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Romsey and Southampton North - 2025 Sewage

Polluted by sewage 6,062 hours in 2025

© OpenStreetMap contributors
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 Romsey and Southampton North 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.

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Constituencies near Romsey and Southampton North

Daily Data

Jan - 1,856 hours
Feb - 1,557 hours
Mar - 992 hours
Apr - 560 hours
May - 0 hours
Jun - 0 hours
Jul - 1 hours
Aug - 2 hours
Sept - 7 hours
Oct - 33 hours
Nov - 97 hours
Dec - 954 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
Southern Water KINGS SOMBORNE SSO - 115725 River Test 114 2,718 h 57m -
Southern Water WEST WELLOW SSO - 115727 River Blackwater 80 1,635 h 8m -
Southern Water WEST WELLOW SSO - 115727 River Blackwater 27 569 h 24m -
Southern Water ROMSEY SSO - 115431 River Test 14 256 h 46m -
Southern Water STOCKBRIDGE SSO - 115752 Marshcourt River 17 237 h 39m -
Southern Water KINGS SOMBORNE SSO - 115725 River Test 10 185 h 22m -
Southern Water WELLOW MILL BLACKHILL CEO - 108499 River Blackwater 14 148 h 49m -
Southern Water WELLOW MILL BLACKHILL CEO - 108499 River Blackwater 10 113 h 46m -
Southern Water ROMSEY SSO - 115431 River Test 6 78 h 20m -
Southern Water RINGWOOD DRIVE NORTH BADDESLEY CEO - 109515 Unnamed Of River Test 9 47 h 7m -
Southern Water CHILBOLTON SSO - 115879 River Test 2 14 h 6m -
Southern Water RINGWOOD DRIVE NORTH BADDESLEY CEO - 109515 Unnamed Of River Test 2 10 h -
Southern Water Unknown Unknown 2 9 h 52m -
Southern Water MEMORIAL PARK ROMSEY CEO - 110235 River Test 1 8 h 42m -
Southern Water GREEN LANE CHILWORTH CEO - 108785 River Itchen 1 8 h 13m -
Southern Water MEMORIAL PARK ROMSEY CEO - 110235 River Test 2 8 h 8m -
Southern Water TRAFALGAR WAY STOCKBRIDGE CEO - 108500 River Test 1 7 h 12m -
Southern Water HOUGHTON ROAD STOCKBRIDGE CEO - 108487 River Test 2 2 h 36m -
Southern Water STOCKBRIDGE SSO - 115752 Marshcourt River 2 1 h 21m -
Southern Water TRAFALGAR WAY STOCKBRIDGE CEO - 108500 River Test 2 0 h 40m -
Southern Water KINGS SOMBORNE CEO - 115989 River Test 1 0 h 31m -
Southern Water WESSEX LANE SOUTHAMPTON OUTSIDE 15 CSO - 108495 Saline Estuary 1 0 h 4m -
Southern Water FULLERTON SSO - 115765 River Test 2 0 h -
Southern Water Unknown Unknown 0 0 h -
Southern Water WESSEX LANE SOUTHAMPTON OUTSIDE 11 CSO - 108496 Saline Estuary 0 0 h -
Southern Water WESSEX LANE SOUTHAMPTON OUTSIDE X CSO - 108497 Saline Estuary 0 0 h -
Southern Water FULLERTON SSO - 115765 River Test 0 0 h -
Southern Water KINGS SOMBORNE CEO - 115989 River Test 0 0 h -
Southern Water BOTLEY ROAD NORTH BADDESLEY CEO - 108398 Tadburn Lake 0 0 h -
Southern Water Unknown Unknown 0 0 h -
Southern Water THE HUNDRED ROMSEY CSO - 110233 Tadburn Lake 0 0 h -
Southern Water CHILBOLTON SSO - 115879 River Test 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.

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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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