Lewes was polluted by sewage 1,588 times in 2024
lasting 18,001 hours - that's 2.08 years!

Constituency

Select the constituency from the drop-down

✔ means we have experimental daily data since 2023

Live data for Lewes in 2025

So far this year (as of Apr 16, 2025, 6:15 PM) there has been 3,528 hours of sewage overflows - that's 0.41 years!

Totals for Lewes in 2024

27 Sites polluted by Southern Water

1,588 sewage dumps
18,001 h duration

That's 2.08 years! On average 4.4 times a day

Change Over Time

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Constituencies near Lewes

Waterways in Lewes

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Lewes, 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 Lewes 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 30 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	Tidal River Ouse	HAM LANE LEWES SETTLES STORM TANK	259	4,824	99.3
Southern Water	Bevern Stream	DITCHLING WWTW	158	2,652	92.5
Southern Water	River Cuckmere	THE SPOTS P.S. ALFRISTON	156	2,486	99.9
Southern Water	Bulldog Sewer / Glynde Reach	NEAVES LANE RINGMER WWTW	104	1,286	99.7
Southern Water	New Stream Ditch	WILLINGDON CEO	150	1,116	94.9
Southern Water	Glynde Reach	LAUGHTON CSO	81	962	96.8
Southern Water	English Channel	NEWHAVEN WWTW	129	869	98.6
Southern Water	Unnamed Glynde Reach/Ouse	RIPE WWTW	63	817	99.8
Southern Water	Freshwater River	UPPER DICKER SEWAGE P.S.	76	739	99.9
Southern Water	Mill Ditch	POLEGATE CEO	58	559	100
Southern Water	Celery Sewer River Ouse	KINGSTON HOLLOW WWTW	54	261	99.6
Southern Water	Glynde Reach	GLYNDE NORTH PUMPING STATION	28	257	99.9
Southern Water	River Cuckmere	BERWICK WWTW	24	255	99.9
Southern Water	Mill Ditch	POLEGATE NO.1 CSO LYNHOLM RD POLEGT	41	254	100
Southern Water	Bevern Stream	STRAWLANDS WWPS	22	157	100
Southern Water	Tidal River Ouse	DENTON ISLAND NEWHAVEN CSO	15	135	99.7
Southern Water	Glynde Reach River Ouse	GLYNDE SOUTH CEO	12	101	100
Southern Water	River Ouse	COURT ROAD WWPS, LEWES	82	81	99.8
Southern Water	Groundwaters Via Infiltration	EAST DEAN WWTW	16	38	99.4
Southern Water	Wannock Mill Stream	SOUTHFIELD POLEGATE CSO E'BOURNE RD	11	32	99.7
Southern Water	Wannock Mill Stream	WANNOCK RD WANNOCK CSO, WANNOCK	8	28	96.3
Southern Water	Glynde Reach	SELMESTON CROSSING S.P.S, SELMESTON	13	27	99.6
Southern Water	English Channel	CLIFF END WWPS SEAFORD	18	23	99.9
Southern Water	Tidal River Ouse	SEAFORD BAY OUTFALL	6	19	91.7
Southern Water	River Ouse	FORT ROAD WASTEWATER PS	2	7	99.7
Southern Water	Unnamed Herrings Stream	SOUTH STREET DITCHLING CSO	1	1	13.2
Southern Water	Freshwater River	HIGH STREET POLEGATE	1	0	25.5
Southern Water	Willingdon Upper Sewer	OXENDEN GARDENS WILLINGDON CSO	0	0	48.1
Southern Water	English Channel At Seaford Bay	MARTELLO ROAD SEAFORD CSO	0	0	98.6
Southern Water	River Ouse	BEACH ROAD CSO, NEWHAVEN	0	0	5.6

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.

Analysing sewage pollution by the Water Industry

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