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Derby

Polluted by sewage 809 times in 2025 lasting 2,220 hours

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Totals for Derby in 2025

50 Sites polluted by Severn Trent Water

809 sewage dumps

2,220 hours duration

That's 3.08 months. On average 2.2 times a day

Change Over Time

Constituency for Derby

Nearby Constituencies

Waterways in Derby

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Derby 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 all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Severn Trent Water	River Derwent	DERBY SEWAGE TREATMENT WORKS	49	458	100
Severn Trent Water	River Derwent	GREEN LANE PUMPING STATION	53	295	99.1
Severn Trent Water	River Derwent	ALVASTON CSO	47	197	100
Severn Trent Water	River Derwent	KEDLESTON ROAD CSO	46	146	100
Severn Trent Water	Chaddesden Brook	JOHN BERRYSFORD CLOSE CSO	53	133	98.2
Severn Trent Water	Bramble Brook	MELBOURNE CLOSE PS - STORM O/F	10	87	95.1
Severn Trent Water	River Derwent	OFF STONEY GATE ROAD CSO	39	87	100
Severn Trent Water	River Derwent	EASTGATE PENTAGON ISLAND CSO	15	83	100
Severn Trent Water	Markeaton Brook	ST. ANNES CLOSE CSO	25	81	94.1
Severn Trent Water	River Derwent	STATION APPROACH CSO	30	61	99.9
Severn Trent Water	Markeaton Brook	MARKEATON LANE CSO	12	57	100
Severn Trent Water	River Derwent	DERBY ROAD CSO	37	56	91.8
Severn Trent Water	Egginton Brook	MICKLEOVER - SANDOWN AVENUE SPS	17	52	100
Severn Trent Water	Markeaton Brook	LEYLANDS / BROADWAY 76 CSO	32	50	100
Severn Trent Water	Markeaton Brook	MARKEATON ST/MERCHANT ST JCN CSO	20	49	100
Severn Trent Water	River Derwent	WAYZGOOSE COMBINED SEWER OVERFLOW	20	46	100
Severn Trent Water	River Derwent	SANDRINGHAM DRIVE CSO	28	40	100
Severn Trent Water	River Derwent	ANGLERS LANE CSO	7	32	100
Severn Trent Water	Hell Brook	SO MICKLEOVER HS/BRIERFIELD WAY CSO	10	25	99.9
Severn Trent Water	River Derwent	WILMORTON COLLEGE/HARROW STREET CSO	21	25	92.1
Severn Trent Water	River Derwent	NOTTINGHAM ROAD CSO	17	22	100
Severn Trent Water	Chaddesden Brook	NOTTINGHAM RD/THE CRESCENT JCN CSO	17	15	99.2
Severn Trent Water	Cuttle Brook	DAVIDS CLOSE/STATION ROAD CSO	4	14	100
Severn Trent Water	River Derwent	DARLEY ABBEY CSO	8	12	100
Severn Trent Water	Markeaton Brook	UTTOXETER NEW RD 2/STAFFORD ST CSO	21	12	100
Severn Trent Water	Meadow Drain	SINFIN - WILMORE AVENUE CSO	2	11	98.5
Severn Trent Water	River Derwent	ALLESTREE SEWAGE PUMPING STATION	3	8	100
Severn Trent Water	Chaddesden Brook	DURHAM AVENUE/SUFFOLK AVENUE CSO	22	8	100
Severn Trent Water	Markeaton Brook	SHAWS GREEN COMBINED SEWER OVERFLOW	22	7	100
Severn Trent Water	Chaddesden Brook	CHADDESDEN PARK RD/MAYFIELD RD CSO	25	7	100
Severn Trent Water	Markeaton Brook	GREAT NORTHERN ROAD CSO	23	5	100
Severn Trent Water	Egginton Brook	DRESDEN CLOSE 20 CSO	7	5	99.7
Severn Trent Water	Cotton Brook	PROVIDENT STREET CSO	21	4	100
Severn Trent Water	Markeaton Brook	MORELEDGE / THORNTREE LANE CSO	11	4	99.7
Severn Trent Water	Markeaton Brook	ST PETERS STREET/EAST STREET CSO	7	3	99.2
Severn Trent Water	Northern Flood Culvert	KEDLESTON ROAD STORM OVERFLOW	2	3	100
Severn Trent Water	Markeaton Brook	VICTORIA STREET/FRIAR GATE JCT CSO	2	1	100
Severn Trent Water	River Derwent	MEADOW ROAD SPS	1	1	100
Severn Trent Water	Cotton Brook	HARRINGTON ST/HOLCOMBE ST CSO	3	0	99.3
Severn Trent Water	Cotton Brook	PEAR TREE ROAD	6	0	99.3
Severn Trent Water	Markeaton Brook	UTTOXETER OLD RD/JUNCTION ST CSO	2	0	100
Severn Trent Water	Markeaton Brook	GREEN LANE / MACKLIN STREET CSO	3	0	97.7
Severn Trent Water	Cotton Brook	SOCIETY PLACE CSO	2	0	100
Severn Trent Water	Cotton Brook	PORTER ROAD/ALMOND ROAD CSO	1	0	99.1
Severn Trent Water	Littleover Brook	ABBEY STREET CSO	1	0	100
Severn Trent Water	Markeaton Brook	PARCEL TERRACE CSO	1	0	100
Severn Trent Water	Markeaton Brook	UTTOXETER NEW ROAD CSO	1	0	100
Severn Trent Water	Littleover Brook	MONK STREET/KING ALFRED STREET CSO	1	0	99.7
Severn Trent Water	Cuttle Brook	CUTTLE BROOK CLOSE CSO	1	0	100
Severn Trent Water	Littleover Brook	WOODS LANE/STOCKBROOK ST JCT CSO	1	0	97.6
Severn Trent Water	River Derwent	DARLEY ABBEY/ALLESTREE SW-STM/EMG	0	0	100
Severn Trent Water	Littleover Brook	WOODS LANE CSO	0	0	100
Severn Trent Water	Cotton Brook	DALE ROAD/BYRON STREET CSO	0	0	98.8
Severn Trent Water	Cotton Brook	PEAR TREE RD/DAIRY HOUSE RD	0	0	100
Severn Trent Water	River Derwent	BRIDGE INN/RAILWAY CROSSING - O/F	0	0	100
Severn Trent Water	Ock Brook	HAWTHORNE AVENUE CSO	0	0	100
Severn Trent Water	Bottle Brook	LITTLE EATON SPS - STM/EMERGENCY OF	0	0	100
Severn Trent Water	Markeaton Brook	QUARNDON - CHURCH ROAD CSO	0	0	100

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.

Analysing sewage pollution by the Water Industry

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