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North East Somerset and Hanham

Polluted by sewage 1,380 times in 2025 lasting 10,405 hours - That's 1.2 years!

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Live data for North East Somerset and Hanham in 2026

So far this year (as of 15 Aug 2026, 19:46) there has been 11,187 hours of sewage overflows, from 94 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s - that's 1.29 years!

Totals for North East Somerset and Hanham in 2025

43 Sites polluted by Wessex Water
1,380 sewage dumps
10,405 hours duration
That's 1.2 years. On average 3.8 times a day

Change Over Time

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Constituencies near North East Somerset and Hanham

Waterways in North East Somerset and Hanham

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Pollution Summary 2025

Here are all the reported sewage overflow totals for North East Somerset and Hanham 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 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 %
Wessex Water River Chew CHEW STOKE WATEWATER TREATMENT WORK 139 2,528 100
Wessex Water River Chew EAST HARPTREE WRC 99 1,283 100
Wessex Water Congresbury Yeo, Lake UBLEY WATER RECYCLING CENTRE 50 945 99.8
Wessex Water River Avon BATH (SALTFORD) WRC 46 924 100
Wessex Water Cam Brook PAULTON WASTEWATER TREATMENT WORKS 57 843 100
Wessex Water Conygre Brook FARMBOROUGH WWTW 44 756 100
Wessex Water River Chew COMPTON DANDO SEWAGE PUMPING STATIO 39 527 100
Wessex Water River Avon KEYNSHAM WASTEWATER TREATMENT WORKS 27 255 100
Wessex Water Cam Brook TEMPLE BRIDGE PUMPING STATION 45 236 99.4
Wessex Water Bathford Brook COMPTON DANDO WWTW 44 225 100
Wessex Water River Avon WILLSBRIDGE COMBINED SEWER OVERFLOW 45 221 100
Wessex Water Cam Brook GOOSARD BRIDGE PS 47 206 100
Wessex Water River Chew KEYNSHAM HIGH LEVEL PS 43 132 100
Wessex Water Cam Brook CLUTTON PS 28 119 100
Wessex Water River Chew BISHOP SUTTON PUMPING STATION 62 117 100
Wessex Water Cam Brook HINTON BLEWETT WRC 43 113 100
Wessex Water Corston Brook CORSTON PUMPING STATION 29 98 100
Wessex Water Winford Brook BATTLE LANE CSO 25 93 100
Wessex Water River Chew STANTON DREW WRC 11 78 99.8
Wessex Water Cam Brook RADFORD HILL CSO 30 75 100
Wessex Water River Chew CHEW STOKE PUMPING STATION 50 74 100
Wessex Water River Avon POLLY BARNES HILL CSO 57 73 100
Wessex Water River Chew KEYNSHAM LOW LEVEL PUMPING STATION 8 66 100
Wessex Water Cam Brook BRISTOL ROAD CSO 21 60 100
Wessex Water River Boyd CHURCH ROAD PUMPING STATION 10 53 100
Wessex Water River Avon Via Sws MEAD LANE PUMPING STATION 6 52 100
Wessex Water River Chew CHEW MAGNA PS 14 49 100
Wessex Water River Avon THE HAMS PUMPING STATION 50 46 100
Wessex Water R Avon Via S/Water Sewer SALTFORD HIGH STREET CSO 38 37 97.5
Wessex Water River Avon LOWER HANHAM ROAD CSO 26 18 100
Wessex Water Cam Brook MAYPOLE FARM CSO 22 15 100
Wessex Water River Avon BEECHWOOD AVENUE CSO 23 13 100
Wessex Water Cam Brook HALLATROW S P STN 7 12 100
Wessex Water River Avon Via Sws CENTRAL AVENUE COMBINED SEWER OF 15 9 96.9
Wessex Water River Avon ANSTEY'S RD CSO 17 9 100
Wessex Water Charlton Bottom Via Sws CHARLTON ROAD CSO 7 7 100
Wessex Water Charlton Bottom Via Sws BRISTOL ROAD CSO 24 6 99.8
Wessex Water River Chew STANTON DREW PUMPING STATION 4 4 100
Wessex Water River Avon Via Sws WICKHOUSE FARM CSO 2 3 100
Wessex Water River Avon BATH ROAD CSO 9 2 94.7
Wessex Water River Avon FOOTSHILL ROAD CSO 7 1 100
Wessex Water Siston Brook Via Sws HILL STREET COMBINED SEWER OVERFLOW 6 0 100
Wessex Water Siston Brook MILL LANE COMBINED SEWER OVERFLOW 4 0 99.8
Wessex Water River Avon HANHAM HIGH STREET CSO 0 0 100
Wessex Water Siston Brook ULLSWATER CLOSE PUMPING STATION 0 0 99.6
Wessex Water Siston Brook WILLSBRIDGE PUMPING STATION 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.

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Analysing sewage pollution by the Water Industry

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