Polluted by sewage 25,667 hours in 2025 - That's 2.97 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 Glastonbury and Somerton, 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) |
|---|---|---|---|---|---|
| Wessex Water | Unknown | Unknown | 89 | 1,929 h 7m | 80.38 |
| Wessex Water | MONTACUTE NR OLD STW | Wellahms Brook | 55 | 1,014 h 10m | 42.25 |
| Wessex Water | HUISH EPISCOPI PIBSBURY | Long Sutton Catchwater | 33 | 722 h 12m | 30.08 |
| Wessex Water | HUISH EPISCOPI PIBSBURY | Long Sutton Catchwater | 26 | 602 h 31m | 25.08 |
| Wessex Water | LONG SUTTON BENNETTS ORCHARD | Crouds Lake | 30 | 587 h 48m | 24.46 |
| Wessex Water | SOMERTON BARPOOL LANE STORM TANK | River Cary | 29 | 587 h 24m | 24.46 |
| Wessex Water | CHARLTON MACKERELL ROOKERY FARM | Bull Brook | 29 | 580 h 26m | 24.17 |
| Wessex Water | BUTLEIGH STORM TANK | River Brue | 32 | 575 h 41m | 23.96 |
| Wessex Water | CHARLTON MUSGROVE BARROW LANE | River Cale | 35 | 566 h 26m | 23.58 |
| Wessex Water | FIVEHEAD STORM TANK | River Isle | 29 | 564 h 20m | 23.5 |
| Wessex Water | SOMERTON BARPOOL LANE STORM TANK | River Cary | 27 | 558 h 29m | 23.25 |
| Wessex Water | BUTLEIGH STORM TANK | River Brue | 35 | 493 h | 20.54 |
| Wessex Water | KINGSDON | Park Brook | 22 | 468 h 34m | 19.5 |
| Wessex Water | MARSTON MAGNA CHURCH LANE | River Yeo | 22 | 447 h 38m | 18.62 |
| Wessex Water | Unknown | Unknown | 43 | 445 h 59m | 18.54 |
| Wessex Water | LIMINGTON MAIN | River Yeo | 26 | 445 h 37m | 18.54 |
| Wessex Water | KINGSDON | Park Brook | 21 | 437 h 38m | 18.21 |
| Wessex Water | CHARLTON MACKERELL ROOKERY FARM | Bull Brook | 21 | 434 h | 18.08 |
| Wessex Water | BALTONSBOROUGH MAIN 1 | Mill Stream | 29 | 412 h 5m | 17.17 |
| Wessex Water | LONG SUTTON BENNETTS ORCHARD | Crouds Lake | 21 | 392 h 18m | 16.33 |
| Wessex Water | CHARLTON MUSGROVE BARROW LANE | River Cale | 29 | 373 h 56m | 15.54 |
| Wessex Water | Unknown | Unknown | 29 | 372 h 43m | 15.5 |
| Wessex Water | BARTON ST DAVID TOOTLE BRIDGE | Cunlease Rhyne | 24 | 366 h 45m | 15.25 |
| Wessex Water | SPARKFORD OFF SPARKFORD HILL LANE INLET | River Cam | 50 | 357 h 24m | 14.88 |
| Wessex Water | GLASTONBURY THE BECKERY STORM TANK | Glast Mill Stream | 22 | 324 h 23m | 13.5 |
| Wessex Water | WEST CAMEL | River Cam | 15 | 314 h 10m | 13.08 |
| Wessex Water | YEOVIL WITHOUT OFF STONE LANE STORM TANK | Bearley Brook | 22 | 312 h 10m | 13 |
