Area of Outstanding Natural Beauty

Nidderdale - 2025 Sewage

Polluted by sewage 7,628 hours in 2025 , monitoring offline 9,068 hours , potential overflows 51 hours

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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 2025

Sewage7,628 hours
Monitoring offline9,068 hours
Potential pollution51 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 - 1,834 hours
Feb - 84 hours
Mar - 0 hours
Apr - 0 hours
May - 41 hours , 136 offline
Jun - 24 hours , 720 offline
Jul - 130 hours , 826 offline
Aug - 1 hours , 1,480 offline
Sept - 640 hours , 1,440 offline
Oct - 593 hours , 51 potential
Nov - 1,763 hours , 1,440 offline
Dec - 2,513 hours , 1,488 offline

Storm overflows in and around Nidderdale

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Yorkshire Water BEN RHYDDING/STW River Wharfe 100 1,136h 44m -
Yorkshire Water DARLEY/STW River Nidd 77 998h 56m -
Yorkshire Water HIRST LANE/CSO Tang Beck 60 785h 43m -
Yorkshire Water BURLEY IN WHARFEDALE/STW River Wharfe 54 649h 23m -
Yorkshire Water PATELEY BRIDGE/STW River Nidd 51 623h 26m -
Yorkshire Water WYVIL CRESCENT/CSO River Wharfe 78 561h 45m -
Yorkshire Water SWINTON MASHAM/NO 2 STW River Burn 63 488h 17m -
Yorkshire Water SUMMERBRIDGE/CSO River Niidd 50 440h 7m -
Yorkshire Water ADDINGHAM/NO 1 SPS/PRELIMINARY TREATMENT-STW/3XDWF OVERFLOW River Wharfe 36 335h 3m -
Yorkshire Water WHEATLEY LANE/2 CSO River Wharfe 50 233h 35m -
Yorkshire Water ADDINGHAM/NO 1 SPS/PRELIMINARY TREATMENT-STW/6XDWF OVERFLOW River Wharfe 51 233h 3m -
Yorkshire Water DACRE BANKS/CSO River Nidd 35 230h 26m -
Yorkshire Water NIDD WALK/CSO River Nidd Via Sws 31 221h 31m -
Yorkshire Water DARLEY/STW River Nidd 29 134h 33m -
Yorkshire Water GREWELTHORPE/CSO Tranmire Goit 49 127h 12m 51 h
Yorkshire Water DARLEY HEAD/CSO Darley Beck 20 124h 3m -
Yorkshire Water PATELEY BRIDGE/STW River Nidd 13 96h 15m -
Yorkshire Water ASKWITH/CSO West Beck 24 80h 5m 82 h
Yorkshire Water GLASSHOUSES BRIDGE/CSO River Nidd 16 40h 32m -
Yorkshire Water BURLEY LODGE/CSO River Wharfe 14 36h 37m -
Yorkshire Water SHOW GROUND/CSO River Nidd 8 30h 4m -
Yorkshire Water BIRSTWITH/NO 2 CSO River Nidd 7 13h 18m -
Yorkshire Water LOW MILL LANE 179/CSO Town Beck 4 7h 19m -
Yorkshire Water Unknown Unknown 0 0h -
Yorkshire Water ELLINGSTRING/CSO Broad Beck 0 0h -
Yorkshire Water WYVILL ROAD/CSO River Wharfe 0 0h 5,296 h
Yorkshire Water GALPHAY/CSO Laver 0 0h 3,688 h
Yorkshire Water KIRKBY MALZEARD/STW Kex Beck 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.