Polluted by sewage 2,803 hours in 2025 , monitoring offline 5,370 hours
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Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Offline/Potential Pollution |
|---|---|---|---|---|---|
| Yorkshire Water | OSWALDKIRK/STW | Holbeck | 78 | 747h 7m | - |
| Yorkshire Water | AMPLEFORTH VILLAGE/STW | Holbeck | 41 | 635h 52m | 20 h |
| Yorkshire Water | HOWSHAM/STW | River Derwent | 27 | 299h 39m | - |
| Yorkshire Water | FOSTON/STW | Spital Beck | 30 | 262h 31m | - |
| Yorkshire Water | CONEYSTHORPE/STW | Mill Hills Beck | 14 | 236h 30m | - |
| Yorkshire Water | HELMSLEY/STW | River Rye | 43 | 221h 1m | - |
| Yorkshire Water | OULSTON/STW | River Kyle | 59 | 178h 48m | - |
| Yorkshire Water | GILLING EAST/STW | Holbeck | 12 | 104h 14m | - |
| Yorkshire Water | CRAMBE/STW | River Derwent | 12 | 58h 47m | - |
| Yorkshire Water | SAWMILL LANE/CSO | River Rye | 23 | 37h 44m | - |
| Yorkshire Water | AMPLEFORTH/CSO | Holbeck | 9 | 11h 34m | - |
| Yorkshire Water | RYEDALE NEW ROAD/CSO | Wath Beck | 10 | 4h 35m | - |
| Yorkshire Water | COXWOLD/STW | Green'S Beck | 2 | 2h 7m | - |
| Yorkshire Water | HOVINGHAM/STW | Marrs Beck | 1 | 1h 58m | - |
| Yorkshire Water | BRANDSBY ROAD/NO 1 CSO | River Kyle | 1 | 0h 42m | 3,340 h |
| Yorkshire Water | BRANDSBY ROAD/NO 2 CSO | Not Matched In Ea Consents Database | 0 | 0h | 2,009 h |
| Yorkshire Water | FIRBY/STW | Derwent | 0 | 0h | - |
| Yorkshire Water | Unknown | Unknown | 0 | 0h | - |
| Yorkshire Water | RYEDALE CARR LANE/CSO | Holbeck | 0 | 0h | - |
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.