Polluted by sewage 14,647 hours in 2025 - That's 1.7 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 Ely and East Cambridgeshire, 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 | WILBURTON STW | Grunty Fen Catchwater | 44 | 719 h 23m | 29.96 |
| Anglian Water | WITCHAM WRC | Witcham Catchwater River Ouse | 42 | 706 h 57m | 29.42 |
| Anglian Water | STRETHAM-OFF NEWMARKET RD TPS | Stretham Catchwater | 40 | 656 h 41m | 27.33 |
| Anglian Water | WITCHFORD STW | Fen Drain River Great Ouse | 32 | 572 h 58m | 23.83 |
| Anglian Water | LITTLEPORT STW | Mare Fen Drain | 29 | 565 h 3m | 23.54 |
| Anglian Water | MEPAL STW | 100 Foot River | 32 | 559 h 20m | 23.29 |
| Anglian Water | Ely Water Recycling Centre | River Great Ouse | 34 | 554 h 47m | 23.08 |
| Anglian Water | SUTTON-STATION RD OV | Unnamed South Fen Drain | 74 | 543 h 41m | 22.62 |
| Anglian Water | HADDENHAM WRC | Aldreth Canal | 37 | 539 h 42m | 22.46 |
| Anglian Water | SUTTON-STH OF THE ROW OV | Counter Drain | 29 | 539 h 2m | 22.46 |
| Anglian Water | LITTLE DOWNHAM STW | Pipers Hill Drain River Great | 39 | 534 h 38m | 22.25 |
| Anglian Water | WITCHFORD-THE BROADWAY SP | Grunty Fen Drain | 31 | 530 h 49m | 22.08 |
| Anglian Water | HADDENHAM-NEW TOWN RD SP | Hundred Foot | 26 | 528 h 11m | 22 |
| Anglian Water | CHEVELEY-BROOMSTICK CNR OV | Trb Newmarket No2 Public Drain | 32 | 525 h 46m | 21.88 |
| Anglian Water | STUNTNEY-LOWER STREET SP | Middle Fen Drain | 24 | 524 h 14m | 21.83 |
| Anglian Water | ELY-WEST FEN ROAD SP | A Littleport | 27 | 520 h 41m | 21.67 |
| Anglian Water | LT THETFORD-MAIN ST TPS | Thetford Catchwater | 24 | 514 h 54m | 21.42 |
| Anglian Water | SUTTON-LAWN LANE SP | Hundred Foot Drain | 24 | 512 h 35m | 21.33 |
| Anglian Water | STRETHAM-OFF BERRY GREEN SP | River Great Ouse | 24 | 512 h 25m | 21.33 |
| Anglian Water | COVENEY STW | Ten Mile River | 27 | 511 h | 21.29 |
| Anglian Water | Ely New Water Recycling Centre | Ouse River | 23 | 510 h 25m | 21.25 |
| Anglian Water | SOHAM-CHERRY TREE SP | Soham Lode | 26 | 509 h 45m | 21.21 |
| Anglian Water | PYMORE-MAIN STREET SP | One Hundred Foot Dra | 22 | 507 h 49m | 21.12 |
| Anglian Water | SUTTON-STATION RD OV | Unnamed South Fen Drain | 27 | 351 h 39m | 14.62 |
| Anglian Water | WITCHAM WRC | Witcham Catchwater River Ouse | 18 | 251 h 6m | 10.46 |
| Anglian Water | MEPAL STW | 100 Foot River | 13 | 154 h 31m | 6.42 |
| Anglian Water | Ely Water Recycling Centre | River Great Ouse | 12 | 153 h 4m | 6.38 |
| Anglian Water | SUTTON-STH OF THE ROW OV | Counter Drain | 10 | 132 h 13m | 5.5 |
| Anglian Water | LITTLE DOWNHAM STW | Pipers Hill Drain River Great | 11 | 81 h 55m | 3.38 |
| Anglian Water | WITCHFORD STW | Fen Drain River Great Ouse | 14 | 76 h 8m | 3.17 |
