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North West Hampshire - Live Sewage

Polluted by sewage 3,925 hours in 2026 , potential overflows 398 hours so far..

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

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in North West Hampshire so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

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.

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Constituencies near North West Hampshire

Daily Data

Jan - 1,768 hours
Feb - 1,895 hours
Mar - 157 hours
Apr - 103 hours , 398 potential
May - 0 hours
Jun - 0 hours
Jul - 0 hours
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Thames Water Wash Water STW Pound Street Brook 49 998h 45m -
Thames Water Kingsclere STW Kingsclere Brook 49 877h -
Thames Water West Heath (Charter Alley) SPS Bow Brook 55 747h 30m 398 h
Thames Water Knights Lane (Ball Hill) SPS Enbourn 37 658h 45m -
Thames Water Blind Mans Gate (Highclere) SPS Penwood Stream 29 321h 45m -
Southern Water OVERTON SSO - 115916 Groundwater 21 291h 48m -
Thames Water St Stephens Hall (Little London) SPS Bow Brook 30 22h 8m -
Thames Water Swains Road (Tadley) SPS Silchester Brook 3 8h 15m -
Southern Water Unknown Unknown 0 0h -
Thames Water Wash Water STW Pound Street Brook 0 0h -
Thames Water Kingsclere STW Kingsclere Brook 0 0h -
Thames Water West Heath (Charter Alley) SPS Bow Brook 0 0h -
Thames Water Swains Road (Tadley) SPS Silchester Brook 0 0h -
Thames Water Knights Lane (Ball Hill) SPS Enbourn 0 0h -
Thames Water St Stephens Hall (Little London) SPS Bow Brook 0 0h -
Thames Water Blind Mans Gate (Highclere) SPS Penwood Stream 0 0h -
Southern Water OVERTON SSO - 115916 Groundwater 0 0h -

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.

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Analysing sewage pollution by the Water Industry

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Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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