| Wessex Water | ILCHESTER PILL BRIDGE LANE STORM TANK | River Yeo | 23 | 310 h 4m | 12.92 |
| Wessex Water | FIVEHEAD STORM TANK | River Isle | 17 | 309 h 4m | 12.88 |
| Wessex Water | MONTACUTE NR OLD STW | Wellahms Brook | 24 | 301 h 54m | 12.54 |
| Wessex Water | TINTINHULL ASH BEARLEY LANE STORM TANK | Witcombe Bottom Drain | 22 | 300 h 31m | 12.5 |
| Wessex Water | BARTON ST DAVID TOOTLE BRIDGE | Cunlease Rhyne | 18 | 299 h 59m | 12.46 |
| Wessex Water | NORTH CADBURY RIDGEWAY LANE STORM TANK | River Cam | 23 | 299 h 49m | 12.46 |
| Wessex Water | WEST CAMEL | River Cam | 17 | 299 h 32m | 12.46 |
| Wessex Water | GLASTONBURY THE BECKERY STORM TANK | Glast Mill Stream | 25 | 299 h 14m | 12.46 |
| Wessex Water | SANDFORD ORCAS | River Yeo | 19 | 297 h 34m | 12.38 |
| Wessex Water | Unknown | Unknown | 27 | 282 h 8m | 11.75 |
| Wessex Water | CHARLTON ADAM | River Cary | 17 | 258 h 35m | 10.75 |
| Wessex Water | PITNEY | Low Ham Rhyne | 16 | 257 h 4m | 10.71 |
| Wessex Water | MILBORNE PORT VENN FARM STORM TANK | Henover Brook | 13 | 245 h 6m | 10.21 |
| Wessex Water | MARTOCK HURST BOW STORM TANK | Parrett And Hinton Meads Brook | 22 | 243 h 44m | 10.12 |
| Wessex Water | CASTLE CARY NEAR DIMMER STORM TANK | River Cary | 16 | 240 h 41m | 10 |
| Wessex Water | PITNEY | Low Ham Rhyne | 18 | 226 h 24m | 9.42 |
| Wessex Water | NORTON SUB HAMDON | River Parrett | 19 | 225 h 41m | 9.38 |
| Wessex Water | YEOVIL WITHOUT OFF STONE LANE STORM TANK | Bearley Brook | 19 | 220 h 38m | 9.17 |
| Wessex Water | MARSTON MAGNA CHURCH LANE | River Yeo | 13 | 202 h 58m | 8.42 |
| Wessex Water | Unknown | Unknown | 13 | 199 h 51m | 8.29 |
| Wessex Water | ILCHESTER PILL BRIDGE LANE STORM TANK | River Yeo | 12 | 196 h 36m | 8.17 |
| Wessex Water | NORTON SUB HAMDON | River Parrett | 17 | 189 h 33m | 7.88 |
| Wessex Water | KINGSBURY EPISCOPI | River Parrett | 12 | 182 h 10m | 7.58 |
| Wessex Water | KEINTON MANDEVILLE | River Carey | 12 | 175 h 52m | 7.29 |
| Wessex Water | TEMPLECOMBE STORM TANK | Bow Brook | 17 | 172 h 48m | 7.17 |
| Wessex Water | WINCANTON STORM TANK | River Cale | 19 | 163 h 58m | 6.79 |
| Wessex Water | ILTON ASHFORD FARM (NEAR) INLET | River Isle | 19 | 160 h 57m | 6.67 |
| Wessex Water | CHARLTON HORETHORNE MOUNT LANE STORM TANK | Bromers Brook | 14 | 159 h 42m | 6.62 |
| Wessex Water | LONG SUTTON KNOLE | Of Kings Moor Main Drain | 9 | 159 h 1m | 6.62 |
| Wessex Water | ILTON ASHFORD FARM (NEAR) INLET | River Isle | 20 | 154 h 47m | 6.42 |
