It's a Dirty Business

Watch Channel 4's documentary about the state of the water industry.

Hamble Valley - 2025 Sewage

Polluted by sewage 1,525 hours in 2025

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

Which Year?

Select Another Constituency

Select the constituency from the drop-down
✔ means we have live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Hamble Valley for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

Take Action

Your local MP is Paul Holmes (Conservative) - Find out more about their interests, donors, and voting at They Work For You

Share this page, post a message, and tell others about the huge problem of sewage pollution across the UK

Daily Data

Jan - 538 hours
Feb - 193 hours
Mar - 53 hours
Apr - 9 hours
May - 1 hours
Jun - 9 hours
Jul - 5 hours
Aug - 26 hours
Sept - 48 hours
Oct - 169 hours
Nov - 53 hours
Dec - 416 hours
We need your support!

Thank you so much to everyone who contributed to the site in 2025 to keep it running. We do rely on your contributions! Developing and running a website costs real money.
Please consider a one-off or small recurring donation.

Donate Now

Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Southern Water HAMBLE LANE BURSLEDON CEO - 113675 River Hamble Estuary 23 286 h 57m -
Southern Water BROOK LANE BOTLEY CEO - 108841 River Hamble 14 216 h 24m -
Southern Water HUNGERFORD BOTTOM BURSLEDON CEO - 108446 Hungerford Stream 28 153 h 28m -
Southern Water HAMBLEWOOD BOTLEY CSO - 108845 River Hamble 20 91 h 35m -
Southern Water HAMBLE LANE BURSLEDON CEO - 113675 River Hamble Estuary 7 87 h 48m -
Southern Water HUNGERFORD BOTTOM BURSLEDON CEO - 108446 Hungerford Stream 7 71 h 2m -
Southern Water SALTERNS LANE BURSLEDON CEO - 108879 Badnam Creek 23 64 h 7m -
Southern Water BROADOAK BOTLEY CSO - 108401 River Hamble 25 62 h 24m -
Southern Water BROADOAK BOTLEY CSO - 108401 River Hamble 4 50 h 58m -
Southern Water BROOK LANE BOTLEY CEO - 108841 River Hamble 3 45 h 15m -
Southern Water HOOK PARK NO.1 CEO - 111291 Southampton Water 9 45 h 5m -
Southern Water NEWTOWN ROAD NEWTOWN CEO - 108461 Hook Lake 7 43 h 55m -
Southern Water CHURCH LANE BOTLEY CEO - 108413 River Hamble 4 40 h 27m -
Southern Water SALTERNS LANE BURSLEDON CEO - 108879 Badnam Creek 7 34 h 4m -
Southern Water POUND ROAD BURSLEDON CEO - 108878 River Itchen 2 29 h 29m -
Southern Water POUND ROAD BURSLEDON CEO - 108878 River Itchen 4 27 h 4m -
Southern Water HOOK PARK NO.1 CEO - 111291 Southampton Water 3 23 h 9m -
Southern Water HOOK PARK NO.2 CEO - 108444 Southampton Water 3 21 h 42m -
Southern Water Unknown Unknown 3 21 h 41m -
Southern Water NEWTOWN ROAD NEWTOWN CEO - 108461 Hook Lake 3 16 h 15m -
Southern Water SCHOOL LANE HAMBLE CEO - 108826 River Hamble 2 15 h 40m -
Southern Water SCHOOL LANE HAMBLE CEO - 108826 River Hamble 10 15 h 29m -
Southern Water HOOK PARK NO.2 CEO - 108444 Southampton Water 2 13 h 39m -
Southern Water ENSIGN PARK HAMBLE CEO - 108831 Southampton Water 4 10 h 52m -
Southern Water CHURCH LANE BOTLEY CEO - 108413 River Hamble 1 10 h 19m -
Southern Water HAMBLEWOOD BOTLEY CSO - 108845 River Hamble 1 9 h 48m -
Southern Water FAIRTHORNE MANOR CEO - 108834 Shawfords Lake 2 9 h 8m -
Southern Water FAIRTHORNE MANOR CEO - 108834 Shawfords Lake 1 5 h 29m -
Southern Water Unknown Unknown 2 2 h -
Southern Water DIBLES ROAD WARSASH CEO - 108421 Hook Lake 0 0 h -
Southern Water Unknown Unknown 0 0 h -
Southern Water Unknown Unknown 0 0 h -
Southern Water Unknown Unknown 0 0 h -
Southern Water BEACH LANE NETLEY CEO - 108827 Southampton Water 0 0 h -

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. 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.