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Polluted by sewage 1,964 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 Preston, 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) |
|---|---|---|---|---|---|
| United Utilities | Savick Brook PS (339CT) | Savick Brook | 31 | 230 h 26m | 9.58 |
| United Utilities | Manor House Lane CSO | Eaves Bk, Savick Bk | 23 | 224 h 55m | 9.33 |
| United Utilities | Marsh Lane CSO | River Ribble Via Chain Culvert | 59 | 169 h 49m | 7.04 |
| United Utilities | GEORGE STREET CSO | River Ribble | 59 | 135 h 48m | 5.62 |
| United Utilities | Blackpool Road CSO | River Ribble | 51 | 126 h 46m | 5.25 |
| United Utilities | Victoria Road CSO | Gilda Brook Via Sws | 46 | 115 h 56m | 4.79 |
| United Utilities | Cattle Market CSO | Eaves Bk, Savick Bk | 13 | 113 h 28m | 4.71 |
| United Utilities | Bank Parade CSO | River Ribble | 35 | 111 h 28m | 4.62 |
| United Utilities | Lea Gate PS | Savick Bk, Ribble Est | 19 | 107 h 23m | 4.46 |
| United Utilities | Ribbleton Lane CSO | River Ribble Tidal Via Sws | 11 | 81 h 18m | 3.38 |
| United Utilities | HOLME ROAD CSO | Holme Beck Via Sws | 42 | 73 h 42m | 3.04 |
| United Utilities | Savick Brook PS (339CT) | Savick Brook | 11 | 66 h 10m | 2.75 |
| United Utilities | Albyn Street East CSO | Swillbrook Clvrt R Ribble | 7 | 55 h 2m | 2.29 |
| United Utilities | Wolseley Road CSO | River Ribble | 3 | 37 h 45m | 1.54 |
| United Utilities | THORNPARK PS | Rvr Ribble | 12 | 33 h 5m | 1.38 |
| United Utilities | Watling Street Road CSO | Eaves Brook Savick Brook | 4 | 29 h 31m | 1.21 |
| United Utilities | HOLME ROAD CSO | Holme Beck Via Sws | 12 | 27 h 26m | 1.12 |
| United Utilities | GEORGE STREET CSO | River Ribble | 12 | 27 h 20m | 1.12 |
| United Utilities | Victoria Road CSO | Gilda Brook Via Sws | 12 | 24 h 34m | 1 |
| United Utilities | Bank Parade CSO | River Ribble | 9 | 18 h | 0.75 |
| United Utilities | Lea Gate PS | Savick Bk, Ribble Est | 3 | 15 h 54m | 0.62 |
| United Utilities | Powis Road CSO | Chain Caul Culvert | 3 | 14 h 54m | 0.58 |
| United Utilities | Watery Lane/Douglas Street CSO | Chain Caul Ward Storm | 4 | 14 h 41m | 0.58 |
| United Utilities | Watery Lane PS CSO | Sutton Brook | 2 | 14 h 8m | 0.58 |
| United Utilities | Fishergate Hill CSO | River Ribble | 3 | 13 h 26m | 0.54 |
| United Utilities | Blackpool Road CSO | River Ribble | 11 | 13 h 24m | 0.54 |
| United Utilities | Manor House Lane CSO | Eaves Bk, Savick Bk | 2 | 11 h 38m | 0.46 |
| United Utilities | Fishergate Hill CSO | River Ribble | 2 | 9 h 34m | 0.38 |
| United Utilities | West Strand CSO | Chain Caul Culvert Into Ribble | 16 | 6 h 58m | 0.25 |
| United Utilities | Fishergate Hill CSO | River Ribble | 1 | 6 h 54m | 0.25 |
| United Utilities | Fishergate Hill CSO | River Ribble | 3 | 6 h 16m | 0.25 |
| United Utilities | Watery Lane CSO | Chain Caul Storm Culvert | 2 | 4 h 54m | 0.17 |
| United Utilities | 2 Mill Lane CSO | Savick Brook Via Sws | 5 | 4 h 20m | 0.17 |
| United Utilities | Banksfield Avenue CSO | Savick Brk Ribble Est | 6 | 3 h 51m | 0.12 |
| United Utilities | St George's Road CSO | Moore Brook Culvert | 7 | 3 h 22m | 0.12 |
| United Utilities | Frenchwood Knoll CSO | Swillbrook Culvert | 9 | 2 h 48m | 0.08 |
| United Utilities | 208 Deepdale Road CSO | Moor Brook Culvert | 6 | 1 h 56m | 0.04 |
| United Utilities | Watery Lane CSO (Shaft C1) | Moorbrook Culvert -> River Ribble | 1 | 1 h 2m | 0.04 |
| United Utilities | Old Lancaster Lane CSO | Culverted Section Of Moor Brook, River Ribble | 5 | 1 h 2m | 0.04 |
| United Utilities | Old Lancaster Lane CSO | Culverted Section Of Moor Brook, River Ribble | 2 | 1 h | 0.04 |
| United Utilities | MOORBROOK STREET CSO | Clvrt Moor Brook Rvr Ribb | 3 | 0 h 40m | 0 |
