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Lewes

Polluted by sewage 757 times in 2025 lasting 6,349 hours

Monitoring fell below 50% in some locations so could be more

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

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Live data for Lewes in 2026

So far this year (as of 16 May 2026, 23:45) there has been 6,981 hours of sewage overflows, from 52 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Lewes in 2025

23 Sites polluted by Southern Water
757 sewage dumps
6,349 hours duration
That's 8.82 months. On average 2.1 times a day

Change Over Time

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Lewes in 2025. 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 3 of the total 30 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Southern Water Tidal River Ouse HAM LANE LEWES SETTLES STORM TANK 155 2,485 99.3
Southern Water Bevern Stream DITCHLING WWTW 85 1,140 98.9
Southern Water Bulldog Sewer / Glynde Reach NEAVES LANE RINGMER WWTW 55 555 92.7
Southern Water Glynde Reach LAUGHTON CSO 47 454 92.4
Southern Water New Stream Ditch WILLINGDON CEO 83 386 98.9
Southern Water Freshwater River UPPER DICKER SEWAGE P.S. 47 359 99.4
Southern Water English Channel NEWHAVEN WWTW 72 256 99.6
Southern Water Unnamed Glynde Reach/Ouse RIPE WWTW 26 165 99.9
Southern Water Mill Ditch POLEGATE CEO 27 147 100
Southern Water Mill Ditch POLEGATE NO.1 CSO LYNHOLM RD POLEGT 21 81 100
Southern Water Glynde Reach GLYNDE NORTH PUMPING STATION 12 79 100
Southern Water Bevern Stream STRAWLANDS WWPS 10 76 100
Southern Water Unnamed Herrings Stream SOUTH STREET DITCHLING CSO 18 39 48.3
Southern Water Celery Sewer River Ouse KINGSTON HOLLOW WWTW 19 31 99.8
Southern Water River Cuckmere THE SPOTS P.S. ALFRISTON 34 29 100
Southern Water Glynde Reach SELMESTON CROSSING S.P.S, SELMESTON 6 24 97.2
Southern Water Groundwaters Via Infiltration EAST DEAN WWTW 4 9 99.4
Southern Water English Channel CLIFF END WWPS SEAFORD 11 9 100
Southern Water River Cuckmere BERWICK WWTW 4 6 100
Southern Water River Ouse COURT ROAD WWPS, LEWES 8 3 99.4
Southern Water Wannock Mill Stream WANNOCK RD WANNOCK CSO, WANNOCK 4 2 99.6
Southern Water Wannock Mill Stream SOUTHFIELD POLEGATE CSO E'BOURNE RD 8 1 100
Southern Water Tidal River Ouse SEAFORD BAY OUTFALL 1 1 41.7
Southern Water River Ouse BEACH ROAD CSO, NEWHAVEN 0 0 90.7
Southern Water Tidal River Ouse DENTON ISLAND NEWHAVEN CSO 0 0 99.7
Southern Water River Ouse FORT ROAD WASTEWATER PS 0 0 99.6
Southern Water Glynde Reach River Ouse GLYNDE SOUTH CEO 0 0 100
Southern Water Freshwater River HIGH STREET POLEGATE 0 0 39.5
Southern Water English Channel At Seaford Bay MARTELLO ROAD SEAFORD CSO 0 0 100
Southern Water Willingdon Upper Sewer OXENDEN GARDENS WILLINGDON CSO 0 0 85

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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