| Wessex Water | MARTOCK HURST BOW STORM TANK | Parrett And Hinton Meads Brook | 17 | 148 h 36m | 6.17 |
| Wessex Water | ILTON FROST LANE | Cad Brook | 15 | 145 h | 6.04 |
| Wessex Water | BARTON ST DAVID | Barton Brook | 10 | 143 h 48m | 5.96 |
| Wessex Water | Unknown | Unknown | 9 | 142 h 45m | 5.92 |
| Wessex Water | SPARKFORD OFF SPARKFORD HILL LANE INLET | River Cam | 20 | 141 h 47m | 5.88 |
| Wessex Water | SANDFORD ORCAS | River Yeo | 13 | 139 h 53m | 5.79 |
| Wessex Water | BARTON ST DAVID | Barton Brook | 13 | 139 h 48m | 5.79 |
| Wessex Water | CHILTHORNE DOMER OFF VAGG LANE INLET | Bearley Brook | 21 | 136 h 23m | 5.67 |
| Wessex Water | LOWER SOMERTON | Millstream | 7 | 117 h 21m | 4.88 |
| Wessex Water | TEMPLECOMBE STORM TANK | Bow Brook | 15 | 115 h 27m | 4.79 |
| Wessex Water | MILBORNE PORT VENN FARM STORM TANK | Henover Brook | 8 | 114 h 42m | 4.75 |
| Wessex Water | HENSTRIDGE MARSH LANE (HENSTRIDGE NO X) | River Cale | 10 | 113 h 46m | 4.71 |
| Wessex Water | BRUTON GANTS MILL LANE STORM TANK | River Brue | 7 | 101 h 16m | 4.21 |
| Wessex Water | WINCANTON STORM TANK | River Cale | 13 | 93 h 8m | 3.88 |
| Wessex Water | UPTON NR LANGPORT | Long Sutton Main Drain | 10 | 91 h 22m | 3.79 |
| Wessex Water | ILTON FROST LANE | Cad Brook | 5 | 89 h 15m | 3.71 |
| Wessex Water | STREET MAIN | South Drain | 17 | 88 h 36m | 3.67 |
| Wessex Water | YEOVIL WITHOUT OFF STONE LANE INLET | Bearley Brook | 21 | 76 h 19m | 3.17 |
| Wessex Water | ILCHESTER MAIN | River Yeo | 6 | 76 h | 3.17 |
| Wessex Water | KINGSBURY EPISCOPI | River Parrett | 8 | 73 h 8m | 3.04 |
| Wessex Water | KEINTON MANDEVILLE | River Carey | 8 | 72 h 53m | 3 |
| Wessex Water | YEOVIL WITHOUT OFF STONE LANE INLET | Bearley Brook | 12 | 69 h 20m | 2.88 |
| Wessex Water | ALFORD INLET | River Brue | 7 | 68 h 35m | 2.83 |
| Wessex Water | CHILTHORNE DOMER OFF VAGG LANE INLET | Bearley Brook | 13 | 64 h 36m | 2.67 |
| Wessex Water | YEOVILTON WEIR | River Yeo | 11 | 64 h 30m | 2.67 |
| Wessex Water | HENSTRIDGE MARSH LANE (HENSTRIDGE NO X) | River Cale | 7 | 61 h 22m | 2.54 |
| Wessex Water | HUISH EPISCOPI WAGG BRIDGE | Wagg Rhyne | 4 | 59 h 36m | 2.46 |
| Wessex Water | YEOVILTON WEIR | River Yeo | 4 | 59 h 35m | 2.46 |
| Wessex Water | CURRY RIVEL CURRY RIVEL STORM O/F | Drayton Drain | 7 | 57 h 44m | 2.38 |
| Wessex Water | COAT CRIPPLE STREET (OLD STW SITE) | River Parrett | 11 | 57 h 39m | 2.38 |
