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Polluted by sewage 2,989 hours in 2025 , monitoring offline 42,407 hours , potential overflows 275 hours
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 | HARROGATE NORTH/STW/3XDWF OVERFLOW | Oak Beck | 45 | 328h 46m | - |
| Yorkshire Water | KNARESBOROUGH/STW | River Nidd | 33 | 326h 56m | - |
| Yorkshire Water | CRIMPLE LANE/NO 2 CSO | Crimple Beck | 52 | 295h 29m | - |
| Yorkshire Water | STAVELEY QUARRY/NO 2 CSO | Tanner Beck | 29 | 287h 23m | - |
| Yorkshire Water | SHERWOOD DRIVE/CSO | Rud Beck | 41 | 204h 21m | - |
| Yorkshire Water | MANSE LANE 57/CSO | River Nidd | 47 | 182h 19m | 297 h |
| Yorkshire Water | HOOKSTONE ROAD/CSO | Hookstone Beck | 23 | 130h 32m | - |
| Yorkshire Water | HARROGATE NORTH/STW/6XDWF OVERFLOW | Oak Beck | 29 | 93h 59m | - |
| Yorkshire Water | ST MARYS WALK XXX/CSO | Oak Beck And Coppice Beck | 41 | 85h 56m | - |
| Yorkshire Water | STRAY ROAD/CSO | Hookstone Beck | 19 | 83h 38m | - |
| Yorkshire Water | HOLLINS CLOSE/CSO | Nidd And S | 13 | 71h 1m | 29 h |
| Yorkshire Water | JENNY PLAIN BRIDGE/CSO | Oak Beck And Coppice Beck | 17 | 58h 42m | 331 h |
| Yorkshire Water | ALMSFORD AVENUE/CSO | Crimple Beck | 20 | 57h 1m | 488 h |
| Yorkshire Water | HOTEL MAJESTIC/CSO | Oak Beck And Coppice Beck | 24 | 55h 11m | 537 h |
| Yorkshire Water | BLACK SWAN/CSO | Crimple Beck Or River Crimple | 14 | 54h 58m | - |
| Yorkshire Water | WATERSIDE 47/CSO | Mill Stream | 27 | 53h 50m | 520 h |
| Yorkshire Water | PANNAL BRIDGE/CSO | River Crimple Via Sewer | 18 | 48h 21m | - |
| Yorkshire Water | GOLDSBOROUGH/CSO | New Cut | 33 | 47h 13m | - |
| Yorkshire Water | HAMBLETON ROAD/CSO | Clvrt Bilton Beck | 7 | 41h 50m | 15 h |
| Yorkshire Water | WATERSIDE 48/CSO | Mill Stream | 23 | 38h 36m | 128 h |
| Yorkshire Water | CRAGG TOP/CSO | River Nidd | 8 | 38h 11m | 147 h |
| Yorkshire Water | ST MARYS WALK 29/CSO | Oak Beck And Coppice Beck | 23 | 36h 24m | - |
| Yorkshire Water | THE GRANARY/CSO | Nidd And S | 4 | 34h 14m | 18 h |
| Yorkshire Water | ALBERT STREET/CSO | Oak Beck And Coppice Beck | 26 | 34h 12m | - |
| Yorkshire Water | ABBEY ROAD/NO 2 CSO | River Nidd | 17 | 33h 11m | 576 h |
| Yorkshire Water | FULWITHMILL FARM/NO 2 CSO | Crimple Beck | 4 | 27h 55m | - |
| Yorkshire Water | LOW MOOR LANE/CSO | Jumwell Beck | 6 | 27h 1m | - |
| Yorkshire Water | BILTON LANE BECK/CSO | Bilton Beck | 14 | 26h 27m | 673 h |
| Yorkshire Water | ST MARYS WALK 7/CSO | Oak Beck And Coppice Beck | 9 | 24h 40m | - |
| Yorkshire Water | KILLINGHALL/NO 2 CSO | Nidd | 10 | 24h 13m | - |
| Yorkshire Water | SPITAL CROFT/CSO | River Nidd | 13 | 20h 13m | - |
| Yorkshire Water | HYDE PARK ROAD/CSO | Oak Beck And Coppice Beck | 28 | 17h 44m | 78 h |
| Yorkshire Water | STRAWBERRY DALE/CSO | Oak Beck And Coppice Beck | 17 | 15h 31m | - |
| Yorkshire Water | OAKDALE AVENUE/CSO | Oak Beck | 14 | 15h | - |
| Yorkshire Water | ST MARYS WALK 30/CSO | Oak Beck And Coppice Beck | 10 | 13h 51m | 19 h |
| Yorkshire Water | COLD BATH ROAD/CSO | Oak Beck And Coppice Beck | 2 | 13h 9m | - |
| Yorkshire Water | FOREST LANE/NO 2 CSO | Culverted Star Beck | 8 | 9h 19m | - |
| Yorkshire Water | MONTPELLIER RD27/CSO | Oak Beck And Coppice Beck | 11 | 9h 11m | - |
| Yorkshire Water | WATERSIDE 49/CSO | River Nidd | 12 | 9h 1m | - |
| Yorkshire Water | HOOKSTONE DRIVE/NO 2 CSO | Culverted Rud Beck/Publicsewer | 11 | 7h 5m | 6,106 h |
| Yorkshire Water | OAKDALE HARROGATE/CSO | Oak Beck | 6 | 5h 19m | - |
| Yorkshire Water | CAMBRIDGE STREET/CSO | Oak Beck And Coppice Beck | 4 | 1h 3m | - |
| Yorkshire Water | WEST PARK/CSO | Oak Beck And Coppice Beck | 1 | 0h 12m | - |
| Yorkshire Water | BOROUGHBRIDGE ROAD/CSO | Frogmire Dyke | 1 | 0h 11m | - |
| Yorkshire Water | SKIPTON ROAD 109/CSO | Oak Beck Via A Public Sewer | 1 | 0h 5m | - |
| Yorkshire Water | ABBEY MILL/CSO | River Nidd | 0 | 0h | 1,649 h |
| Yorkshire Water | STRAY REIN/CSO | Hoohstone Beck | 0 | 0h | - |
| Yorkshire Water | WEDDERBURN SCHOOL/CSO | Rud Beck Via A Public Sewer | 0 | 0h | - |
| Yorkshire Water | HOOKSTONE GRANGE WAY/CSO | Rud Beck Via Public Sewer | 0 | 0h | - |
| Yorkshire Water | SKIPTON ROAD 33/CSO | Oak Beck Via A Public Sewer | 0 | 0h | - |
| Yorkshire Water | UNITY GROVE/CSO | Oak Beck Via Public Sewer | 0 | 0h | 8,656 h |
| Yorkshire Water | CHUDLEIGH ROAD/CSO | Oak Beck And Coppice Beck | 0 | 0h | 6,176 h |
| Yorkshire Water | SKIPTON ROAD 179/CSO | Oak Beck Via Public Sewer | 0 | 0h | 8,464 h |
| Yorkshire Water | SKIPTON ROAD 83/CSO | Oak Beck Via A Public Sewer | 0 | 0h | - |
| Yorkshire Water | KINGS ROAD/CSO | Oak Beck And Coppice Beck | 0 | 0h | - |
| Yorkshire Water | GREENFIELDS ROAD/NO 3 CSO | Rud Beck Via A Public Sewer | 0 | 0h | - |
| Yorkshire Water | VILLAGE GREEN/CSO | River Nidd | 0 | 0h | 7,767 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
Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.
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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org