| United Utilities | St Paul's Road combined sewer overflow (332TX) (PRE0006) | Mersey Estuary | 2 | 0 h 40m | 0 |
| United Utilities | Hawthorn Crescent CSO | River Ribble | 3 | 0 h 36m | 0 |
| United Utilities | Lightfoot Lane PS | Unamed Woodplumpton Brook | 1 | 0 h 24m | 0 |
| United Utilities | Halsbury Street CSO | Swill Brook Clvrt River Ribble | 2 | 0 h 18m | 0 |
| United Utilities | Frenchwood Knoll CSO | Swillbrook Culvert | 1 | 0 h 12m | 0 |
| United Utilities | Wolseley Road CSO | River Ribble | 0 | 0 h | 0 |
| United Utilities | Powis Road CSO | Chain Caul Culvert | 0 | 0 h | 0 |
| United Utilities | Percy Street CSO | Storm Culvert, Ribble | 0 | 0 h | 0 |
| United Utilities | Banksfield Avenue CSO | Savick Brk Ribble Est | 0 | 0 h | 0 |
| United Utilities | Haslam Park North and South Combined Sewer Overflow (Site ID 33026) (PRE0090) | Savick Brook | 0 | 0 h | 0 |
| United Utilities | THORNPARK PS | Rvr Ribble | 0 | 0 h | 0 |
| United Utilities | Lightfoot Lane PS | Unamed Woodplumpton Brook | 0 | 0 h | 0 |
| United Utilities | 18 Deepdale Road CSO | River Ribble Via Storm Culvert | 0 | 0 h | 0 |
| United Utilities | Halsbury Street CSO | Swill Brook Clvrt River Ribble | 0 | 0 h | 0 |
| United Utilities | London Road CSO | Storm Culvert Into R Ribble | 0 | 0 h | 0 |
| United Utilities | West Strand CSO | Chain Caul Culvert Into Ribble | 0 | 0 h | 0 |
| United Utilities | Cattle Market CSO | Eaves Bk, Savick Bk | 0 | 0 h | 0 |
| United Utilities | Watery Lane PS CSO | Sutton Brook | 0 | 0 h | 0 |
| United Utilities | Dale Street CSO | River Ribble Tidal | 0 | 0 h | 0 |
| United Utilities | St Paul's Road combined sewer overflow (332TX) (PRE0006) | Mersey Estuary | 0 | 0 h | 0 |
| United Utilities | Ribbleton Lane CSO | River Ribble Tidal Via Sws | 0 | 0 h | 0 |
| United Utilities | Percy Street CSO | Storm Culvert, Ribble | 0 | 0 h | 0 |
| United Utilities | Haslam Park North and South Combined Sewer Overflow (Site ID 33026) (PRE0090) | Savick Brook | 0 | 0 h | 0 |
| United Utilities | 75 LOWER BANK ROAD CSO | Eaves Brook | 0 | 0 h | 0 |
| United Utilities | 2 Mill Lane CSO | Savick Brook Via Sws | 0 | 0 h | 0 |
| United Utilities | London Road CSO | Storm Culvert Into R Ribble | 0 | 0 h | 0 |
| United Utilities | Manchester Road/Selbourne Road CSO | River Ribble | 0 | 0 h | 0 |
| United Utilities | London Road (Preston) CSO (332C8) | Savick Brook | 0 | 0 h | 0 |
| United Utilities | London Road (Preston) CSO (332C8) | Savick Brook | 0 | 0 h | 0 |
| United Utilities | MOORBROOK STREET CSO | Clvrt Moor Brook Rvr Ribb | 0 | 0 h | 0 |
| United Utilities | 18 Deepdale Road CSO | River Ribble Via Storm Culvert | 0 | 0 h | 0 |
| United Utilities | Hawthorn Crescent CSO | River Ribble | 0 | 0 h | 0 |
| United Utilities | Manchester Road/Selbourne Road CSO | River Ribble | 0 | 0 h | 0 |
| United Utilities | St George's Road CSO | Moore Brook Culvert | 0 | 0 h | 0 |
| United Utilities | 208 Deepdale Road CSO | Moor Brook Culvert | 0 | 0 h | 0 |
| United Utilities | Watling Street Road CSO | Eaves Brook Savick Brook | 0 | 0 h | 0 |
| United Utilities | Watery Lane CSO (Shaft C1) | Moorbrook Culvert -> River Ribble | 0 | 0 h | 0 |
| United Utilities | Albyn Street East CSO | Swillbrook Clvrt R Ribble | 0 | 0 h | 0 |
| United Utilities | Marsh Lane CSO | River Ribble Via Chain Culvert | 0 | 0 h | 0 |
| United Utilities | Watery Lane CSO | Chain Caul Storm Culvert | 0 | 0 h | 0 |
| United Utilities | Haslam Park North and South Combined Sewer Overflow (Site ID 33026) (PRE0090) | Savick Brook | 0 | 0 h | 0 |
| United Utilities | 75 LOWER BANK ROAD CSO | Eaves Brook | 0 | 0 h | 0 |
| United Utilities | Watery Lane/Douglas Street CSO | Chain Caul Ward Storm | 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