| Anglian Water | LITTLEPORT STW | Mare Fen Drain | 7 | 71 h 19m | 2.96 |
| Anglian Water | STRETHAM-OFF NEWMARKET RD TPS | Stretham Catchwater | 7 | 69 h 58m | 2.88 |
| Anglian Water | DULLINGHAM STW | Newmarket No.1 Public Drain | 10 | 58 h 54m | 2.42 |
| Anglian Water | Ely New Water Recycling Centre | Ouse River | 5 | 54 h 16m | 2.25 |
| Anglian Water | WILBURTON STW | Grunty Fen Catchwater | 7 | 51 h 25m | 2.12 |
| Anglian Water | HADDENHAM WRC | Aldreth Canal | 12 | 42 h 33m | 1.75 |
| Anglian Water | Cambridge Water Recycling Centre | River Cam | 3 | 37 h 25m | 1.54 |
| Anglian Water | WITCHFORD-THE BROADWAY SP | Grunty Fen Drain | 4 | 26 h 33m | 1.08 |
| Anglian Water | ELY-WEST FEN ROAD SP | A Littleport | 2 | 26 h 5m | 1.08 |
| Anglian Water | Cambridge Water Recycling Centre | River Cam | 14 | 24 h 56m | 1 |
| Anglian Water | HADDENHAM-NEW TOWN RD SP | Hundred Foot | 5 | 24 h 15m | 1 |
| Anglian Water | WATERBEACH STW | Bannold Drove Ditch | 2 | 23 h 44m | 0.96 |
| Anglian Water | LT THETFORD-MAIN ST TPS | Thetford Catchwater | 2 | 23 h 33m | 0.96 |
| Anglian Water | STUNTNEY-LOWER STREET SP | Middle Fen Drain | 2 | 22 h 20m | 0.92 |
| Anglian Water | CHEVELEY-BROOMSTICK CNR OV | Trb Newmarket No2 Public Drain | 5 | 20 h 12m | 0.83 |
| Anglian Water | COVENEY STW | Ten Mile River | 7 | 17 h 28m | 0.71 |
| Anglian Water | DULLINGHAM STW | Newmarket No.1 Public Drain | 4 | 16 h 52m | 0.67 |
| Anglian Water | PYMORE-MAIN STREET SP | One Hundred Foot Dra | 2 | 14 h 15m | 0.58 |
| Anglian Water | SUTTON-LAWN LANE SP | Hundred Foot Drain | 2 | 14 h 15m | 0.58 |
| Anglian Water | SOHAM STW | Soham Lode | 2 | 14 h 9m | 0.58 |
| Anglian Water | LITTLEPORT-HOOF CLOSE SSO | Unnamed Ely Ou | 18 | 13 h 22m | 0.54 |
| Anglian Water | STRETHAM-OFF BERRY GREEN SP | River Great Ouse | 2 | 10 h 50m | 0.42 |
| Anglian Water | ELY-WALSINGHAM WAY OV | Relief Channel | 10 | 9 h | 0.38 |
| Anglian Water | WATERBEACH STW | Bannold Drove Ditch | 2 | 8 h 45m | 0.33 |
| Anglian Water | LITTLEPORT-HOOF CLOSE SSO | Unnamed Ely Ou | 7 | 6 h 24m | 0.25 |
| Anglian Water | WICKEN-DRURY LANE SP | Soham Lode | 1 | 5 h 55m | 0.21 |
| Anglian Water | ELY-WALSINGHAM WAY OV | Relief Channel | 4 | 5 h 14m | 0.21 |
| Anglian Water | CHIPPENHAM STW | River Kennett | 7 | 5 h 2m | 0.21 |
| Anglian Water | COTTENHAM BROAD LANE SP 1 | Catchwater Drain Cottenham Lod | 1 | 4 h 40m | 0.17 |
| Anglian Water | Ely Lisle Lane CSO | River Great Ouse | 6 | 4 h 5m | 0.17 |
| Anglian Water | COTTENHAM-HISTON RD SP | Beach Ditch | 1 | 3 h 39m | 0.12 |
| Anglian Water | HADDENHAM-HILL ROW SP | Old West River | 2 | 2 h 42m | 0.08 |
| Anglian Water | PYMORE-STRAIGHT FURLONG SP | Littleport | 1 | 2 h 21m | 0.08 |
