Romsey and Southampton North was polluted by sewage 881 times in 2024
lasting 14,373 hours - that's 1.66 years!

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
Select the constituency from the drop-down
✔ means we have experimental daily data since 2023
Live data for Romsey and Southampton North in 2025
So far this year (as of Apr 16, 2025, 6:00 PM) there has been 4,782 hours of sewage overflows - that's 0.55 years!
Totals for Romsey and Southampton North in 2024
18 Sites polluted by Southern Water
881 sewage dumps
14,373 h duration
That's 1.66 years! On average 2.4 times a day
Change Over Time
Take Action
Your local MP is Caroline Nokes (Conservative) - Find out more about their interests, donors, and voting at They Work For You

Daily Data
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Romsey and Southampton North, 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 Romsey and Southampton North 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 19 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 Test KINGS SOMBORNE WWTW 252 5,481 98
Southern Water River Blackwater WEST WELLOW WWTW 216 4,059 99.9
Southern Water River Test FULLERTON WASTEWATER TREATMENT WORK 74 1,314 99.9
Southern Water Marshcourt River STOCKBRIDGE WWTW 100 1,303 100
Southern Water River Test ROMSEY WWTW 68 959 99.8
Southern Water River Blackwater WELLOW MILL WPS 63 755 99.8
Southern Water River Test CHILBOLTON WWTW 17 175 99.8
Southern Water Unnamed Of River Test RINGWOOD DRIVE NORTH BADDESLEY CEO 24 150 99.7
Southern Water River Itchen SIRDAR ROAD SOUTHAMPTON CSO 33 81 100
Southern Water River Test MEMORIAL PARK ROMSEY CEO 4 33 73
Southern Water River Itchen GREEN LANE CHILWORTH CEO 2 20 86.7
Southern Water River Test TRAFALGAR WAY STOCKBRIDGE CEO 5 15 100
Southern Water Tadburn Lake THE HUNDRED ROMSEY CSO 4 11 71.1
Southern Water River Test HOUGHTON ROAD STOCKBRIDGE CEO 5 6 99.7
Southern Water Tadburn Lake BOTLEY ROAD WPS (NORTH BADDESLEY) 2 2 99.7
Southern Water Saline Estuary WESSEX LANE SOUTHAMPTON 1 1 100
Southern Water Saline Estuary WESSEX LANE SOUTHAMPTON OUTSIDE 15 1 1 100
Southern Water Saline Estuary WESSEX LANE SOUTHAMPTON OUTSIDE 11 10 1 57.2
Southern Water Tadburn Lake EIGHT ACRES ROMSEY CSO 0 0 59

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.