Sheffield Hallam - Live Sewage

Polluted by sewage 1,411 hours in 2026 , monitoring offline 21,238 hours , potential overflows 229 hours so far..

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

Which Year?

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✔ means we have live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Sheffield Hallam so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

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.

Totals for Sheffield Hallam in 2026

Sewage1,411 hours
Monitoring offline21,238 hours
Potential pollution229 hours
Storm overflows18

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Daily Data

Jan - 473 hours , 0 potential
Feb - 619 hours , 2,016 offline
Mar - 61 hours , 2,232 offline
Apr - 0 hours , 2,160 offline
May - 20 hours , 2,232 offline
Jun - 0 hours , 2,160 offline
Jul - 0 hours , 2,232 offline
Aug - 137 hours , 122 potential
Sept - 12 hours , 106 potential
Oct - 87 hours , 1,815 offline
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Yorkshire Water MILLHOUSES PARK/CSO/RETENTION/NO 1 COMPARTMENT River Sheaf 39 348h 16m 0 h
Yorkshire Water RIVELIN VALLEY 3/CSO River Rivelin 52 344h 38m -
Yorkshire Water HANGINGWATER ROAD/CSO Porter Brook 36 175h 46m 506 h
Yorkshire Water MILLHOUSES PARK/CSO/RETENTION/NO 2 COMPARTMENT River Sheaf 18 140h 10m -
Yorkshire Water LANGSETT ROAD/CSO River Don 25 136h 23m -
Yorkshire Water GLEN BRIDGE/CSO River Rivelin 19 67h 18m -
Yorkshire Water STANNINGTON ROAD/NO 2 CSO Not Matched In Ea Consents Database 27 44h 59m -
Yorkshire Water WHITELEY WOODS/CSO Porter Brook 15 42h 40m -
Yorkshire Water SLAYLEIGH LANE/CSO Porter Brook 18 36h 21m -
Yorkshire Water BROOKHOUSE HILL/CSO Porter Brook 8 35h 45m -
Yorkshire Water ROCHESTER ROAD/CSO Black Brook 6 22h 33m -
Yorkshire Water ENDCLIFFE PARK/CSO Porter Brook 8 13h 42m -
Yorkshire Water RIVERDALE ROAD/NO 2 CSO Oak Brook 3 1h 33m -
Yorkshire Water SNAITHING LANE/CSO Porter Brook 1 0h 45m -
Yorkshire Water STUMPERLOWE CRES ROAD/CSO Porter Brook 2 0h 28m -
Yorkshire Water BELGRAVE ROAD WEST/CSO Porter Brook 0 0h 7,157 h
Yorkshire Water SNAITHING PARK ROAD/CSO Porter Brook 0 0h 6,645 h
Yorkshire Water Unknown Unknown 0 0h 7,157 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.