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Chippenham - Live Sewage

Polluted by sewage 3,169 hours in 2026 , monitoring offline 6,594 hours so far..

© OpenStreetMap contributors
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 Chippenham so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

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 - 1,248 hours , 744 offline
Feb - 1,872 hours , 672 offline
Mar - 46 hours , 744 offline
Apr - 2 hours , 720 offline
May - 0 hours , 1,335 offline
Jun - 0 hours , 1,245 offline
Jul - 0 hours , 744 offline
Aug - 0 hours , 389 offline
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Wessex Water COMPTON BASSETT THE POND Abberd Brook 40 858h 8m -
Wessex Water CHIPPENHAM BLACKWELL HAMS STORM TANK River Avon 33 547h 31m 1,116 h
Wessex Water THINGLEY COPPERSHELL LANE STORM TANK Byde Mill Brook/River Avon 33 471h 32m -
Wessex Water COMPTON BASSETT STORM TANK Rivers Brook 28 364h 37m -
Wessex Water LYNEHAM B SITE (MAIN STW) RAF LYNEHAM STORM TANK Springs Watercourse 22 281h 38m -
Wessex Water CALNE STORM TANK River Marden 31 259h 26m -
Wessex Water CHIPPENHAM GASTONS ROAD Hardenhuish Brook 30 112h 44m -
Wessex Water ROYAL WOOTTON BASSETT STORM TANK Hancock'S Water 10 59h 22m -
Wessex Water LACOCK STORM TANK Bristol Avon 14 57h 34m -
Wessex Water CHIPPENHAM HIGH STREET O/S XX River Avon 24 43h 14m -
Wessex Water CALNE MOSSES MILL X River Marden 18 42h 50m -
Wessex Water CALNE INLET River Marden 10 21h 3m -
Wessex Water CHIPPENHAM BRISTOL ROAD Hardenhuish Brook 15 16h 22m -
Wessex Water CHIPPENHAM WESTMEAD River Avon 2 11h 53m -
Wessex Water ROYAL WOOTTON BASSETT NEAR STW Hancock'S Water 7 11h 8m -
Wessex Water CALNE MARDEN HOUSE CULVERT AT REAR River Marden 4 5h 6m -
Wessex Water LACOCK NETHERCOTE HILL Byde Mill Brook 1 2h 56m -
Wessex Water CHIPPENHAM MONKTON PARK OFFICES River Avon 1 1h 52m -
Wessex Water CALNE STRAND / CHURCH STREET River Marden 1 0h 34m -
Wessex Water CHIPPENHAM DALLAS ROAD Hardenhuish Brook 0 0h -
Wessex Water COMPTON BASSETT THE POND Abberd Brook 0 0h -
Wessex Water LACOCK STORM TANK Bristol Avon 0 0h -
Wessex Water CALNE OXFORD ROAD / WOOD STREET River Marden Via Sws 0 0h -
Wessex Water ROYAL WOOTTON BASSETT NEAR STW Hancock'S Water 0 0h -
Wessex Water CALNE STORM TANK River Marden 0 0h -
Wessex Water CALNE MOSSES MILL 1 River Marden 0 0h -
Wessex Water CHIPPENHAM WESTMEAD River Avon 0 0h -
Wessex Water Unknown Unknown 0 0h -
Wessex Water THINGLEY COPPERSHELL LANE STORM TANK Byde Mill Brook/River Avon 0 0h -
Wessex Water THINGLEY COPPERSHELL LANE INLET Byde Mill Brook/River Avon 0 0h -
Wessex Water CALNE MARDEN HOUSE CULVERT AT REAR River Marden 0 0h -
Wessex Water CHIPPENHAM THE IVY River Avon 0 0h -
Wessex Water CALNE MARKET HILL / STRAND River Marden Via Sws 0 0h 46 h
Wessex Water TOCKENHAM INLET Cowage Brook, 0 0h -
Wessex Water CALNE INLET River Marden 0 0h -
Wessex Water THINGLEY COPPERSHELL LANE INLET Byde Mill Brook/River Avon 0 0h -
Wessex Water CHIPPENHAM BLACKWELL HAMS STORM TANK River Avon 0 0h -
Wessex Water CALNE RIVER MARDEN (RIVER BANK) SOUTH MARDEN HOUSE NEW ROAD River Marden 0 0h -
Wessex Water CHIPPENHAM XX LONG CLOSE River Avon Via Sws 0 0h 5,430 h
Wessex Water Unknown Unknown 0 0h -
Wessex Water CALNE RIVER MARDEN (RIVER BANK) SOUTH MARDEN HOUSE NEW ROAD River Marden 0 0h -
Wessex Water TOCKENHAM INLET Cowage Brook, 0 0h -
Wessex Water LYNEHAM B SITE (MAIN STW) RAF LYNEHAM STORM TANK Springs Watercourse 0 0h -
Wessex Water CHIPPENHAM DALLAS ROAD Hardenhuish Brook 0 0h -
Wessex Water CHIPPENHAM GASTONS ROAD Hardenhuish Brook 0 0h -
Wessex Water CALNE MOSSES MILL X River Marden 0 0h -
Wessex Water CHIPPENHAM MONKTON PARK OFFICES River Avon 0 0h -
Wessex Water CALNE STRAND / CHURCH STREET River Marden 0 0h -
Wessex Water CHIPPENHAM COMMONS SLIP River Avon 0 0h -
Wessex Water CHIPPENHAM BLACKWELL HAMS INLET River Avon 0 0h -
Wessex Water LACOCK NETHERCOTE HILL Byde Mill Brook 0 0h -
Wessex Water CALNE MOSSES MILL 1 River Marden 0 0h -
Wessex Water CHIPPENHAM WOOD LANE River Avon 0 0h -
Wessex Water CHIPPENHAM WOOD LANE River Avon 0 0h -
Wessex Water CHIPPENHAM BLACKWELL HAMS INLET River Avon 0 0h -
Wessex Water COMPTON BASSETT STORM TANK Rivers Brook 0 0h -
Wessex Water CHIPPENHAM BRISTOL ROAD Hardenhuish Brook 0 0h -
Wessex Water ROYAL WOOTTON BASSETT STORM TANK Hancock'S Water 0 0h -
Wessex Water CHIPPENHAM COMMONS SLIP River Avon 0 0h -
Wessex Water CALNE OXFORD ROAD / WOOD STREET River Marden Via Sws 0 0h -
Wessex Water Unknown Unknown 0 0h 2 h
Wessex Water CHIPPENHAM HIGH STREET O/S XX River Avon 0 0h -

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.