| Wessex Water | BALTONSBOROUGH ORCHARD LEIGH | Mill Stream | 7 | 48 h 26m | 2 |
| Wessex Water | DRAYTON DUCKS LANE | Drayton Drain | 6 | 43 h 49m | 1.79 |
| Wessex Water | YEOVIL MUDFORD | River Yeo | 4 | 41 h 33m | 1.71 |
| Wessex Water | GLASTONBURY PORCHESTALL | River Brue Mill Stream | 8 | 40 h 44m | 1.67 |
| Wessex Water | STREET MAIN | South Drain | 9 | 40 h 22m | 1.67 |
| Wessex Water | GLASTONBURY PORCHESTALL | River Brue Mill Stream | 12 | 39 h 46m | 1.62 |
| Wessex Water | LONG SUTTON KNOLE | Of Kings Moor Main Drain | 5 | 36 h 44m | 1.5 |
| Wessex Water | YEOVIL MUDFORD | River Yeo | 7 | 35 h 8m | 1.46 |
| Wessex Water | CURRY RIVEL CURRY RIVEL STORM O/F | Drayton Drain | 3 | 34 h 56m | 1.42 |
| Wessex Water | CASTLE CARY NEAR DIMMER STORM TANK | River Cary | 6 | 34 h 4m | 1.42 |
| Wessex Water | GLASTONBURY NORTH LOAD BRIDGE | Glastonbury Mill Stream | 4 | 33 h 54m | 1.38 |
| Wessex Water | TINTINHULL ASH BEARLEY LANE STORM TANK | Witcombe Bottom Drain | 5 | 32 h 16m | 1.33 |
| Wessex Water | ALLER | Oxleasedrove Rhyne East | 7 | 30 h 42m | 1.25 |
| Wessex Water | NORTH CADBURY RIDGEWAY LANE STORM TANK | River Cam | 15 | 30 h 35m | 1.25 |
| Wessex Water | WINCANTON MOOR LANE | River Cale Via Sws | 7 | 24 h 28m | 1 |
| Wessex Water | HUISH EPISCOPI WAGG BRIDGE | Wagg Rhyne | 3 | 24 h 28m | 1 |
| Wessex Water | LIMINGTON MAIN | River Yeo | 8 | 24 h 4m | 1 |
| Wessex Water | MARTOCK HURST BOW INLET | Parrett And Hinton Meads Brook | 5 | 23 h 2m | 0.96 |
| Wessex Water | BALTONSBOROUGH ORCHARD LEIGH | Mill Stream | 4 | 22 h 32m | 0.92 |
| Wessex Water | GLASTONBURY NORTH LOAD BRIDGE | Glastonbury Mill Stream | 11 | 20 h 38m | 0.83 |
| Wessex Water | MARTOCK HURST BOW INLET | Parrett And Hinton Meads Brook | 6 | 20 h 33m | 0.83 |
| Wessex Water | COAT CRIPPLE STREET (OLD STW SITE) | River Parrett | 8 | 19 h 11m | 0.79 |
| Wessex Water | CHARLTON HORETHORNE MOUNT LANE STORM TANK | Bromers Brook | 4 | 17 h 50m | 0.71 |
| Wessex Water | STOKE SUB HAMDON QUEENS CRESCENT R/O (OS 5300) | Wellhams Brook | 16 | 17 h 24m | 0.71 |
| Wessex Water | CHARLTON ADAM | River Cary | 7 | 17 h | 0.71 |
| Wessex Water | QUEEN CAMEL ENGLANDS MEAD GREEN LANE | River Cam | 3 | 16 h 56m | 0.67 |
| Wessex Water | GLASTONBURY WELLS ROAD | Rivr Sheppey | 4 | 16 h 36m | 0.67 |
| Wessex Water | ALFORD INLET | River Brue | 2 | 15 h | 0.62 |
| Wessex Water | QUEEN CAMEL MILDMAY PLACE IN THE REAR GARDEN OF MILDMAY ORCHARD | River Cam | 4 | 13 h 2m | 0.54 |
