Polluted by sewage 1,525 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 Hamble Valley, 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 | HAMBLE LANE BURSLEDON CEO - 113675 | River Hamble Estuary | 23 | 286 h 57m | 11.92 |
| Southern Water | BROOK LANE BOTLEY CEO - 108841 | River Hamble | 14 | 216 h 24m | 9 |
| Southern Water | HUNGERFORD BOTTOM BURSLEDON CEO - 108446 | Hungerford Stream | 28 | 153 h 28m | 6.38 |
| Southern Water | HAMBLEWOOD BOTLEY CSO - 108845 | River Hamble | 20 | 91 h 35m | 3.79 |
| Southern Water | HAMBLE LANE BURSLEDON CEO - 113675 | River Hamble Estuary | 7 | 87 h 48m | 3.62 |
| Southern Water | HUNGERFORD BOTTOM BURSLEDON CEO - 108446 | Hungerford Stream | 7 | 71 h 2m | 2.96 |
| Southern Water | SALTERNS LANE BURSLEDON CEO - 108879 | Badnam Creek | 23 | 64 h 26m | 2.67 |
| Southern Water | BROADOAK BOTLEY CSO - 108401 | River Hamble | 25 | 62 h 24m | 2.58 |
| Southern Water | BROADOAK BOTLEY CSO - 108401 | River Hamble | 4 | 50 h 58m | 2.08 |
| Southern Water | BROOK LANE BOTLEY CEO - 108841 | River Hamble | 3 | 45 h 15m | 1.88 |
| Southern Water | HOOK PARK NO.1 CEO - 111291 | Southampton Water | 9 | 45 h 5m | 1.88 |
| Southern Water | NEWTOWN ROAD NEWTOWN CEO - 108461 | Hook Lake | 7 | 43 h 55m | 1.79 |
| Southern Water | CHURCH LANE BOTLEY CEO - 108413 | River Hamble | 4 | 40 h 27m | 1.67 |
| Southern Water | SALTERNS LANE BURSLEDON CEO - 108879 | Badnam Creek | 7 | 34 h 4m | 1.42 |
| Southern Water | POUND ROAD BURSLEDON CEO - 108878 | River Itchen | 2 | 29 h 29m | 1.21 |
| Southern Water | POUND ROAD BURSLEDON CEO - 108878 | River Itchen | 4 | 27 h 4m | 1.12 |
| Southern Water | HOOK PARK NO.1 CEO - 111291 | Southampton Water | 3 | 23 h 9m | 0.96 |
| Southern Water | HOOK PARK NO.2 CEO - 108444 | Southampton Water | 3 | 21 h 42m | 0.88 |
| Southern Water | Unknown | Unknown | 3 | 21 h 41m | 0.88 |
| Southern Water | NEWTOWN ROAD NEWTOWN CEO - 108461 | Hook Lake | 3 | 16 h 15m | 0.67 |
| Southern Water | SCHOOL LANE HAMBLE CEO - 108826 | River Hamble | 2 | 15 h 40m | 0.62 |
| Southern Water | SCHOOL LANE HAMBLE CEO - 108826 | River Hamble | 10 | 15 h 29m | 0.62 |
| Southern Water | HOOK PARK NO.2 CEO - 108444 | Southampton Water | 2 | 13 h 39m | 0.54 |
| Southern Water | ENSIGN PARK HAMBLE CEO - 108831 | Southampton Water | 4 | 10 h 52m | 0.42 |
| Southern Water | CHURCH LANE BOTLEY CEO - 108413 | River Hamble | 1 | 10 h 19m | 0.42 |
| Southern Water | HAMBLEWOOD BOTLEY CSO - 108845 | River Hamble | 1 | 9 h 48m | 0.38 |
| Southern Water | FAIRTHORNE MANOR CEO - 108834 | Shawfords Lake | 2 | 9 h 8m | 0.38 |
| Southern Water | FAIRTHORNE MANOR CEO - 108834 | Shawfords Lake | 1 | 5 h 29m | 0.21 |
| Southern Water | Unknown | Unknown | 2 | 2 h | 0.08 |
| Southern Water | Unknown | Unknown | 0 | 0 h | 0 |
| Southern Water | DIBLES ROAD WARSASH CEO - 108421 | Hook Lake | 0 | 0 h | 0 |
| Southern Water | BEACH LANE NETLEY CEO - 108827 | Southampton Water | 0 | 0 h | 0 |
| Southern Water | Unknown | Unknown | 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.