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Polluted by sewage 3,206 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 Norwich South, 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 | Norwich School Lane/Bedford Street Combined Sewer Overflow | River Wensum | 40 | 827 h 23m | 34.46 |
| Anglian Water | NORWICH - KETTS HILL | River Wensum | 51 | 545 h 47m | 22.71 |
| Anglian Water | King Street Combined Sewer Overflow (Previously Known as Turning Basin CSO) | River Wensum | 48 | 538 h 33m | 22.42 |
| Anglian Water | Trowse Terminal Pumping Station | River Yare | 31 | 532 h 25m | 22.17 |
| Anglian Water | Norwich Sandy Lane Combined Sewer Overflow | River Yare | 31 | 302 h 52m | 12.58 |
| Anglian Water | Norwich - Gibraltar Gardens Combined Sewer Overflow | River Wensum | 15 | 156 h 50m | 6.5 |
| Anglian Water | Norwich Cedar Road Combined Sewer Overflow | River Wensum | 8 | 95 h 57m | 3.96 |
| Anglian Water | Norwich Carrow Road Combined Sewer Overflow | River Wensum | 8 | 75 h 45m | 3.12 |
| Anglian Water | Norwich - Gibraltar Gardens Combined Sewer Overflow | River Wensum | 6 | 35 h 57m | 1.46 |
| Anglian Water | Trowse Terminal Pumping Station | River Yare | 5 | 22 h 52m | 0.92 |
| Anglian Water | NORWICH - KETTS HILL | River Wensum | 9 | 19 h 46m | 0.79 |
| Anglian Water | King Street Combined Sewer Overflow (Previously Known as Turning Basin CSO) | River Wensum | 8 | 16 h 2m | 0.67 |
| Anglian Water | Norwich Angel Road Combined Sewer Overflow | River Wensum | 5 | 12 h 2m | 0.5 |
| Anglian Water | NORWICH-KING STREET SSO #2 | River Wensum | 16 | 9 h 20m | 0.38 |
| Anglian Water | Norwich Lower Close (Ferry Lane) Combined Sewer Overflow | River Wensum | 5 | 6 h 30m | 0.25 |
| Anglian Water | NORWICH-FYE BRIDGE (N) SSO | Wensum Ds Norwich | 6 | 2 h 26m | 0.08 |
| Anglian Water | Norwich - Prince of Wales Road Combined Sewer Overflow | River Wensum | 3 | 1 h 28m | 0.04 |
| Anglian Water | NORWICH - RIVER LANE | River Wensum | 3 | 1 h 14m | 0.04 |
| Anglian Water | Norwich St.Faiths Lane Combined Sewer Overflow | River Wensum | 3 | 1 h | 0.04 |
| Anglian Water | Norwich School Lane/Bedford Street Combined Sewer Overflow | River Wensum | 2 | 0 h 45m | 0 |
| Anglian Water | NORWICH-BARRACK STREET SSO | River Wensum | 2 | 0 h 44m | 0 |
| Anglian Water | NORWICH-KING STREET SSO #2 | River Wensum | 1 | 0 h 15m | 0 |
| Anglian Water | NORWICH-NEW MILLS SSO | River Wensum | 1 | 0 h 15m | 0 |
| Anglian Water | NORWICH - RECORDER ROAD | River Wensum | 1 | 0 h 15m | 0 |
| Anglian Water | NORWICH-FYE BRIDGE (N) SSO | Wensum Ds Norwich | 1 | 0 h 14m | 0 |
| Anglian Water | NORWICH - ROSARY ROAD | River Wensum | 1 | 0 h 8m | 0 |
| Anglian Water | NORWICH-ELM HILL SSO | River Wensum | 0 | 0 h | 0 |
| Anglian Water | Norwich Cedar Road Combined Sewer Overflow | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH-NEW MILLS SSO | River Wensum | 0 | 0 h | 0 |
| Anglian Water | Norwich Sandy Lane Combined Sewer Overflow | River Yare | 0 | 0 h | 0 |
| Anglian Water | Norwich Angel Road Combined Sewer Overflow | River Wensum | 0 | 0 h | 0 |
| Anglian Water | Norwich St.Faiths Lane Combined Sewer Overflow | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH, BRACONDALE CSO | River Yare | 0 | 0 h | 0 |
| Anglian Water | NORWICH - ROSARY ROAD | River Wensum | 0 | 0 h | 0 |
| Anglian Water | Norwich Lower Close (Ferry Lane) Combined Sewer Overflow | River Wensum | 0 | 0 h | 0 |
| Anglian Water | WENSUM VALLEY-LUSHER RISE SSO | Wensum Ds Norwich | 0 | 0 h | 0 |
| Anglian Water | Norwich Carrow Road Combined Sewer Overflow | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH - CHALK HILL RD | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH - OAK LANE | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH-ELM HILL SSO | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH - RIVER LANE | River Wensum | 0 | 0 h | 0 |
| Anglian Water | Norwich - Prince of Wales Road Combined Sewer Overflow | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH - RECORDER ROAD | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH-BARRACK STREET SSO | River Wensum | 0 | 0 h | 0 |
| Anglian Water | NORWICH, BRACONDALE CSO | River Yare | 0 | 0 h | 0 |
| Anglian Water | NORWICH - CHALK HILL RD | River Wensum | 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