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South West Wiltshire - 2025 Sewage

Polluted by sewage 1,700 hours in 2025 , monitoring offline 1,584 hours

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

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in South West Wiltshire 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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Constituencies near South West Wiltshire

Daily Data

Jan - 750 hours , 141 offline
Feb - 359 hours , 56 offline
Mar - 0 hours , 0 offline
Apr - 2 hours , 191 offline
May - 3 hours
Jun - 10 hours
Jul - 2 hours
Aug - 1 hours , 663 offline
Sept - 7 hours , 331 offline
Oct - 11 hours , 197 offline
Nov - 133 hours
Dec - 417 hours , 1 offline
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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Thank you so much to everyone who contributed to the site in 2025 to keep it running. We do rely on your contributions! Developing and running a website costs real money.
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Wessex Water MERE ROOK STREET STORM TANK Shreen Water 18 271 h 44m -
Wessex Water DILTON MARSH INLET Fairbourne Stream 15 158 h 41m 0 h
Wessex Water MERE SHAFTESBURY ROAD Shreen Water 13 142 h 8m -
Wessex Water WESTBURY STORM TANK Bitham Brook/ Bitham Brook 14 117 h 26m -
Wessex Water DILTON MARSH INLET Fairbourne Stream 16 111 h 58m -
Wessex Water WARMINSTER STORM TANK River Wylye 8 105 h 6m -
Wessex Water EDINGTON TINHEAD LOWER BAYNTON ROAD Buckington Drove 15 100 h 50m -
Wessex Water TROWBRIDGE CANAL ROAD River Biss Via Sws 13 75 h 16m -
Wessex Water SOUTHWICK CHANTRY GARDENS Lambrok Stream 8 74 h 55m -
Wessex Water TROWBRIDGE BRADFORD ROAD INLET F/E-River Avon, Cso-River Biss 9 64 h 30m 182 h
Wessex Water WARMINSTER STORM TANK River Wylye 7 60 h 36m -
Wessex Water WESTBURY STORM TANK Bitham Brook/ Bitham Brook 5 49 h 10m 196 h
Wessex Water SOUTHWICK CHANTRY GARDENS Lambrok Stream 5 41 h 33m -
Wessex Water MERE STW ADJ TO Shreen Water 27 38 h 30m -
Wessex Water MERE SHAFTESBURY ROAD Shreen Water 7 36 h 38m -
Wessex Water WARMINSTER CALVESWATER Were Via Sws 17 35 h 40m -
Wessex Water MAIDEN BRADLEY INLET Groundwater Via Infilt System 17 33 h 26m -
Wessex Water WARMINSTER WEYMOUTH STREET R/O XX IN PLEASURE GARDENS NEAR SWIMMING POOL River Wyle Via Were 32 33 h 6m 2 h
Wessex Water MERE ROOK STREET STORM TANK Shreen Water 7 29 h 46m -
Wessex Water WARMINSTER WEYMOUTH STREET R/O XX IN PLEASURE GARDENS NEAR SWIMMING POOL River Wyle Via Were 12 16 h 19m -
Wessex Water WARMINSTER CALVESWATER Were Via Sws 6 15 h -
Wessex Water MERE STW ADJ TO Shreen Water 10 12 h 48m -
Wessex Water TROWBRIDGE CANAL ROAD River Biss Via Sws 6 11 h 20m -
Wessex Water BRATTON TROWBRIDGE ROAD Bitham Brook 5 10 h 54m -
Wessex Water DILTON MARSH IN FIELD BEHIND XXX HIGH STREET Allebourne Brook 5 7 h 30m -
Wessex Water WESTBURY FROGMORE ROAD OPP XX Bitham Brook/ Bitham Brook 6 7 h 2m -
Wessex Water DILTON MARSH IN FIELD BEHIND XXX HIGH STREET Allebourne Brook 2 6 h 54m -
Wessex Water MAIDEN BRADLEY INLET Groundwater Via Infilt System 7 6 h 36m 9 h
Wessex Water BRATTON TROWBRIDGE ROAD Bitham Brook 3 6 h 36m -
Wessex Water WESTBURY FROGMORE ROAD OPP XX Bitham Brook/ Bitham Brook 9 5 h 54m -
Wessex Water EDINGTON TINHEAD LOWER BAYNTON ROAD Buckington Drove 7 3 h 55m -
Wessex Water DILTON MARSH PEN KNAPP Biss Brook 2 3 h 4m -
Wessex Water WESTBURY INLET Bitham Brook/ Bitham Brook 2 2 h 30m -
Wessex Water MAIDEN BRADLEY OFF KINGSTON LANE River Wylye 7 1 h 26m 991 h
Wessex Water TROWBRIDGE STALLARD STREET O/S XX River Biss Via Sws 1 0 h 46m -
Wessex Water TROWBRIDGE STALLARD STREET O/S XX River Biss Via Sws 1 0 h 34m -
Wessex Water WARMINSTER GEORGE ST Were 1 0 h 22m -
Wessex Water WESTBURY ALFRED ST CONSERVATIVE CLUB Bitham Brook 1 0 h 14m -
Wessex Water MAIDEN BRADLEY OFF KINGSTON LANE River Wylye 1 0 h 12m -
Wessex Water TROWBRIDGE ROSECROFT POLEBARN ROAD Paxcroft Brook Via Sws 1 0 h 2m 0 h
Wessex Water DILTON MARSH PEN KNAPP Biss Brook 0 0 h -
Wessex Water NORTH BRADLEY CHURCHLANDS Biss Brook 0 0 h 0 h
Wessex Water WESTBURY WEST END O/S XX Bitham Brook Via Sws 0 0 h -
Wessex Water TROWBRIDGE THE SHIRES MULTI-STOREY CAR PARK/BASEMENT River Biss Via Sws 0 0 h 197 h
Wessex Water MONKTON DEVERILL HINDON ROAD STORM TANK River Wylye 0 0 h -
Wessex Water WESTBURY ALFRED ST CONSERVATIVE CLUB Bitham Brook 0 0 h -
Wessex Water MONKTON DEVERILL HINDON ROAD STORM TANK River Wylye 0 0 h -
Wessex Water CHAPMANSLADE DIVERS BRIDGE Rodden Brook 0 0 h 0 h
Wessex Water MERE GARAGE ADJ TO Shreen Water 0 0 h -
Wessex Water WESTBURY INLET Bitham Brook/ Bitham Brook 0 0 h -
Wessex Water TROWBRIDGE WICKER HILL O/S MANE EVENT HAIRDRESSERS River Biss 0 0 h -
Wessex Water TROWBRIDGE ROSECROFT POLEBARN ROAD Paxcroft Brook Via Sws 0 0 h -
Wessex Water TROWBRIDGE BRADFORD ROAD INLET F/E-River Avon, Cso-River Biss 0 0 h -
Wessex Water TROWBRIDGE THE SHIRES MULTI-STOREY CAR PARK/BASEMENT River Biss Via Sws 0 0 h -
Wessex Water Unknown Unknown 0 0 h -
Wessex Water TROWBRIDGE WICKER HILL O/S MANE EVENT HAIRDRESSERS River Biss 0 0 h -
Wessex Water WESTBURY WEST END O/S XX Bitham Brook Via Sws 0 0 h -
Wessex Water NORTH BRADLEY CHURCHLANDS Biss Brook 0 0 h -
Wessex Water WARMINSTER GEORGE ST Were 0 0 h -
Wessex Water CHAPMANSLADE DIVERS BRIDGE Rodden Brook 0 0 h 4 h
Wessex Water Unknown Unknown 0 0 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.

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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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