONE DRIVE/NO 2 CSO | Culverted Rud Beck/Publicsewer | 2 | 8h 48m | 8 h |
| Yorkshire Water | ALBERT STREET/CSO | Oak Beck And Coppice Beck | 9 | 8h 17m | 9 h |
| Yorkshire Water | WATERSIDE 49/CSO | River Nidd | 4 | 7h 7m | 8 h |
| Yorkshire Water | SKIPTON ROAD 33/CSO | Oak Beck Via A Public Sewer | 6 | 6h 59m | 1,986 h |
| Yorkshire Water | LOW MOOR LANE/CSO | Jumwell Beck | 3 | 6h 55m | - |
| Yorkshire Water | STRAWBERRY DALE/CSO | Oak Beck And Coppice Beck | 7 | 5h 24m | 9 h |
| Yorkshire Water | GOLDSBOROUGH/CSO | New Cut | 1 | 3h 18m | 0 h |
| Yorkshire Water | OAKDALE AVENUE/CSO | Oak Beck | 4 | 3h 11m | 10 h |
| Yorkshire Water | ST MARYS WALK 30/CSO | Oak Beck And Coppice Beck | 5 | 2h 24m | 9 h |
| Yorkshire Water | MONTPELLIER RD27/CSO | Oak Beck And Coppice Beck | 4 | 2h 2m | - |
| Yorkshire Water | HYDE PARK ROAD/CSO | Oak Beck And Coppice Beck | 4 | 1h 56m | - |
| Yorkshire Water | HOLLINS CLOSE/CSO | Nidd And S | 3 | 1h 35m | - |
| Yorkshire Water | JENNY PLAIN BRIDGE/CSO | Oak Beck And Coppice Beck | 3 | 1h 19m | 99 h |
| Yorkshire Water | ST MARYS WALK 7/CSO | Oak Beck And Coppice Beck | 3 | 1h | - |
| Yorkshire Water | FOREST LANE/NO 2 CSO | Culverted Star Beck | 1 | 0h 49m | 0 h |
| Yorkshire Water | SKIPTON ROAD 109/CSO | Oak Beck Via A Public Sewer | 2 | 0h 22m | - |
| Yorkshire Water | CHUDLEIGH ROAD/CSO | Oak Beck And Coppice Beck | 1 | 0h 19m | - |
| Yorkshire Water | CAMBRIDGE STREET/CSO | Oak Beck And Coppice Beck | 1 | 0h 14m | - |
| Yorkshire Water | SPITAL CROFT/CSO | River Nidd | 1 | 0h 10m | 436 h |
| Yorkshire Water | HAMBLETON ROAD/CSO | Clvrt Bilton Beck | 0 | 0h | - |
| Yorkshire Water | SKIPTON ROAD 83/CSO | Oak Beck Via A Public Sewer | 0 | 0h | 2,777 h |
| Yorkshire Water | FULWITHMILL FARM/NO 2 CSO | Crimple Beck | 0 | 0h | - |
| Yorkshire Water | UNITY GROVE/CSO | Oak Beck Via Public Sewer | 0 | 0h | 3,158 h |
| Yorkshire Water | SKIPTON ROAD 179/CSO | Oak Beck Via Public Sewer | 0 | 0h | 3,299 h |
| Yorkshire Water | COLD BATH ROAD/CSO | Oak Beck And Coppice Beck | 0 | 0h | 685 h |
| Yorkshire Water | WEST PARK/CSO | Oak Beck And Coppice Beck | 0 | 0h | - |
| Yorkshire Water | KINGS ROAD/CSO | Oak Beck And Coppice Beck | 0 | 0h | - |
| Yorkshire Water | BOROUGHBRIDGE ROAD/CSO | Frogmire Dyke | 0 | 0h | - |
| Yorkshire Water | STRAY REIN/CSO | Hoohstone Beck | 0 | 0h | 2,787 h |
| Yorkshire Water | CRAGG TOP/CSO | River Nidd | 0 | 0h | - |
| Yorkshire Water | VILLAGE GREEN/CSO | River Nidd | 0 | 0h | 3,299 h |
| Yorkshire Water | GREENFIELDS ROAD/NO 3 CSO | Rud Beck Via A Public Sewer | 0 | 0h | 2,787 h |
| Yorkshire Water | WEDDERBURN SCHOOL/CSO | Rud Beck Via A Public Sewer | 0 | 0h | - |
| Yorkshire Water | ABBEY MILL/CSO | River Nidd | 0 | 0h | 3,299 h |
EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water
Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API
Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.
This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.
This project is not associated, approved or endorsed by any of the companies whose logos you see here.