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Polluted by sewage 15,671 hours in 2025 - That's 1.81 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 Forest of Dean, 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) |
|---|---|---|---|---|---|
| Severn Trent Water | LYDNEY STW (SSTO) | River Severn Estuary | 165 | 1,435 h 57m | 59.79 |
| Severn Trent Water | BLAKENEY (STW) | River Severn | 118 | 1,397 h 46m | 58.21 |
| Severn Trent Water | PITTS MILL STW (SSTO) | Glynch Brook | 68 | 1,343 h 20m | 55.96 |
| Severn Trent Water | LYDNEY - EAST MARSH (SSO) | Lyd | 77 | 911 h 44m | 37.96 |
| Severn Trent Water | LYDNEY STW (SSTO) | River Severn Estuary | 46 | 790 h | 32.92 |
| Dwr Cymru Welsh Water | St Briavels WwTW Storm Overflow | Wye Estuary | 95 | 721 h 57m | 30.04 |
| Severn Trent Water | BLAKENEY (STW) | River Severn | 39 | 689 h 15m | 28.71 |
| Severn Trent Water | BROADOAK STW (CSO) | River Severn | 64 | 653 h 16m | 27.21 |
| Severn Trent Water | PITTS MILL STW (SSTO) | Glynch Brook | 30 | 626 h 21m | 26.08 |
| Severn Trent Water | DYMOCK STW (CSO) | River Leadon | 28 | 609 h 25m | 25.38 |
| Severn Trent Water | CINDERFORD - CRUMPMEADOW STW (SSTO) | Cinderford Brook | 39 | 595 h 13m | 24.79 |
| Dwr Cymru Welsh Water | Newland WwTW Settled Storm Overflow | River Wye | 35 | 536 h | 22.33 |
| Severn Trent Water | ALVINGTON - ST ANNES WELL (CSO) | Cone Brook | 40 | 497 h 30m | 20.71 |
| Severn Trent Water | BROADOAK STW (CSO) | River Severn | 24 | 484 h 46m | 20.17 |
| Severn Trent Water | BLAKENEY STW STAGE X SPS (CSO) | River Severn | 58 | 341 h 9m | 14.21 |
| Dwr Cymru Welsh Water | Ruardean WwTW Storm Overflow | Unnamed Tribuatary of Lodgegrove Brook | 30 | 326 h 45m | 13.58 |
| Dwr Cymru Welsh Water | Sedbury Storm Overflow | River Wye Estuary | 50 | 289 h 30m | 12.04 |
| Severn Trent Water | LONGHOPE STW (SSTO) | Longhope Brook | 19 | 280 h 40m | 11.67 |
| Severn Trent Water | LONGHOPE STW (SSTO) | Longhope Brook | 22 | 269 h 58m | 11.21 |
| Severn Trent Water | LYDNEY - EAST MARSH (SSO) | Lyd | 15 | 259 h 31m | 10.79 |
| Severn Trent Water | OLDCROFT - OLD DAM ROAD (CSO) | Plummers Brook | 14 | 259 h 26m | 10.79 |
| Severn Trent Water | YORKLEY SLADE (CSO) | Plummer'S Brook | 15 | 255 h 15m | 10.62 |
| Severn Trent Water | OLDCROFT - OLD DAM ROAD (CSO) | Plummers Brook | 14 | 214 h 58m | 8.92 |
| Severn Trent Water | DYMOCK STW (CSO) | River Leadon | 9 | 172 h 3m | 7.17 |
| Severn Trent Water | ALVINGTON - ST ANNES WELL (CSO) | Cone Brook | 14 | 167 h 16m | 6.96 |
| Severn Trent Water | HARTPURY - WATERSMEET (CSO) | Colliers Brook | 11 | 160 h 11m | 6.67 |
| Severn Trent Water | WESTBURY-ON-SEVERN - CHURCH (CSO) | Westbury Brook | 16 | 150 h 17m | 6.25 |
| Severn Trent Water | BLAKENEY STW STAGE X SPS (CSO) | River Severn | 18 | 125 h 37m | 5.21 |
| Severn Trent Water | HARTPURY - WATERSMEET (CSO) | Colliers Brook | 9 | 105 h 53m | 4.38 |
| Dwr Cymru Welsh Water | Lydbrook WwTW Storm Overflow | River Wye | 13 | 94 h 45m | 3.92 |
| Severn Trent Water | RUSPIDGE - RAILWAY ROAD (CSO) | Cinderford Brook | 16 | 89 h 22m | 3.71 |
| Dwr Cymru Welsh Water | Joyford The Sinks Storm Overflow | Unnamed Brook | 7 | 84 h 15m | 3.5 |
| Dwr Cymru Welsh Water | Wyebank Road Storm Overflow | River Wye estuary | 26 | 82 h 52m | 3.42 |
| Severn Trent Water | WESTBURY-ON-SEVERN - CHURCH (CSO) | Westbury Brook | 10 | 68 h 32m | 2.83 |
| Severn Trent Water | NEWENT STW (SSTO) | Ell Brook | 13 | 60 h 27m | 2.5 |
| Dwr Cymru Welsh Water | Newland WwTW No.2 Storm Overflow | Valley Brook | 19 | 59 h 30m | 2.46 |
| Severn Trent Water | LYDNEY - CHURCH ROAD (CSO) | River Lyd | 41 | 54 h 54m | 2.25 |
