Hamble Valley was polluted by sewage 450 times in 2024
lasting 3,961 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
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✔ means we have experimental daily data since 2023
Live data for Hamble Valley in 2025
So far this year (as of Apr 16, 2025, 6:00 PM) there has been 789 hours of sewage overflows
Totals for Hamble Valley in 2024
16 Sites polluted by Southern Water
450 sewage dumps
3,961 h duration
That's 5.5 months. On average 1.2 times a day
Change Over Time
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Daily Data
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.
     Monitoring Online      Monitoring Offline      Polluting      Potentially Polluting      Unknown
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Pollution Summary 2024

Here are all the reported sewage overflow totals for Hamble Valley in 2024. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency 0 of the total 21 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Southern Water River Hamble Estuary HAMBLE LANE BURSLEDON WASTEWATER PS 63 949 99.6
Southern Water River Hamble BROOK LANE PS 47 675 99.7
Southern Water Hungerford Stream HUNGERFORD BOTTOM BURSLEDON CEO 66 533 99.8
Southern Water Hook Lake NEWTOWN ROAD NEWTOWN CEO 34 475 99.9
Southern Water River Itchen POUND ROAD BURSLEDON CEO 95 437 99.7
Southern Water Badnam Creek SALTERNS LANE BURSLEDON CEO 58 356 99.8
Southern Water River Hamble BROAD OAK BOTLEY CSO 25 230 76.6
Southern Water Southampton Water HOOK PARK WPS 18 109 99.6
Southern Water River Hamble SCHOOL LANE HAMBLE CEO 20 96 99.9
Southern Water Shawfords Lake FAIRTHORNE MANOR CEO 8 49 99.6
Southern Water River Hamble CHURCH LANE BOTLEY CEO 2 13 99.7
Southern Water Southampton Water ENSIGN PARK HAMBLE CEO 1 11 99.8
Southern Water Hook Lake DIBLES ROAD WARSASH PS 1 8 99.6
Southern Water River Hamble HAMBLEWOOD BOTLEY CSO 7 7 67.6
Southern Water Southampton Water BEACH LANE NETLEY CEO 2 5 90.3
Southern Water Wildern Stream CHALICE COURT HEDGE END CEO 3 2 99.9
Southern Water To Spear Pond Gully INGLESIDE NETLEY PUMPING STATION 0 0 100
Southern Water Southampton Water VICTORIA ROAD NETLEY CEO 0 0 99.9
Southern Water Curbridge Stream WHITELEY WPS 0 0 99.5
Southern Water Burridge Stream WELLS CLOSE WHITELEY CEO 0 0 94.8
Southern Water Moorgreen Stream MARLBOROUGH GARDENS HEDGE END CEO 0 0 99.8

Data Sources & Accuracy

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. This 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.