| Wessex Water | WINCANTON BENNET FIELD | River Cale | 13 | 12 h 54m | 0.5 |
| Wessex Water | GLASTONBURY WELLS ROAD | Rivr Sheppey | 5 | 12 h 28m | 0.5 |
| Wessex Water | WINCANTON MOOR LANE | River Cale Via Sws | 2 | 12 h 22m | 0.5 |
| Wessex Water | LANGPORT SOMERTON ROAD | Northstreet Moor Rhyne Via Sws | 11 | 12 h 12m | 0.5 |
| Wessex Water | LANGPORT SOMERTON ROAD | Northstreet Moor Rhyne Via Sws | 11 | 12 h 6m | 0.5 |
| Wessex Water | MARTOCK HURST NO XX | Hinton Meads Brook | 10 | 10 h 40m | 0.42 |
| Wessex Water | BRUTON GANTS MILL LANE STORM TANK | River Brue | 2 | 9 h 40m | 0.38 |
| Wessex Water | STOKE SUB HAMDON QUEENS CRESCENT R/O (OS 5300) | Wellhams Brook | 10 | 8 h 58m | 0.33 |
| Wessex Water | GLASTONBURY EDGARLEY MILLFIELD SCHOOL | Upper River Brue | 3 | 8 h 57m | 0.33 |
| Wessex Water | STREET FARM LANE | South Drain | 6 | 8 h 25m | 0.33 |
| Wessex Water | STOKE SUB HAMDON WINDSOR LANE | Wellhams Brook | 7 | 8 h | 0.33 |
| Wessex Water | TEMPLECOMBE ROYAL HOTEL | Bow Brook | 5 | 7 h 54m | 0.29 |
| Wessex Water | STREET FARM LANE | South Drain | 4 | 6 h 56m | 0.25 |
| Wessex Water | QUEEN CAMEL MILDMAY PLACE IN THE REAR GARDEN OF MILDMAY ORCHARD | River Cam | 3 | 6 h 48m | 0.25 |
| Wessex Water | WINCANTON BENNET FIELD | River Cale | 4 | 6 h 38m | 0.25 |
| Wessex Water | ALLER | Oxleasedrove Rhyne East | 3 | 5 h 34m | 0.21 |
| Wessex Water | TEMPLECOMBE ROYAL HOTEL | Bow Brook | 4 | 5 h 30m | 0.21 |
| Wessex Water | STREET MIDDLE BROOKS ROAD | Unknown | 1 | 5 h 20m | 0.21 |
| Wessex Water | STREET HOUNDWOOD DROVE | Bullmead Ditch | 3 | 4 h 40m | 0.17 |
| Wessex Water | STREET MIDDLE BROOKS ROAD | Unknown | 4 | 3 h 53m | 0.12 |
| Wessex Water | UPTON NR LANGPORT | Long Sutton Main Drain | 1 | 3 h 52m | 0.12 |
| Wessex Water | STOKE SUB HAMDON NORTH STREET O/S NO XX | Wellhams Brook | 9 | 3 h 34m | 0.12 |
| Wessex Water | MARTOCK HURST NO XX | Hinton Meads Brook | 3 | 3 h 30m | 0.12 |
| Wessex Water | WINCANTON BAYFORD | River Cale | 3 | 3 h 4m | 0.12 |
| Wessex Water | GLASTONBURY MANOR HOUSE ROAD O/S TELEPHONE EXCHANGE | Glastonbury Millstream | 5 | 2 h 52m | 0.08 |
| Wessex Water | MARTOCK CHURCH HOUSE WATER STREET | Mill Brook | 1 | 2 h 18m | 0.08 |
| Wessex Water | STREET FORD STREAM ROAD | Bullmead Ditch | 5 | 2 h 12m | 0.08 |
| Wessex Water | STREET GLASTON ROAD OPP XX | South Drain | 2 | 2 h 9m | 0.08 |
| Wessex Water | STREET HOUNDWOOD DROVE | Bullmead Ditch | 1 | 1 h 58m | 0.04 |