| Severn Trent Water | BROADOAK (CSO) | River Severn | 7 | 49 h 52m | 2.04 |
| Severn Trent Water | LYDNEY - CHURCH ROAD (CSO) | River Lyd | 14 | 46 h 49m | 1.92 |
| Severn Trent Water | BROADOAK (CSO) | River Severn | 5 | 44 h 18m | 1.83 |
| Severn Trent Water | HUNTLEY - ORCHARD WAY (CSO) | River Leadon | 16 | 32 h 40m | 1.33 |
| Severn Trent Water | CINDERFORD - VALLEY ROAD (CSO) | Cinderford Brook | 9 | 29 h 27m | 1.21 |
| Severn Trent Water | NEWNHAM - LOWER HIGH STREET PS (CSO) | River Severn | 11 | 18 h 18m | 0.75 |
| Severn Trent Water | NEWENT STW (SSTO) | Ell Brook | 4 | 18 h 10m | 0.75 |
| Severn Trent Water | CINDERFORD - CRUMPMEADOW STW (SSTO) | Cinderford Brook | 2 | 17 h 39m | 0.71 |
| Severn Trent Water | HUNTLEY - ORCHARD WAY (CSO) | River Leadon | 7 | 15 h 38m | 0.62 |
| Severn Trent Water | KEMPLEY - FISHPOOL (SSO) | River Alne | 3 | 15 h 23m | 0.62 |
| Severn Trent Water | KEMPLEY - FISHPOOL (SSO) | River Alne | 2 | 15 h 19m | 0.62 |
| Severn Trent Water | LYDNEY - TUTNALLS ST/HAMS RD (CSO) | River Roden | 7 | 14 h 36m | 0.58 |
| Severn Trent Water | CINDERFORD - VALLEY ROAD (CSO) | Cinderford Brook | 5 | 11 h 9m | 0.46 |
| Severn Trent Water | SOUDLEY - NR TRAMWAY ROAD (SSO) | Cinderford Brook | 2 | 10 h 30m | 0.42 |
| Severn Trent Water | LYDNEY - TUTNALLS ST/HAMS RD (CSO) | River Roden | 4 | 10 h 9m | 0.42 |
| Severn Trent Water | BLAKENEY STW STAGE 1 SPS (CSO) | River Severn | 2 | 9 h 37m | 0.38 |
| Severn Trent Water | CINDERFORD - GREENWAY ROAD (CSO) | Cinderford Brook | 2 | 9 h 31m | 0.38 |
| Dwr Cymru Welsh Water | Newland WwTW No1 Storm Overflow | Valley Brook | 3 | 9 h 15m | 0.38 |
| Severn Trent Water | NEWENT - CLEEVE MILL LANE (CSO) | Ell Brook | 5 | 8 h 18m | 0.33 |
| Dwr Cymru Welsh Water | Speech House Road Broadwell Overflow | Cannop Brook | 3 | 6 h 30m | 0.25 |
| Severn Trent Water | NEWENT - THE CROFT (CSO) | Peacocks Brook | 5 | 2 h 17m | 0.08 |
| Dwr Cymru Welsh Water | Lydbrook Storm Overflow | Tributary of the River Wye | 2 | 2 h 15m | 0.08 |
| Severn Trent Water | SOUDLEY - NR TRAMWAY ROAD (SSO) | Cinderford Brook | 1 | 2 h 7m | 0.08 |
| Severn Trent Water | MITCHELDEAN - VANTAGE POINT BV (CSO) | Longhope Brook | 3 | 1 h 57m | 0.04 |
| Severn Trent Water | NEWNHAM - LOWER HIGH STREET PS (CSO) | River Severn | 3 | 1 h 45m | 0.04 |
| Severn Trent Water | BLAKENEY STW STAGE 1 SPS (CSO) | River Severn | 1 | 1 h 21m | 0.04 |
| Dwr Cymru Welsh Water | Lydbrook Overflow | River Wye | 1 | 0 h 30m | 0 |
| Severn Trent Water | MITCHELDEAN - VANTAGE POINT BV (CSO) | Longhope Brook | 1 | 0 h 14m | 0 |
| Severn Trent Water | ELLWOOD - HOLLY LANE (SSO) | Dry Brook | 0 | 0 h | 0 |
| Severn Trent Water | NEWENT - CLEEVE MILL LANE (CSO) | Ell Brook | 0 | 0 h | 0 |
| Severn Trent Water | CHURCHAM (CSO) | Ley Brook | 0 | 0 h | 0 |
| Severn Trent Water | LITTLE DRYBROOK (CSO) | Dry Brook | 0 | 0 h | 0 |
| Severn Trent Water | ELLWOOD - HOLLY LANE (SSO) | Dry Brook | 0 | 0 h | 0 |
| Severn Trent Water | MAISEMORE - GLOUCESTER ROAD (CSO) | Ullesthorpe Brook | 0 | 0 h | 0 |
| Severn Trent Water | LITTLE DRYBROOK (CSO) | Dry Brook | 0 | 0 h | 0 |
| Severn Trent Water | CINDERFORD - GREENWAY ROAD (CSO) | Cinderford Brook | 0 | 0 h | 0 |
| Severn Trent Water | LITTLEDEAN STW (SSTO) | Westbury Brook | 0 | 0 h | 0 |
| Severn Trent Water | MAISEMORE - GLOUCESTER ROAD (CSO) | Ullesthorpe Brook | 0 | 0 h | 0 |
| Severn Trent Water | RUSPIDGE - RAILWAY ROAD (CSO) | Cinderford Brook | 0 | 0 h | 0 |
| Severn Trent Water | NEWENT - THE CROFT (CSO) | Peacocks Brook | 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