Area of Outstanding Natural Beauty

North Wessex Downs - Live Sewage

Polluted by sewage 18,934 hours in 2026 - That's 2.19 years , monitoring offline 2,859 hours so far..

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

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Totals for North Wessex Downs in 2026

Sewage18,934 hours
Monitoring offline2,859 hours
Potential pollution1 hours
Storm overflows78

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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 - 4,461 hours , 300 offline
Feb - 9,027 hours , 63 offline
Mar - 4,060 hours , 0 potential
Apr - 1,036 hours , 0 potential
May - 322 hours
Jun - 0 hours
Jul - 0 hours , 423 offline
Aug - 0 hours , 1,095 offline
Sept - 8 hours , 184 offline
Oct - 17 hours , 643 offline
Nov - 0 hours , 139 offline

Storm overflows in and around North Wessex Downs

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Thames Water Winterbourne STW Winterbourne Stream 107 2,337h 45m -
Thames Water South Moreton STW Mill Brook 93 1,712h 45m 176 h
Thames Water Marlborough STW Kennet 71 1,548h 30m 254 h
Thames Water Great Bedwyn STW Kennet And Avon Canal 45 1,045h 16m 15 h
Thames Water Wash Water STW Pound Street Brook 49 998h 45m 27 h
Thames Water Hamstead Marshall STW Hamstead Stream 48 952h 45m 144 h
Wessex Water COLLINGBOURNE DUCIS River Bourne 69 882h 56m 1 h
Wessex Water COMPTON BASSETT THE POND Abberd Brook 40 858h 8m 158 h
Wessex Water COATE SPANIELS BRIDGE River Avon 52 840h 16m -
Wessex Water Unknown Unknown 37 762h 38m -
Thames Water Compton STW River Pang 36 728h 30m 893 h
Wessex Water PEWSEY SALISBURY ROAD STORM TANK River Avon 37 723h 58m -
Thames Water Chapel Row STW River Bourne 41 717h 18 h
Thames Water Pangbourne STW River Sul 32 707h 42m -
Thames Water Knights Lane (Ball Hill) SPS Enbourn 37 658h 45m -
Thames Water East Shefford STW River Lambourn 36 516h 45m -
Wessex Water NORTH NEWNTON River Avon 26 475h 20m -
Thames Water Kintbury STW Kennet 22 334h 54m 18 h
Thames Water Blind Mans Gate (Highclere) SPS Penwood Stream 29 321h 45m -
Thames Water Briff Lane (Bucklebury) STW Briff Lane Stream 26 295h 45m 375 h
Wessex Water ALL CANNINGS River Avon 18 280h 34m -
Thames Water East Grafton STW River Dun 16 253h -
Wessex Water CALNE ROUGH LEAZE River Marden 19 226h 14m -
Thames Water Hampstead Norreys STW River Pang 17 198h 45m -
Thames Water Beenham STW Webbs Lane Stream 17 172h 45m 37 h
Wessex Water HORTON HORTON FARM Etchilhampton Water 44 145h 37m -
Wessex Water PEWSEY WILCOT LODGE River Avon 10 107h 31m -
Wessex Water PEWSEY SWAN River Avon 10 63h 40m 324 h
Wessex Water CHIRTON SMALL STREET Unnamed Watercourse 3 26h 20m -
Southern Water Unknown Unknown 4 10h 20m -
Wessex Water MARDEN HIGH STREET River Avon 2 9h 21m -
Thames Water Chisledon storm tanks N/A 1 8h 36m -
Thames Water Chieveley STW Winterbourne Stream 2 7h -
Thames Water London Road (Marlborough) SPS Kennet 3 2h 30m 380 h
Thames Water Draycot Foliat SPS River Ray 2 0h 45m 10 h
Thames Water Ramsbury STW River Kennet 1 0h 30m -
Thames Water East Garston SPS River Lambourn 1 0h 30m -
Wessex Water Unknown Unknown 1 0h 2m -
Wessex Water ALL CANNINGS River Avon 0 0h -
Wessex Water PEWSEY SALISBURY ROAD STORM TANK River Avon 0 0h -
Wessex Water PATNEY WEIR River Avon 0 0h -
Wessex Water Unknown Unknown 0 0h 1 h
Thames Water Winterbourne STW Winterbourne Stream 0 0h -
Thames Water Hampstead Norreys STW River Pang 0 0h -
Wessex Water PEWSEY SWAN River Avon 0 0h -
Thames Water East Grafton STW River Dun 0 0h -
Wessex Water CALNE ROUGH LEAZE River Marden 0 0h -
Southern Water Unknown Unknown 0 0h -
Wessex Water COLLINGBOURNE DUCIS River Bourne 0 0h -
Wessex Water COATE SPANIELS BRIDGE River Avon 0 0h -
Thames Water Wash Water STW Pound Street Brook 0 0h -
Thames Water Marlborough STW Kennet 0 0h -
Wessex Water HORTON HORTON FARM Etchilhampton Water 0 0h -
Thames Water South Moreton STW Mill Brook 0 0h -
Thames Water Hamstead Marshall STW Hamstead Stream 0 0h -
Wessex Water PATNEY WEIR River Avon 0 0h 5 h
Wessex Water COMPTON BASSETT THE POND Abberd Brook 0 0h -
Thames Water Goring STW River Thames 0 0h -
Thames Water Knights Lane (Ball Hill) SPS Enbourn 0 0h -
Thames Water Draycot Foliat SPS River Ray 0 0h -
Thames Water East Shefford STW River Lambourn 0 0h -
Thames Water Chapel Row STW River Bourne 0 0h -
Thames Water East Garston SPS River Lambourn 0 0h -
Thames Water Briff Lane (Bucklebury) STW Briff Lane Stream 0 0h -
Thames Water Blind Mans Gate (Highclere) SPS Penwood Stream 0 0h -
Thames Water Pangbourne STW River Sul 0 0h -
Wessex Water Unknown Unknown 0 0h -
Wessex Water PEWSEY SALISBURY ROAD River Avon 0 0h 18 h
Thames Water Kintbury STW Kennet 0 0h -
Wessex Water NORTH NEWNTON River Avon 0 0h -
Wessex Water PEWSEY WILCOT LODGE River Avon 0 0h -
Thames Water Chisledon storm tanks N/A 0 0h -
Thames Water London Road (Marlborough) SPS Kennet 0 0h -
Thames Water Compton STW River Pang 0 0h -
Wessex Water MARDEN HIGH STREET River Avon 0 0h -
Wessex Water PEWSEY SALISBURY ROAD River Avon 0 0h -
Thames Water Beenham STW Webbs Lane Stream 0 0h -
Wessex Water CHIRTON SMALL STREET Unnamed Watercourse 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.