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Polluted by sewage 8,390 hours in 2025
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We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Grantham and Bourne, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Total Duration (days) |
|---|---|---|---|---|---|
| Anglian Water | LONG BENNINGTON WRC | River Witham | 46 | 711 h 39m | 29.62 |
| Anglian Water | CLAYPOLE STW | River Witham | 34 | 612 h 15m | 25.5 |
| Anglian Water | BOURNE STW | Bourne Eau + Black Sluice Dyke | 36 | 605 h 39m | 25.21 |
| Anglian Water | OSBOURNBY STW | S.Beck N.Beck South Forty Foot | 37 | 601 h 4m | 25.04 |
| Anglian Water | LONG BENNINGTON-CHURCH ST TPS | Ease Drain | 30 | 599 h 42m | 24.96 |
| Anglian Water | CLAYPOLE-WELFEN LA TPS | Claypole Drain South | 34 | 592 h | 24.67 |
| Anglian Water | MARSTON STW (LINCS) | River Witham | 30 | 591 h 49m | 24.62 |
| Anglian Water | Bourne STW_A3 | Bourne Eau + Black Sluice Dyke | 32 | 567 h 18m | 23.62 |
| Anglian Water | FULBECK STW | Beck | 36 | 562 h 41m | 23.42 |
| Anglian Water | DYKE-VILLAGE ST SP | Unknown South Of Dyke Dr | 26 | 535 h 34m | 22.29 |
| Anglian Water | LONG BENNINGTON-WATERLANE SSO | Dike River Witham | 19 | 355 h 44m | 14.79 |
| Anglian Water | CLAYPOLE-WELFEN LA TPS | Claypole Drain South | 20 | 343 h 20m | 14.29 |
| Anglian Water | LONG BENNINGTON WRC | River Witham | 27 | 328 h 50m | 13.67 |
| Anglian Water | BOURNE STW | Bourne Eau + Black Sluice Dyke | 15 | 157 h 2m | 6.54 |
| Anglian Water | OSBOURNBY STW | S.Beck N.Beck South Forty Foot | 12 | 132 h 8m | 5.5 |
| Anglian Water | CLAYPOLE STW | River Witham | 15 | 126 h 43m | 5.25 |
| Anglian Water | FULBECK STW | Beck | 19 | 119 h 1m | 4.96 |
| Anglian Water | HECKINGTON WRC | Heckington Eau | 6 | 86 h 45m | 3.58 |
| Anglian Water | GT GONERBY-BELTON LANE SP | Running Furrows Drain River Wi | 22 | 85 h 21m | 3.54 |
| Anglian Water | MARSTON STW (LINCS) | River Witham | 10 | 84 h 55m | 3.5 |
| Anglian Water | HARLAXTON STW | Grantham Canal | 7 | 82 h 30m | 3.42 |
| Severn Trent Water | WOOLSTHORPE STW (SSTO) | River Devon | 7 | 60 h 37m | 2.5 |
| Severn Trent Water | WOOLSTHORPE STW (SSTO) | River Devon | 8 | 53 h 23m | 2.21 |
| Anglian Water | GT HALE SP | Beck | 9 | 44 h 31m | 1.83 |
| Anglian Water | GT GONERBY-BELTON LANE SP | Running Furrows Drain River Wi | 7 | 43 h 44m | 1.79 |
| Anglian Water | HELPRINGHAM STW | Helpringham Eau South Forty Fo | 3 | 43 h 4m | 1.79 |
| Anglian Water | HECKINGTON WRC | Heckington Eau | 7 | 36 h 14m | 1.5 |
| Anglian Water | DYKE-VILLAGE ST SP | Unknown South Of Dyke Dr | 4 | 33 h 45m | 1.38 |
| Anglian Water | HARLAXTON STW | Grantham Canal | 6 | 31 h 9m | 1.29 |
| Anglian Water | MANTHORPE-MILL SP | Running Furrows Drain | 6 | 28 h 58m | 1.17 |
| Anglian Water | HELPRINGHAM STW | Helpringham Eau South Forty Fo | 4 | 27 h | 1.12 |
| Anglian Water | LONG BENNINGTON-CHURCH ST TPS | Ease Drain | 6 | 19 h 30m | 0.79 |
| Anglian Water | DRY DODDINGTON TPS | Unnamed Dyke To River Witham | 2 | 19 h 29m | 0.79 |
| Anglian Water | STORM WATER ALMA PARK | Unknown | 3 | 18 h 45m | 0.75 |
| Anglian Water | MANTHORPE-MILL SP | Running Furrows Drain | 13 | 16 h 1m | 0.67 |
| Anglian Water | Bourne STW_A3 | Bourne Eau + Black Sluice Dyke | 2 | 14 h 12m | 0.58 |
| Anglian Water | STORM WATER ALMA PARK | Unknown | 7 | 8 h 42m | 0.33 |
| Anglian Water | LONG BENNINGTON-WATERLANE SSO | Dike River Witham | 1 | 3 h 30m | 0.12 |
| Anglian Water | LONG BENNINGTON-CHURCH ST TPS | Ease Drain | 1 | 2 h 30m | 0.08 |
| Anglian Water | LONG BENNINGTON-CHURCH ST TPS | Ease Drain | 1 | 1 h 45m | 0.04 |
| Anglian Water | WILSFORD STW | To Swallow Hole | 1 | 0 h 59m | 0 |
| Anglian Water | DRY DODDINGTON TPS | Unnamed Dyke To River Witham | 1 | 0 h 45m | 0 |
| Anglian Water | Grantham - Bridge End Grove CSO | River Witham | 0 | 0 h | 0 |
| Anglian Water | ALLINGTON STW | Foston Beck | 0 | 0 h | 0 |
| Anglian Water | WILSFORD STW | To Swallow Hole | 0 | 0 h | 0 |
| Anglian Water | GT HALE SP | Beck | 0 | 0 h | 0 |
| Anglian Water | FOSTON SP | Unnamed Drain | 0 | 0 h | 0 |
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