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Polluted by sewage 13,583 hours in 2025 - That's 1.57 years
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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 Gainsborough, 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 | NETTLEHAM STW | Nettleham Beck | 88 | 1,243 h 1m | 51.79 |
| Anglian Water | Market Rasen-Caistor Road Combined Sewer Overflow | River Rase | 60 | 1,233 h 12m | 51.38 |
| Anglian Water | SAXILBY-HIGH ST/MANOR RD SSO | Fossdyke Navigation Canal | 53 | 929 h 19m | 38.71 |
| Anglian Water | NETTLEHAM STW | Nettleham Beck | 40 | 863 h 8m | 35.96 |
| Anglian Water | STURTON BY STOW STW | Sturton Beck River Till | 52 | 732 h 10m | 30.5 |
| Anglian Water | FISKERTON STW | North Delph | 41 | 722 h 31m | 30.08 |
| Anglian Water | DUNHOLME STW | Dunholme Beck | 37 | 671 h 47m | 27.96 |
| Anglian Water | WILLINGHAM STW | River Till River Witham | 58 | 644 h 22m | 26.83 |
| Anglian Water | TEALBY STW | River Rase | 42 | 639 h 42m | 26.62 |
| Anglian Water | S KELSEY-NORTH SP | South Kelsey Drain | 53 | 619 h 48m | 25.79 |
| Anglian Water | SAXILBY STW | Fossdyke Canal | 37 | 584 h 32m | 24.33 |
| Anglian Water | GRASBY WRC | Kettleby Beck | 32 | 534 h 34m | 22.25 |
| Anglian Water | Hemswell (RAF) Camp Sewage Treatment Works | Of Black Dyke | 26 | 510 h 15m | 21.25 |
| Anglian Water | DUNHOLME STW | Dunholme Beck | 28 | 434 h 2m | 18.08 |
| Anglian Water | FISKERTON STW | North Delph | 24 | 402 h 4m | 16.75 |
| Anglian Water | STURTON BY STOW STW | Sturton Beck River Till | 21 | 349 h 16m | 14.54 |
| Anglian Water | Hemswell (RAF) Camp Sewage Treatment Works | Of Black Dyke | 34 | 332 h 29m | 13.83 |
| Anglian Water | TEALBY STW | River Rase | 21 | 289 h 52m | 12.04 |
| Severn Trent Water | GAINSBOROUGH - NORTH WARREN ROAD (CSO) | River Trent | 55 | 281 h 28m | 11.71 |
| Anglian Water | GRASBY WRC | Kettleby Beck | 19 | 258 h 21m | 10.75 |
| Anglian Water | S KELSEY-NORTH SP | South Kelsey Drain | 22 | 221 h 46m | 9.21 |
| Anglian Water | SAXILBY STW | Fossdyke Canal | 25 | 178 h 48m | 7.42 |
| Anglian Water | WILLINGHAM STW | River Till River Witham | 17 | 150 h 36m | 6.25 |
| Severn Trent Water | SCOTTER STW (SSTO) | River Eau | 12 | 118 h 38m | 4.92 |
| Severn Trent Water | SCOTTER STW (SSTO) | River Eau | 13 | 110 h 14m | 4.58 |
| Severn Trent Water | GAINSBOROUGH - BRIDGE STREET (CSO) | River Trent | 27 | 98 h 3m | 4.08 |
| Severn Trent Water | GAINSBOROUGH - NORTH WARREN ROAD (CSO) | River Trent | 13 | 62 h 53m | 2.58 |
| Anglian Water | Market Rasen-Caistor Road Combined Sewer Overflow | River Rase | 9 | 49 h 24m | 2.04 |
| Anglian Water | SCOTHERN TPS | Scothern Fen Drain | 4 | 33 h 59m | 1.38 |
| Anglian Water | High Street, Fiskerton | Unknown North Delph | 5 | 31 h | 1.29 |
| Anglian Water | WADDINGHAM-THE GREEN TPS | Waddingham Beck | 5 | 30 h 39m | 1.25 |
| Severn Trent Water | GAINSBOROUGH - BRIDGE STREET (CSO) | River Trent | 22 | 28 h 7m | 1.17 |
| Severn Trent Water | GAINSBOROUGH - LEA ROAD STW (SSTO) | River Trent | 3 | 25 h 41m | 1.04 |
| Anglian Water | SCOTHERN TPS | Scothern Fen Drain | 5 | 19 h 45m | 0.79 |
| Anglian Water | S KELSEY-SOUTH SP | Dyke South Kelsey Catchwater | 11 | 19 h 24m | 0.79 |
