Top of the Poops | Constituency Sewage Map | Bristol North West

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Live data for Bristol North West in 2026

So far this year (as of 15 Sept 2026, 06:46) there has been 1,230 hours of sewage overflows, from 168 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Sewage without rain in Bristol North West

On 6 occasions since December 2024, no rain fell anywhere in Bristol North West for days — and its CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s discharged anyway.

29 Apr 2026 1 at once · 4h 23 Sept 2025 1 at once · 3h 11 May 2025 5 at once · 2h

Totals for Bristol North West in 2025

53 Sites polluted by Wessex Water

1,170 sewage dumps

2,623 hours duration

That's 3.64 months. On average 3.2 times a day

Change Over Time

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Sewage pollution map of Bristol North West: 1,170 spills in 2025, lasting 2,623 hours, by Wessex Water

Sewage pollution map of Bristol North West: 1,170 spills in 2025, lasting 2,623 hours, by Wessex Water

Constituencies near Bristol North West

Waterways in Bristol North West

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Bristol North West 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 1 of the total 59 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 %
Wessex Water	Severn Estuary	AVONMOUTH STW	67	865	100
Wessex Water	River Avon Via Sws	THE PORTWAY CSO	26	195	100
Wessex Water	Horfield Brook Via Sws	FILTON AVENUE CSO	80	194	100
Wessex Water	River Trym Via Sws	WELLINGTON HILL WEST CSO	45	152	100
Wessex Water	River Avon	WEST TOWN ROAD PUMPING STATION	55	131	100
Wessex Water	River Avon	WESTBURY ON TRYM STORM OVERFLOW	36	108	100
Wessex Water	River Trym	GLENWOOD ROAD CSO	39	93	100
Wessex Water	River Trym Via Sws	STOKE LANE COMBINED SEWER OVERFLOW	56	83	100
Wessex Water	River Trym Via Sws	BISHOPTHORPE ROAD CSO	52	74	100
Wessex Water	River Trym Via Sws	CHERINGTON ROAD CSO	29	72	49.2
Wessex Water	River Avon	WEST TOWN ROAD PUMPING STATION	14	65	100
Wessex Water	River Trym	TRYM ROAD CSO	30	62	100
Wessex Water	River Avon Via Sws	LOWER HIGH STREET CSO	13	59	98.5
Wessex Water	River Trym Via Sws	HENLEAZE ROAD CSO	30	57	53.2
Wessex Water	River Trym Via Sws	11 NEWCOMBE ROAD CSO	27	55	100
Wessex Water	River Avon Via Sws	PORTWAY COMBINED SEWER OVERFLOW	47	44	100
Wessex Water	River Trym	MERLIN CLOSE CSO	26	36	100
Wessex Water	River Trym Via Sws	224 HENLEAZE ROAD CSO	38	36	100
Wessex Water	River Severn Via Sws	QUEEN STREET CSO	6	21	99.8
Wessex Water	Bristol Avon Via Sws Estuarine	GLOUCESTER ROAD CSO	32	18	100
Wessex Water	River Avon Via Sws	AVONMOUTH ROAD CSO	36	18	100
Wessex Water	River Trym Via Sws	DRUID WOOD COMBINED SEWER OVERFLOW	19	16	100
Wessex Water	River Trym Via Sws	ABBEY ROAD COMBINED SEWER OVERFLOW	28	14	100
Wessex Water	River Trym Via Sws	WESTBURY ROAD COMBINED SEWER OF	23	11	100
Wessex Water	Bristol Avon	AVONMOUTH 'B' PUMPING STATION	5	11	100
Wessex Water	River Trym Via Sws	HENLEAZE ROAD CSO	15	11	100
Wessex Water	River Severn Estuary Via Sws	THIRD WAY CSO	2	11	89
Wessex Water	River Trym Via Sws	WESTBURY ROAD COMBINED SEWER OF	10	10	100
Wessex Water	River Trym Via Sws	250 HENLEAZE ROAD CSO	16	8	100
Wessex Water	River Avon Via Sws	HUDDS VALE ROAD CSO	28	8	100
Wessex Water	River Trym Via Sws	SHIREHAMPTON ROAD CSO	29	7	98.7
Wessex Water	River Avon	BRIDGE VALLEY ROAD CSO	17	7	100
Wessex Water	River Avon Via Sws	5 SPRINGFIELD AVENUE CSO	24	7	98.3
Wessex Water	River Trym Via Sws	175 WELLINGTON HILL WEST CSO	11	5	100
Wessex Water	River Trym Via Sws	EASTFIELD ROAD CSO	24	5	100
Wessex Water	Cranbrook Via Sws	DEVONSHIRE ROAD CSO	23	5	100
Wessex Water	Boiling Wells Lane Stream	MULLER ROAD ALLOTMENTS CSO	11	4	100
Wessex Water	River Avon Via Sws	SEA MILLS LANE (PORTWAY BRIDGE) CSO	4	4	100
Wessex Water	River Avon Via Sws	OLD PARK RD COMBINED SEWER OVERFLOW	19	4	100
Wessex Water	River Avon	AVONMOUTH WAY COMBINED SEWER OF	3	4	76.8
Wessex Water	River Avon Via Sws	30 STATION ROAD CSO	12	2	92.3
Wessex Water	River Avon Via Sws	7 SPRINGFIELD AVENUE CSO	12	2	98.5
Wessex Water	River Trym Via Sws	LAWRENCE GROVE CSO	6	2	100
Wessex Water	River Avon	WATLING WAY COMBINED SEWER OVERFLOW	5	1	100
Wessex Water	Cranbrook	82 HOWARD ROAD CSO	7	1	99.6
Wessex Water	Cranbrook Via Sws	1 HOWARD ROAD CSO	6	1	100
Wessex Water	River Trym Via Sws	HARBURY ROAD COMBINED SEWER OF	10	0	97.9
Wessex Water	Tidal Avon	O/S 82 CHARLTON ROAD CSO	5	0	100
Wessex Water	River Trym Via Sws	OAKWOOD ROAD CSO	5	0	100
Wessex Water	River Trym Via Sw	ROCKSIDE DRIVE CSO	4	0	100
Wessex Water	River Avon Via Sws	SEA MILLS LANE (2) CSO	1	0	96
Wessex Water	River Trym Via Sws	HENLEAZE PARK DRIVE CSO	1	0	100
Wessex Water	River Avon	LAMPLIGHTERS SEWAGE PUMPING STATION	1	0	100
Wessex Water	River Trym Via Sws	147 WELLINGTON HILL WEST NO2 CSO	0	0	90.5
Wessex Water	River Trym Via Sws	147 WELLINGTON HILL WEST NO2 CSO	0	0	100
Wessex Water	Bristol Avon	201 GLOUCESTER ROAD CSO	0	0	100
Wessex Water	River Trym Via Sws	HARBURY ROAD CSO	0	0	96.5
Wessex Water	River Trym Via Sws	HENBURY ROAD CSO	0	0	98.5
Wessex Water	River Avon Via Sws	LOWER HIGH STREET 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

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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