Area of Outstanding Natural Beauty

Nidderdale - Live Sewage

Polluted by sewage 8,307 hours in 2026 , monitoring offline 23,287 hours , potential overflows 336 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 Nidderdale in 2026

Sewage8,307 hours
Monitoring offline23,287 hours
Potential pollution336 hours
Storm overflows28

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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 - 2,237 hours , 191 potential
Feb - 3,662 hours , 2,016 offline
Mar - 430 hours , 2,232 offline
Apr - 20 hours , 2,160 offline
May - 112 hours , 145 potential
Jun - 0 hours , 2,160 offline
Jul - 0 hours , 2,232 offline
Aug - 273 hours , 2,655 offline
Sept - 385 hours , 2,280 offline
Oct - 915 hours , 2,532 offline
Nov - 268 hours , 1,066 offline

Storm overflows in and around Nidderdale

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Yorkshire Water Unknown Unknown 74 1,541h 16m -
Yorkshire Water WYVIL CRESCENT/CSO River Wharfe 79 754h 47m -
Yorkshire Water SUMMERBRIDGE/CSO River Niidd 45 710h 12m -
Yorkshire Water SWINTON MASHAM/NO 2 STW River Burn 61 704h 3m -
Yorkshire Water BURLEY IN WHARFEDALE/STW River Wharfe 58 687h 27m -
Yorkshire Water HIRST LANE/CSO Tang Beck 41 673h 25m -
Yorkshire Water DARLEY/STW River Nidd 57 668h 2m -
Yorkshire Water PATELEY BRIDGE/STW River Nidd 34 436h 40m -
Yorkshire Water BEN RHYDDING/STW River Wharfe 55 411h 20m -
Yorkshire Water GREWELTHORPE/CSO Tranmire Goit 65 290h 2m -
Yorkshire Water WHEATLEY LANE/2 CSO River Wharfe 39 283h 51m -
Yorkshire Water NIDD WALK/CSO River Nidd Via Sws 22 229h 52m -
Yorkshire Water DARLEY HEAD/CSO Darley Beck 15 196h 56m -
Yorkshire Water ADDINGHAM/NO 1 SPS/PRELIMINARY TREATMENT-STW/6XDWF OVERFLOW River Wharfe 28 187h 59m 521 h
Yorkshire Water ADDINGHAM/NO 1 SPS/PRELIMINARY TREATMENT-STW/3XDWF OVERFLOW River Wharfe 11 113h 33m 858 h
Yorkshire Water PATELEY BRIDGE/STW River Nidd 14 109h 36m 543 h
Yorkshire Water ASKWITH/CSO West Beck 22 105h 43m -
Yorkshire Water DARLEY/STW River Nidd 17 76h 37m -
Yorkshire Water BURLEY LODGE/CSO River Wharfe 9 52h 7m -
Yorkshire Water DACRE BANKS/CSO River Nidd 26 34h 9m -
Yorkshire Water BIRSTWITH/NO 2 CSO River Nidd 5 13h 50m -
Yorkshire Water SHOW GROUND/CSO River Nidd 4 13h 37m -
Yorkshire Water GLASSHOUSES BRIDGE/CSO River Nidd 5 5h 29m 1 h
Yorkshire Water GALPHAY/CSO Laver 2 4h 27m 7,085 h
Yorkshire Water ELLINGSTRING/CSO Broad Beck 7 2h 25m 10 h
Yorkshire Water LOW MILL LANE 179/CSO Town Beck 0 0h -
Yorkshire Water WYVILL ROAD/CSO River Wharfe 0 0h 7,562 h
Yorkshire Water KIRKBY MALZEARD/STW Kex Beck 0 0h 7,041 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

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.