Gillingham (Medway)

Polluted by sewage 398 times in 2025 lasting 500 hours

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

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Totals for Gillingham (Medway) in 2025

32 Sites polluted by Southern Water

398 sewage dumps

500 hours duration

Sewage pollution map of Gillingham (Medway): 500 hours in 2025

That's 2.98 weeks. On average 1.1 times a day

Change Over Time

Constituency for Gillingham (Medway)

Nearby Constituencies

Waterways in Gillingham (Medway)

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Gillingham (Medway) 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 place 4 of the total 44 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	River Medway	THE STRAND GILLINGHAM CEO	34	78	97.6
Southern Water	River Medway	DOCK ROAD GILLINGHAM CSO	30	50	91.3
Southern Water	River Medway	BERENGRAVE/CHALKY BK GILLINGHAM CS0	18	45	95.2
Southern Water	River Medway Estuary	PUMP LANE GILLINGHAM TANK CSO	15	42	100
Southern Water	Otterham Creek	MAIDSTONE ROAD RAINHAM CSO	26	32	99.9
Southern Water	Otterham Creek	STATION ROAD RAINHAM CSO	30	31	100
Southern Water	River Medway	WILLIAM STREET RAINHAM CSO	21	29	100
Southern Water	River Medway Estuary	CHATHAM HILL OUTSIDE 425 CSO	13	25	48
Southern Water	River Medway	HAWTHORNE AVENUE GILLINGHAM CSO	22	24	85.6
Southern Water	River Medway Estuary	MAGPIE HALL ROAD CHATHAM OUTSIDE 33	24	22	78.6
Southern Water	Medway Estuary	SAUNDERS STREET GILLINGHAM CSO	5	16	100
Southern Water	Saline Estuary	CSO BEECHINGS WAY NO 3	20	16	100
Southern Water	Otterham Creek	ORCHARD STREET GILLINGHAM CSO	9	15	98.8
Southern Water	Otterham Creek	BROOMCROFT ROAD, GILLINGHAM CSO	16	13	54.55
Southern Water	Otterham Creek	WOODSIDE WIGMORE CSO	15	11	100
Southern Water	River Medway Estuary	WOODCHURCH CRESCENT GILLINGHAM CSO	16	9	100
Southern Water	River Medway Estuary	SECOND AVENUE NO 2 CSO	11	5	83.6
Southern Water	River Medway	LOWER TWYDALL LANE GILLINGHAM CSO	15	5	100
Southern Water	River Medway	MAIDA ROAD CHATHAM CSO	10	4	98.8
Southern Water	River Medway Estuary	CLOVER STREET CHATHAM CSO	11	3	99.7
Southern Water	River Medway Estuary	SECOND AVE CHATHAM NO1 CSO	3	2	78.9
Southern Water	River Medway Estuary	SECOND AVENUE NO 3 CHATHAM CSO	3	2	95.9
Southern Water	Medway Estuary	GROVE ROAD CHATHAM OUTSIDE 1 CSO	7	2	87.3
Southern Water	River Medway Estuary	LOWER RAINHAM ROAD LOWER RAINHAM PS	2	1	100
Southern Water	Gillingham Reach/ Medway Est	ST MARYS ROAD GILLINGHAM CSO	4	1	100
Southern Water	River Medway	HERNE ROAD GILLINGHAM CSO	7	1	100
Southern Water	Gillingham Reach/ Medway Est	SAUNDERS STREET GILLINGHAM CSO	2	0	99.9
Southern Water	River Medway	FERNDALE ROAD GILLINGHAM CSO	3	0	99.6
Southern Water	River Medway Estuary	MELBOURNE ROAD CHATHAM CSO	2	0	85.7
Southern Water	River Medway Estuary	GROVE ROAD CHATHAM O/S 77 CSO	1	0	99.6
Southern Water	Saline Estuary	NEW BROOK PUMPING STATION	2	0	99.1
Southern Water	River Medway Estuary	PUMP LANE GILLINGHAM NO.1 CSO	1	0	50.3
Southern Water	River Medway Estuary	CHATHAM HILL CHATHAM OUTSIDE 10 CSO	0	0	50.5
Southern Water	Tidal Estuary Of River Medway	CONSTITUTION HILL CHATHAM CSO	0	0	8.2
Southern Water	River Medway Estuary	CSO HOPWELL DRIVE (CHATHAM)	0	0	99.6
Southern Water	River Medway Estuary	MAGPIE HALL ROAD OUTSIDE 60 CSO	0	0	64.8
Southern Water	River Medway Estuary	ORDNANCE TERRACE CHATHAM CSO	0	0	23.7
Southern Water	River Medway Estuary	STURLA ROAD CHATHAM CSO	0	0	88.5
Southern Water	Otterham Creek	CHALKY BANK ROAD GILLINGHAM CSO	0	0	99.8
Southern Water	River Medway Estuary	DIAL ROAD GILLINGHAM CSO	0	0	49.9
Southern Water	River Medway	HIGH STREET RAINHAM CSO	0	0	75.8
Southern Water	Saline Estuary	MEDWAY ROAD CSO	0	0	100
Southern Water	River Medway	PLANTATION ROAD GILLINGHAM CSO	0	0	96.8
Southern Water	River Medway Estuary	PUMP LANE GILLINGHAM NO.2 CSO	0	0	99.6

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. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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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