Chatham

Polluted by sewage 193 times in 2025 lasting 533 hours

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

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Totals for Chatham in 2025

17 Sites polluted by Southern Water

193 sewage dumps

533 hours duration

Sewage pollution map of Chatham: 533 hours in 2025

That's 3.17 weeks. 3.7 times a week, on average

Change Over Time

Constituency for Chatham

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Waterways in Chatham

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Chatham 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 5 of the total 28 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 Estaury Of River Medway	CORPORATION ST ROCHESTER NO 2 CSO	21	296	68.8
Southern Water	River Medway Estuary	FURRELLS ROAD, ROCHESTER CSO	26	70	100
Southern Water	River Medway	DOCK ROAD GILLINGHAM CSO	30	50	91.3
Southern Water	Tidal Estuary Of River Medway	NORTHGATE ROCHESTER CSO	24	44	99
Southern Water	River Medway Estuary	CHATHAM HILL OUTSIDE 425 CSO	13	25	48
Southern Water	River Medway Estuary	MAGPIE HALL ROAD CHATHAM OUTSIDE 33	24	22	78.6
Southern Water	River Medway Estuary	SECOND AVENUE NO 2 CSO	11	5	83.6
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	RIDGEWAY BANKS CHATHAM CSO	4	2	69.6
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	WALDERSLADE ROAD CHATHAM 149 CSO	1	0	47.9
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	CHATHAM HILL CHATHAM OUTSIDE 10 CSO	0	0	50.5
Southern Water	River Medway	CONCORD AVENUE CHATHAM 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	River Medway Estuary	CORPORATION STREET ROCHESTER CEO	0	0	88.8
Southern Water	River Medway Estuary	HIGH STREET ROCHESTER CSO	0	0	13.9
Southern Water	River Medway	ROCHESTER AVENUE ROCHESTER CSO	0	0	99.6
Southern Water	Whitewall Creek	WHITEWALL CREEK WWTW	0	0	99.9

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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