| Anglian Water | KEELBY STW | Caddle Beck | 7 | 17 h 28m | 0.71 |
| Anglian Water | SAXILBY-HIGH ST/MANOR RD SSO | Fossdyke Navigation Canal | 7 | 15 h 52m | 0.62 |
| Anglian Water | OWMBY STW | Unknown | 6 | 15 h 36m | 0.62 |
| Severn Trent Water | BLYTON - HIGH ST PS (BLACK HORSE) (CSO) | Laughton Highland Drain | 8 | 14 h 23m | 0.58 |
| Anglian Water | WADDINGHAM-THE GREEN TPS | Waddingham Beck | 2 | 13 h 50m | 0.54 |
| Anglian Water | CSO and EO at Glentham - Caenby Road SP | Unnamed Dyke To Seggimoor Beck | 3 | 12 h 18m | 0.5 |
| Anglian Water | High Street, Fiskerton | Unknown North Delph | 2 | 5 h 30m | 0.21 |
| Severn Trent Water | AISBY STW (CSO) | Aisby Beck | 4 | 5 h | 0.21 |
| Anglian Water | SNITTERBY SP | Un Black Dyke | 1 | 4 h 49m | 0.17 |
| Anglian Water | S KELSEY-SOUTH SP | Dyke South Kelsey Catchwater | 1 | 3 h 54m | 0.12 |
| Anglian Water | SAXILBY-HIGH ST/WEST BANK SSO | Fossdyke Navigation Canal | 8 | 3 h 44m | 0.12 |
| Anglian Water | CAISTOR STW | Caistor Canal River Ancholme | 4 | 3 h 15m | 0.12 |
| Anglian Water | NORTH KELSEY STW | North Kelsey Beck Rive | 2 | 3 h 2m | 0.12 |
| Severn Trent Water | AISBY STW (CSO) | Aisby Beck | 3 | 2 h 30m | 0.08 |
| Anglian Water | OWMBY STW | Unknown | 3 | 2 h 15m | 0.08 |
| Anglian Water | BARDNEY STW | River Witham | 4 | 1 h 20m | 0.04 |
| Severn Trent Water | BLYTON - HIGH ST PS (BLACK HORSE) (CSO) | Laughton Highland Drain | 1 | 1 h 12m | 0.04 |
| Anglian Water | REEPHAM-KENNEL LA/CLOUGH HIL | Reepham Beck | 2 | 0 h 44m | 0 |
| Severn Trent Water | GAINSBOROUGH - LEA ROAD STW (SSTO) | River Trent | 1 | 0 h 40m | 0 |
| Severn Trent Water | NORTHORPE (STW) | River Eau | 3 | 0 h 34m | 0 |
| Anglian Water | CAISTOR STW | Caistor Canal River Ancholme | 2 | 0 h 17m | 0 |
| Anglian Water | N KELSEY-BRIGG RD TPS | Dyke North Kelsey Beck | 1 | 0 h 1m | 0 |
| Anglian Water | SNITTERBY SP | Un Black Dyke | 0 | 0 h | 0 |
| Anglian Water | MARKET RASEN STW TPS | River Rase | 0 | 0 h | 0 |
| Anglian Water | FISKERTON SP | North Delph | 0 | 0 h | 0 |
| Anglian Water | N KELSEY-BRIGG RD TPS | Dyke North Kelsey Beck | 0 | 0 h | 0 |
| Anglian Water | NETTLEHAM WRC | Nettleham Beck | 0 | 0 h | 0 |
| Anglian Water | SAXILBY-HIGH ST/WEST BANK SSO | Fossdyke Navigation Canal | 0 | 0 h | 0 |
| Anglian Water | BARDNEY STW | River Witham | 0 | 0 h | 0 |
| Anglian Water | KEELBY STW | Caddle Beck | 0 | 0 h | 0 |
| Anglian Water | NORTH KELSEY STW | North Kelsey Beck Rive | 0 | 0 h | 0 |
| Anglian Water | Kexby_#4 Kexby Lane SP | Unnamed Dyke Leading Padmoor D | 0 | 0 h | 0 |
| Anglian Water | REEPHAM-KENNEL LA/CLOUGH HIL | Reepham Beck | 0 | 0 h | 0 |
| Severn Trent Water | NORTHORPE (STW) | River Eau | 0 | 0 h | 0 |
| Anglian Water | MARKET RASEN STW TPS | River Rase | 0 | 0 h | 0 |
| Anglian Water | FISKERTON SP | North Delph | 0 | 0 h | 0 |
| Severn Trent Water | PILHAM (CSO) | Laughton Drain | 0 | 0 h | 0 |
| Anglian Water | REEPHAM STW (LINCS) | Reepham Beck Barling Eau Rive | 0 | 0 h | 0 |
| Anglian Water | CSO and EO at Glentham - Caenby Road SP | Unnamed Dyke To Seggimoor Beck | 0 | 0 h | 0 |
| Anglian Water | MARKET RASEN-GALLAMORE RD SP | River Rase | 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