| Wessex Water | GLASTONBURY ACTIS | River Brue | 3 | 1 h 28m | 0.04 |
| Wessex Water | STOKE SUB HAMDON NORTH STREET O/S NO XX | Wellhams Brook | 4 | 1 h 22m | 0.04 |
| Wessex Water | SOUTH CADBURY | River Cam | 2 | 1 h 17m | 0.04 |
| Wessex Water | STREET GLASTON ROAD OPP XX | South Drain | 2 | 1 h 10m | 0.04 |
| Wessex Water | MUDFORD TRENT VIEW IN F/G (A359) | River Yeo | 1 | 0 h 56m | 0 |
| Wessex Water | GLASTONBURY EDGARLEY MILLFIELD SCHOOL | Upper River Brue | 1 | 0 h 53m | 0 |
| Wessex Water | GLASTONBURY MANOR HOUSE ROAD O/S TELEPHONE EXCHANGE | Glastonbury Millstream | 2 | 0 h 46m | 0 |
| Wessex Water | GLASTONBURY ACTIS | River Brue | 1 | 0 h 34m | 0 |
| Wessex Water | BALTONSBOROUGH MAIN X | Mill Stream | 1 | 0 h 30m | 0 |
| Wessex Water | WINCANTON BAYFORD | River Cale | 1 | 0 h 27m | 0 |
| Wessex Water | STREET STRODE ROAD ALLOTMENTS | Old Rhyne Via Sws | 1 | 0 h 14m | 0 |
| Wessex Water | STREET FORD STREAM ROAD | Bullmead Ditch | 1 | 0 h 4m | 0 |
| Wessex Water | PENSELWOOD PENN MILL | River Stour | 0 | 0 h | 0 |
| Wessex Water | HUISH EPISCOPI WAGG DROVE | Wagg Drove Rhyne | 0 | 0 h | 0 |
| Wessex Water | Unknown | Unknown | 0 | 0 h | 0 |
| Wessex Water | MARTOCK CHURCH HOUSE WATER STREET | Mill Brook | 0 | 0 h | 0 |
| Wessex Water | TEMPLECOMBE SLADES HILL | Bow Brook | 0 | 0 h | 0 |
| Wessex Water | Unknown | Unknown | 0 | 0 h | 0 |
| Wessex Water | DRAYTON DUCKS LANE | Drayton Drain | 0 | 0 h | 0 |
| Wessex Water | SOMERTON NEW HILL NR XX | River Cary | 0 | 0 h | 0 |
| Wessex Water | Unknown | Unknown | 0 | 0 h | 0 |
| Wessex Water | STOKE SUB HAMDON WINDSOR LANE | Wellhams Brook | 0 | 0 h | 0 |
| Wessex Water | MUDFORD TRENT VIEW IN F/G (A359) | River Yeo | 0 | 0 h | 0 |
| Wessex Water | PENSELWOOD PENN MILL | River Stour | 0 | 0 h | 0 |
| Wessex Water | GLASTONBURY WIRRAL PARK | Glastonbury Mill Stream | 0 | 0 h | 0 |
| Wessex Water | STREET STRODE ROAD ALLOTMENTS | Old Rhyne Via Sws | 0 | 0 h | 0 |
| Wessex Water | SOUTH CADBURY | River Cam | 0 | 0 h | 0 |
| Wessex Water | QUEEN CAMEL ENGLANDS MEAD GREEN LANE | River Cam | 0 | 0 h | 0 |
| Wessex Water | BALTONSBOROUGH MAIN X | Mill Stream | 0 | 0 h | 0 |
| Wessex Water | ILCHESTER MAIN | River Yeo | 0 | 0 h | 0 |
| Wessex Water | GLASTONBURY WIRRAL PARK | Glastonbury Mill Stream | 0 | 0 h | 0 |
| Wessex Water | HUISH EPISCOPI WAGG DROVE | Wagg Drove Rhyne | 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.