| Anglian Water | Ely Lisle Lane CSO | River Great Ouse | 1 | 1 h 49m | 0.04 |
| Anglian Water | BOTTISHAM STW | Swaffham Bulbeck Lode | 3 | 1 h 30m | 0.04 |
| Anglian Water | Ely Willow Walk Terminal Pumping Station | River Great Ouse | 1 | 1 h 29m | 0.04 |
| Anglian Water | LT DOWNHAM-CALIFORNIA SSO | Hundred Foot River | 3 | 1 h 28m | 0.04 |
| Anglian Water | LITTLE DOWNHAM-EAGLE LANE SP | Littleport | 2 | 0 h 59m | 0 |
| Anglian Water | BOTTISHAM-TUNBRIDGE LANE TPS | Swaffham Bulbeck Lode | 1 | 0 h 58m | 0 |
| Anglian Water | SOHAM-CHERRY TREE SP | Soham Lode | 1 | 0 h 12m | 0 |
| Anglian Water | LT DOWNHAM-CALIFORNIA SSO | Hundred Foot River | 1 | 0 h 12m | 0 |
| Anglian Water | LITTLEPORT-FRIARS WY WIS RD | Mare Fen Drain | 1 | 0 h 11m | 0 |
| Anglian Water | Witcham Road Terminal Pumping Station | Hundred Ft Drain | 0 | 0 h | 0 |
| Anglian Water | LITTLE DOWNHAM-EAGLE LANE SP | Littleport | 0 | 0 h | 0 |
| Anglian Water | BOTTISHAM-TUNBRIDGE LANE TPS | Swaffham Bulbeck Lode | 0 | 0 h | 0 |
| Anglian Water | HADDENHAM-HILL ROW SP | Old West River | 0 | 0 h | 0 |
| Anglian Water | STRETHAM STW | Stretham Catchwater River Grea | 0 | 0 h | 0 |
| Anglian Water | HADDENHAM-STATION ROAD SP | Grunty Fen Drain | 0 | 0 h | 0 |
| Anglian Water | WITCHAM-THE SLADE MH90 OVSSO | Counter Drain | 0 | 0 h | 0 |
| Anglian Water | WITCHAM WRC | Witcham Catchwater River Ouse | 0 | 0 h | 0 |
| Anglian Water | COVENEY-SCHOOL LANE SP | Un Sedge Fen Dr | 0 | 0 h | 0 |
| Anglian Water | BOTTISHAM STW | Swaffham Bulbeck Lode | 0 | 0 h | 0 |
| Anglian Water | Soham - Mill Corner TPS | Soham Lode | 0 | 0 h | 0 |
| Anglian Water | BURWELL STW | Catchwater Drain | 0 | 0 h | 0 |
| Anglian Water | PYMORE-STRAIGHT FURLONG SP | Littleport | 0 | 0 h | 0 |
| Anglian Water | LITTLEPORT-FRIARS WY WIS RD | Mare Fen Drain | 0 | 0 h | 0 |
| Anglian Water | LITTLE DOWNHAM PS | Pypers Hill Drain | 0 | 0 h | 0 |
| Anglian Water | CHIPPENHAM STW | River Kennett | 0 | 0 h | 0 |
| Anglian Water | FORDHAM-CARTER STREET OV | River Snall | 0 | 0 h | 0 |
| Anglian Water | HADDENHAM WRC | Aldreth Canal | 0 | 0 h | 0 |
| Anglian Water | BURWELL STW | Catchwater Drain | 0 | 0 h | 0 |
| Anglian Water | FORDHAM-CARTER STREET OV | River Snall | 0 | 0 h | 0 |
| Anglian Water | WENTWORTH-COLLEGE FARM SP | Folly River | 0 | 0 h | 0 |
| Anglian Water | HADDENHAM WRC | Aldreth Canal | 0 | 0 h | 0 |
| Anglian Water | WITCHAM WRC | Witcham Catchwater River Ouse | 0 | 0 h | 0 |
| Anglian Water | Chapel Terminal Pumping Station | Fen Drain River Great Ouse | 0 | 0 h | 0 |
| Anglian Water | Ely Willow Walk Terminal Pumping Station | River Great Ouse | 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.