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Polluted by sewage 949 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 Winchester, 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) |
|---|---|---|---|---|---|
| Southern Water | HEATHEN LANE DURLEY CEO - 108836 | Ford Lake Via Stream | 35 | 388 h 2m | 16.17 |
| Southern Water | DURLEY LANE DURLEY CEO - 108835 | River Hamble | 24 | 188 h 41m | 7.83 |
| Southern Water | BISHOPS WALTHAM SSO - 115716 | River Hamble | 11 | 132 h 46m | 5.5 |
| Southern Water | HEATHEN LANE DURLEY CEO - 108836 | Ford Lake Via Stream | 12 | 119 h 51m | 4.96 |
| Southern Water | DURLEY LANE DURLEY CEO - 108835 | River Hamble | 5 | 53 h 27m | 2.21 |
| Southern Water | Unknown | Unknown | 6 | 20 h 44m | 0.83 |
| Southern Water | HARESTOCK SSO - 115789 | River Itchen | 2 | 17 h 58m | 0.71 |
| Southern Water | Unknown | Unknown | 3 | 11 h 7m | 0.46 |
| Southern Water | ASHTON CORNER CEO - 108898 | River Hamble | 2 | 4 h 59m | 0.17 |
| Southern Water | GARNIER ROAD WINCHESTER CEO - 108433 | Freshwater River | 1 | 4 h 36m | 0.17 |
| Southern Water | NEW ALRESFORD SSO - 115779 | Groundwater | 1 | 2 h 21m | 0.08 |
| Southern Water | GARNIER ROAD WINCHESTER CEO - 108433 | Freshwater River | 2 | 2 h 13m | 0.08 |
| Southern Water | MORESTEAD ROAD WINCHESTER PUMPED SSO - 116368 | Groundwaters Via 2 Infilt Syst | 1 | 1 h 34m | 0.04 |
| Southern Water | SPRING GARDENS ALRESFORD CEO - 108484 | River Itchen | 1 | 0 h 40m | 0 |
| Southern Water | SPRING GARDENS ALRESFORD CEO - 108484 | River Itchen | 0 | 0 h | 0 |
| Southern Water | NEW ALRESFORD SSO - 115779 | Groundwater | 0 | 0 h | 0 |
| Southern Water | MORESTEAD ROAD WINCHESTER SSO - 115740 | Groundwaters Via 2 Infilt Syst | 0 | 0 h | 0 |
| Southern Water | BISHOPS WALTHAM SSO - 115716 | River Hamble | 0 | 0 h | 0 |
| Southern Water | HARESTOCK SSO - 115789 | River Itchen | 0 | 0 h | 0 |
| Southern Water | Unknown | Unknown | 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