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Area of Outstanding Natural Beauty

Cranborne Chase & West Wiltshire Downs - 2025 Sewage

Polluted by sewage 5,660 hours in 2025 , monitoring offline 1,179 hours , potential overflows 181 hours

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

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Totals for 2025

Sewage5,660 hours
Monitoring offline1,179 hours
Potential pollution181 hours
Storm overflows33

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Daily Data - when it rained, and when they spilled

Square = rainfall none → heavy
Drop = sewage minutes → all day
Potential pollution Monitoring offline
Jan - 1,739 hours , 1 offline
Feb - 2,148 hours , 12 potential
Mar - 1,081 hours , 169 potential
Apr - 1 hours , 9 offline
May - 0 hours
Jun - 7 hours
Jul - 0 hours
Aug - 2 hours , 663 offline
Sept - 18 hours , 333 offline
Oct - 26 hours
Nov - 121 hours
Dec - 512 hours , 100 offline

Storm overflows in and around Cranborne Chase & West Wiltshire Downs

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Wessex Water BARFORD ST MARTIN BURCOMBE STORM TANK River Nadder 78 1,551h 55m 0 h
Wessex Water HANGING LANGFORD River Wylye Via A Reed Bed 80 1,504h 18m 240 h
Wessex Water FOVANT STORM TANK Fovant Brook 52 936h 19m 0 h
Wessex Water CRANBORNE HIGHER HOLWELL STORM TANK River Crane 30 537h 37m 12 h
Wessex Water Unknown Unknown 34 420h 29m -
Wessex Water FOVANT STORM TANK Fovant Brook 27 333h 20m -
Wessex Water CHILMARK River Nadder 6 87h 34m -
Wessex Water HINDON INLET Groundwater Via Infilt System 42 69h 51m -
Wessex Water TISBURY NADDER CLOSE PLAYING FIELDS River Nadder Via Sws 18 54h 23m -
Wessex Water BARFORD ST MARTIN River Nadder 4 41h 31m -
Wessex Water MAIDEN BRADLEY INLET Groundwater Via Infilt System 17 33h 26m -
Wessex Water HINDON INLET Groundwater Via Infilt System 12 21h 58m -
Wessex Water SEMLEY INLET River Sem 10 21h 35m -
Wessex Water SEMLEY INLET River Sem 8 16h 16m -
Wessex Water TISBURY NADDER CLOSE PLAYING FIELDS River Nadder Via Sws 8 13h 52m -
Wessex Water MAIDEN BRADLEY INLET Groundwater Via Infilt System 7 6h 36m 9 h
Wessex Water SUTTON WALDRON Fontmell Brook 2 3h -
Wessex Water BARFORD ST MARTIN BURCOMBE STORM TANK River Nadder 1 1h 38m -
Wessex Water HINDON THE DENE River Nadder 2 1h 30m -
Wessex Water MAIDEN BRADLEY OFF KINGSTON LANE River Wylye 7 1h 26m 991 h
Wessex Water Unknown Unknown 2 1h 7m -
Wessex Water HINDON THE DENE River Nadder 1 0h 14m -
Wessex Water MAIDEN BRADLEY OFF KINGSTON LANE River Wylye 1 0h 12m -
Wessex Water PENSELWOOD PENN MILL River Stour 0 0h -
Wessex Water CRANBORNE HIGHER HOLWELL STORM TANK River Crane 0 0h 100 h
Wessex Water SUTTON WALDRON Fontmell Brook 0 0h -
Wessex Water Unknown Unknown 0 0h -
Wessex Water HANGING LANGFORD River Wylye Via A Reed Bed 0 0h -
Wessex Water CHILMARK River Nadder 0 0h -
Wessex Water MONKTON DEVERILL HINDON ROAD STORM TANK River Wylye 0 0h -
Wessex Water PENSELWOOD PENN MILL River Stour 0 0h 6 h
Wessex Water MONKTON DEVERILL HINDON ROAD STORM TANK River Wylye 0 0h -
Wessex Water BARFORD ST MARTIN River Nadder 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

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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.