Bristol North West was polluted by sewage 1,665 times in 2024
lasting 5,629 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
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✔ means we have experimental daily data since 2023
Live data for Bristol North West in 2025
So far this year (as of Apr 11, 2025, 5:30 PM) there has been 691 hours of sewage overflows
Totals for Bristol North West in 2024
53 Sites polluted by Wessex Water
1,665 sewage dumps
5,629 h duration
That's 7.82 months. On average 4.6 times a day
Change Over Time
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Constituencies near Bristol North West
Waterways in Bristol North West
Daily Data
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Bristol North West, 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 Bristol North West 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 59 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 %
Wessex Water Severn Estuary AVONMOUTH STW 141 2,123 99.7
Wessex Water River Avon Via Sws THE PORTWAY CSO 58 619 100
Wessex Water Horfield Brook Via Sws FILTON AVENUE CSO 111 351 99.4
Wessex Water River Avon Via Sws LOWER HIGH STREET CSO 37 249 99.8
Wessex Water River Trym Via Sws WELLINGTON HILL WEST CSO 56 241 100
Wessex Water River Avon WEST TOWN ROAD PUMPING STATION 76 202 99.9
Wessex Water River Trym Via Sws CHERINGTON ROAD CSO 49 165 90.3
Wessex Water River Avon WESTBURY ON TRYM STORM OVERFLOW 49 165 99.9
Wessex Water River Trym GLENWOOD ROAD CSO 50 163 100
Wessex Water River Avon Via Sws PORTWAY COMBINED SEWER OVERFLOW 85 147 99.5
Wessex Water River Trym Via Sws STOKE LANE COMBINED SEWER OVERFLOW 68 142 100
Wessex Water River Trym Via Sws BISHOPTHORPE ROAD CSO 65 132 100
Wessex Water River Avon WEST TOWN ROAD PUMPING STATION 28 105 100
Wessex Water River Trym Via Sws HENLEAZE ROAD CSO 54 103 91.1
Wessex Water River Trym TRYM ROAD CSO 38 97 100
Wessex Water River Trym Via Sws 11 NEWCOMBE ROAD CSO 40 79 100
Wessex Water River Avon AVONMOUTH WAY COMBINED SEWER OF 18 73 86.3
Wessex Water River Severn Estuary Via Sws THIRD WAY CSO 20 68 99.2
Wessex Water River Trym MERLIN CLOSE CSO 35 47 100
Wessex Water River Trym Via Sws 224 HENLEAZE ROAD CSO 37 41 97.2
Wessex Water River Trym Via Sws DRUID WOOD COMBINED SEWER OVERFLOW 28 39 99.3
Wessex Water Bristol Avon Via Sws Estuarine GLOUCESTER ROAD CSO 33 37 94.9
Wessex Water River Severn Via Sws QUEEN STREET CSO 12 33 99.8
Wessex Water River Avon Via Sws HUDDS VALE ROAD CSO 34 22 100
Wessex Water River Avon Via Sws AVONMOUTH ROAD CSO 47 20 100
Wessex Water Boiling Wells Lane Stream MULLER ROAD ALLOTMENTS CSO 22 19 100
Wessex Water River Avon BRIDGE VALLEY ROAD CSO 26 15 99.3
Wessex Water River Trym Via Sws ABBEY ROAD COMBINED SEWER OVERFLOW 31 14 98.6
Wessex Water River Trym Via Sws WESTBURY ROAD COMBINED SEWER OF 18 14 100
Wessex Water River Trym Via Sws WESTBURY ROAD COMBINED SEWER OF 31 11 100
Wessex Water Bristol Avon AVONMOUTH 'B' PUMPING STATION 4 11 99.1
Wessex Water River Trym Via Sws 250 HENLEAZE ROAD CSO 22 9 99.2
Wessex Water River Trym Via Sws HENLEAZE ROAD CSO 25 8 99.2
Wessex Water River Avon Via Sws 5 SPRINGFIELD AVENUE CSO 32 7 96.9
Wessex Water River Trym Via Sws SHIREHAMPTON ROAD CSO 28 7 92.8
Wessex Water Cranbrook Via Sws DEVONSHIRE ROAD CSO 30 5 100
Wessex Water River Avon Via Sws OLD PARK RD COMBINED SEWER OVERFLOW 25 4 93.6
Wessex Water River Trym Via Sws EASTFIELD ROAD CSO 22 3 99.4
Wessex Water River Avon Via Sws 30 STATION ROAD CSO 18 3 96
Wessex Water River Avon Via Sws SEA MILLS LANE (2) CSO 3 3 97
Wessex Water River Avon Via Sws 7 SPRINGFIELD AVENUE CSO 16 2 99
Wessex Water River Avon Via Sws SEA MILLS LANE (PORTWAY BRIDGE) CSO 1 1 73.8
Wessex Water Tidal Avon O/S 82 CHARLTON ROAD CSO 7 1 99.3
Wessex Water Cranbrook 82 HOWARD ROAD CSO 4 1 99.5
Wessex Water River Trym Via Sws 175 WELLINGTON HILL WEST CSO 6 1 81
Wessex Water River Avon WATLING WAY COMBINED SEWER OVERFLOW 7 1 87
Wessex Water River Trym Via Sws HARBURY ROAD COMBINED SEWER OF 7 0 99.7
Wessex Water River Trym Via Sws LAWRENCE GROVE CSO 2 0 99.1
Wessex Water Cranbrook Via Sws 1 HOWARD ROAD CSO 2 0 100
Wessex Water River Avon LAMPLIGHTERS SEWAGE PUMPING STATION 1 0 98.9
Wessex Water River Trym Via Sws HARBURY ROAD CSO 3 0 99.1
Wessex Water River Trym Via Sw ROCKSIDE DRIVE CSO 2 0 99.1
Wessex Water River Trym Via Sws OAKWOOD ROAD CSO 1 0 97.8
Wessex Water Bristol Avon 201 GLOUCESTER ROAD CSO 0 0 99.1
Wessex Water River Trym Via Sws HENLEAZE PARK DRIVE CSO 0 0 100
Wessex Water River Trym Via Sws 147 WELLINGTON HILL WEST NO2 CSO 0 0 99.4
Wessex Water River Trym Via Sws 147 WELLINGTON HILL WEST NO2 CSO 0 0 99.3
Wessex Water River Avon Via Sws LOWER HIGH STREET CSO 0 0 99.7
Wessex Water River Trym Via Sws HENBURY ROAD CSO 0 0 99.7

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.

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