Chichester was polluted by sewage 914 times in 2024
lasting 15,864 hours - that's 1.84 years!

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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 Chichester in 2025
So far this year (as of Apr 16, 2025, 5:45 PM) there has been 4,619 hours of sewage overflows - that's 0.53 years!
Totals for Chichester in 2024
14 Sites polluted by Southern Water
914 sewage dumps
15,864 h duration
That's 1.84 years! On average 2.5 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 Chichester, 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 Chichester 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 17 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 Lavant LAVANT WWTW 287 6,829 96.5
Southern Water Aldingbourne Rife TANGMERE WASTEWATER TREATMENT WORKS 128 2,527 99.9
Southern Water Chichester Harbour CHICHESTER WWTW 114 1,811 99.1
Southern Water Pagham Rife PAGHAM WASTEWATER TREATMENT WORKS 72 1,194 97.5
Southern Water Broad Rife SIDLESHAM WWTW 57 789 99.9
Southern Water Chichester Harbour Channel BOSHAM WWTW 65 742 100
Southern Water Chichester Hbr Via Little Deep THORNHAM WWTW 63 681 100
Southern Water Ham Brook CSO BREAKERS YARD NUTBOURNE 36 412 99.8
Southern Water Pagham Rife NORTH MUNDHAM WPS (PAGHAM ROAD) 29 341 100
Southern Water Chichester Harbour TAYLORS LANE BOSHAM, WWPS 22 193 99.9
Southern Water Chichester Harbour MAIN ROAD FISHBOURNE CSO 19 178 100
Southern Water To Chichester Harbour CHIDHAM LANE SPS CHIDHAM 12 85 100
Southern Water Bremere Rife MAIN ROAD HUNSTON CEO 9 74 100
Southern Water Ham Brook SCHOOL LANE PS 1 1 99.9
Southern Water River Ems LUMLEY ROAD PUMPING STATION 0 0 100
Southern Water English Channel CHURCH ROAD SELSEY CSO 0 0 99.1
Southern Water English Channel EAST BEACH ROAD SELSEY CSO 0 0 50

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.