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Polluted by sewage 946 hours in 2025 , monitoring offline 3,787 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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| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Offline/Potential Pollution |
|---|---|---|---|---|---|
| Severn Trent Water | TICKHILL STW (SSTO) | Slutwell Stream | 37 | 197 h 7m | - |
| Severn Trent Water | BRAITHWELL STW (SSTO) | Ruddle Dyke Glen | 31 | 142 h 39m | - |
| Yorkshire Water | BALBY/STW/STORM TREATMENT | Mother Drain | 10 | 112 h 35m | - |
| Yorkshire Water | SANDALL/STW | River Don | 16 | 106 h 40m | - |
| Severn Trent Water | TICKHILL STW (SSTO) | Slutwell Stream | 25 | 106 h 16m | - |
| Severn Trent Water | BRAITHWELL STW (SSTO) | Ruddle Dyke Glen | 13 | 66 h 44m | - |
| Severn Trent Water | ARMTHORPE STW (SSTO) | Fores Drain | 12 | 47 h 30m | - |
| Yorkshire Water | WHEATLEY/NO 2 CSO | An Unnamed Shef | 12 | 43 h 26m | - |
| Yorkshire Water | BELLE VUE/CSO | Lady Bank Drain | 6 | 33 h 2m | - |
| Yorkshire Water | BELLE VUE/CSO | Lady Bank Drain | 6 | 25 h 8m | - |
| Yorkshire Water | BOUNDARY AVENUE/CSO | Not Matched In Ea Consents Database | 5 | 15 h 37m | 3,415 h |
| Severn Trent Water | TICKHILL STW (CSO) | Slutwell Stream | 11 | 13 h 41m | 360 h |
| Yorkshire Water | RAINTON ROAD/NO 1 CSO | Not Matched In Ea Consents Database | 6 | 13 h 20m | - |
| Severn Trent Water | ARMTHORPE STW (SSTO) | Fores Drain | 6 | 12 h 28m | - |
| Yorkshire Water | BALBY/STW/6XDWF OVERFLOW | Mother Drain | 2 | 4 h 1m | - |
| Severn Trent Water | ARMTHORPE - COWHOUSE LANE (CSO) | Diggin Dyke | 4 | 4 h | 12 h |
| Severn Trent Water | TICKHILL STW (CSO) | Slutwell Stream | 2 | 1 h 18m | - |
| Yorkshire Water | CROSSWAYS/CSO | River Don | 2 | 0 h 43m | - |
| Severn Trent Water | WADWORTH - DAW LANE (SSO) | Salter Sike Drain | 1 | 0 h 7m | - |
| Yorkshire Water | HARROWDEN ROAD/CSO | Drain Leading To River Don | 0 | 0 h | - |
| Yorkshire Water | RAINTON ROAD/NO 2 CSO | Not Matched In Ea Consents Database | 0 | 0 h | - |
| Severn Trent Water | WADWORTH - DAW LANE (SSO) | Salter Sike Drain | 0 | 0 h | - |
| Severn Trent Water | ARMTHORPE - COWHOUSE LANE (CSO) | Diggin Dyke | 0 | 0 h | - |
| Yorkshire Water | STOCKIL ROAD/CSO | Not Matched In Ea Consents Database | 0 | 0 h | - |
| Yorkshire Water | SMITHS SQUARE/CSO | River Don | 0 | 0 h | - |
| Yorkshire Water | WHITBURN ROAD/CSO | Not Matched In Ea Consents Database | 0 | 0 h | - |
| Yorkshire Water | DONCASTER INTERCHANGE/CSO | Culverted River Cheswold | 0 | 0 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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org