It's a Dirty Business

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North Somerset - 2025 Sewage

Polluted by sewage 2,279 hours in 2025 , monitoring offline 3,648 hours , potential overflows 445 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

Which Year?

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✔ means we have live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in North Somerset for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Daily Data

Jan - 394 hours
Feb - 130 hours
Mar - 0 hours
Apr - 0 hours
May - 1 hours
Jun - 2 hours
Jul - 4 hours , 123 potential
Aug - 1 hours , 321 potential
Sept - 99 hours , 1,007 offline
Oct - 61 hours , 744 offline
Nov - 392 hours , 664 offline
Dec - 1,190 hours
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Wessex Water BUTCOMBE STORM TANK Congresbury Yeo And Butcombe 23 470 h 58m -
Wessex Water PORTBURY WHARF THE DROVE PORTBURY INLET Unknown 40 425 h 43m -
Wessex Water WRINGTON Congresbury Yeo 18 269 h 8m -
Wessex Water PORTBURY WHARF THE DROVE PORTBURY INLET Unknown 30 221 h 21m 10 h
Wessex Water BUTCOMBE STORM TANK Congresbury Yeo And Butcombe 9 130 h 15m -
Wessex Water KINGSTON SEYMOUR Unknown 15 110 h 52m -
Wessex Water WRINGTON Congresbury Yeo 8 86 h 15m -
Wessex Water PORTISHEAD BLACK NORE (NAUTICAL SCHOOL) Severn Estuary 10 72 h 1m -
Wessex Water PORTISHEAD BLACK NORE (NAUTICAL SCHOOL) Severn Estuary 19 49 h 33m -
Wessex Water PORTISHEAD PORTBURY DITCH OFF HARBOUR RD Portbury Ditch 10 49 h 2m -
Wessex Water PORTISHEAD HILLSIDE ROAD REDCLIFF BAY River Severn 11 44 h 46m -
Wessex Water PORTISHEAD PORTBURY DITCH OFF HARBOUR RD Portbury Ditch 7 40 h 58m 749 h
Wessex Water KINGSTON SEYMOUR Unknown 9 38 h 41m -
Wessex Water PORTISHEAD TOWN HARBOUR ROAD Portbury Ditch, 7 36 h 58m -
Wessex Water PORTISHEAD HILLSIDE ROAD REDCLIFF BAY River Severn 23 32 h 32m -
Wessex Water WRINGTON WILTONS INLET Congressbury Yeo 5 31 h 44m -
Wessex Water PORTISHEAD TOWN HARBOUR ROAD Portbury Ditch, 8 28 h 48m -
Wessex Water CLEVEDON LADYE BAY Bristol Channel 10 21 h 5m -
Wessex Water Unknown Unknown 4 20 h 10m -
Wessex Water CLEVEDON MAIN Bristol Channel 6 17 h 13m -
Wessex Water CLEVEDON LADYE BAY Bristol Channel 13 16 h 10m -
Wessex Water PORTISHEAD LAKE GROUNDS Estuary 5 12 h 52m -
Wessex Water PORTISHEAD COOMBE/SLADE ROAD JUNCTION Portbury Ditch 16 9 h 34m -
Wessex Water PORTISHEAD HIGH STREET NR BUILDERS YARD Unknown 13 8 h 18m 612 h
Wessex Water PORTISHEAD HIGH STREET NR BUILDERS YARD Unknown 4 6 h 42m -
Wessex Water WRINGTON WILTONS INLET Congressbury Yeo 1 6 h 4m -
Wessex Water PORTISHEAD LAKE GROUNDS Estuary 4 4 h 44m -
Wessex Water Unknown Unknown 5 4 h 40m -
Wessex Water PORTISHEAD SLADE ROAD O/S XX Portbury Ditch 1 2 h 54m -
Wessex Water CLEVEDON MAIN Bristol Channel 4 2 h 53m -
Wessex Water PORTISHEAD COOMBE/SLADE ROAD JUNCTION Portbury Ditch 5 1 h 58m -
Wessex Water PORTISHEAD POACHER HOTEL (ANCHOR HOTEL) Unknown 2 1 h 42m 0 h
Wessex Water PORTISHEAD SLADE ROAD O/S XX Portbury Ditch 3 1 h 24m -
Wessex Water CLEVEDON THE BEACH Bristol Channel 1 1 h 22m -
Wessex Water CLEVEDON OLD STREET O/S XX Land Yeo 1 0 h 12m -
Wessex Water CLEVEDON PARNELL ROAD Land Yeo 1 0 h 10m -
Wessex Water CLEVEDON THE BEACH Bristol Channel 1 0 h 6m -
Wessex Water PORTBURY DROVE Portbury Drove Rhyne 0 0 h -
Wessex Water PORTISHEAD POACHER HOTEL (ANCHOR HOTEL) Unknown 0 0 h -
Wessex Water BRISTOL OLD MEAD WALK NO X . Colliters Brook Via Sws 0 0 h -
Wessex Water CLEVEDON MARINE PARADE Severn Estuary 0 0 h -
Wessex Water BRISTOL OLD MEAD WALK NO X . Colliters Brook Via Sws 0 0 h 2,240 h
Wessex Water PORTBURY DROVE Portbury Drove Rhyne 0 0 h -
Wessex Water CLEVEDON PARNELL ROAD Land Yeo 0 0 h -
Wessex Water PORTISHEAD BRAMPTON WAY Portbury Via Sws 0 0 h -
Wessex Water CLEVEDON MARINE PARADE Severn Estuary 0 0 h 479 h

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.