Ossett and Denby Dale - Live Sewage

Polluted by sewage 5,981 hours in 2026 , monitoring offline 44,094 hours , potential overflows 7,762 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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✔ 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 Ossett and Denby Dale 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 Ossett and Denby Dale in 2026

Sewage5,981 hours
Monitoring offline44,094 hours
Potential pollution7,762 hours
Storm overflows55

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Daily Data

Jan - 1,810 hours , 745 potential
Feb - 3,209 hours , 672 potential
Mar - 395 hours , 1,039 potential
Apr - 7 hours , 720 potential
May - 126 hours , 744 potential
Jun - 0 hours , 720 potential
Jul - 0 hours , 744 potential
Aug - 170 hours , 873 potential
Sept - 18 hours , 864 potential
Oct - 243 hours , 639 potential
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Yorkshire Water ALBION MILLS/CSO River Calder 49 591h 2m -
Yorkshire Water PORTOBELLO/CSO Pugney'S Drain 47 522h 42m -
Yorkshire Water WEST BRETTON/NO 2 STW Bretton Brook 45 422h 14m -
Yorkshire Water HORBURY/STW River Calder 39 407h 18m -
Yorkshire Water BRIDGE ROAD/CSO Smithy Brook 63 395h 46m -
Yorkshire Water GREAT CLIFF/SPS Dennington Beck 28 389h 41m -
Yorkshire Water CUCKSTOOL BOTTOM/CSO River Dearne 42 353h 15m -
Yorkshire Water CLAYTON WEST/STW River Dearne 44 329h 7m -
Yorkshire Water PARK MILL/CSO River Dearne 36 256h 54m -
Yorkshire Water HORBURY BRIDGE/NO 2 CSO River Calder 47 235h 38m 0 h
Yorkshire Water DEWSBURY/STW/3XDWF OVERFLOW River Calder 31 229h 50m -
Yorkshire Water WOOLLEY VILLAGE/STW/3XDWF OVERFLOW Totty Beck 32 222h 30m -
Yorkshire Water SPRINGFIELD LANE/CSO Dean Bottom Dike 35 190h 37m -
Yorkshire Water BIRDS EDGE/CSO River Dearne 13 163h 35m 295 h
Yorkshire Water STANDBRIDGE LANE/CSO Owler Beck 33 162h 46m -
Yorkshire Water BROOMHALL EMLEY/CSO Little Dike 21 162h 42m -
Yorkshire Water HORBURY/STW/6XDWF OVERFLOW River Calder 30 153h 9m 0 h
Yorkshire Water SKELMANTHORPE/CSO Park Gate Dike 25 148h 24m 3 h
Yorkshire Water HEALEY ROAD OSSETT/CSO River Calder 31 114h 43m -
Yorkshire Water BROOMFIELD LANE/NO 2 CSO Out Lane Dyke 10 93h 4m -
Yorkshire Water DEWSBURY/STW/6XDWF OVERFLOW River Calder 10 77h 5m -
Yorkshire Water MONTAGUE STREET/CSO Oakenshaw Beck 14 69h 24m -
Yorkshire Water NETHERTON/CSO Pits Beck Culverted 21 60h 31m 0 h
Yorkshire Water PILDACRE LANE/NO 2 CSO Pildacre Mill Beck 15 57h 16m 6 h
Yorkshire Water LUPSET/CSO Lupset Beck 14 52h 47m 0 h
Yorkshire Water BAPTIST LANE/CSO Spring Mill Beck 21 40h 53m 48 h
Yorkshire Water MANOR ROAD/CSO Range Dike 4 25h 47m -
Yorkshire Water THORNHILL ROAD/CSO Smithy Brook 3 24h 8m 1,818 h
Yorkshire Water CHARLES STREET/NO 2 CSO Old Mill Stream 6 12h 54m -
Yorkshire Water OSSETT TOWNGATE/NO 2 CSO Spring Mill Beck 6 3h 34m -
Yorkshire Water INNFOLD FARM 3/NO 2 CSO Bretton Brook 1 2h 44m -
Yorkshire Water PLEDWICK/CSO Owler Beck Via Surface Wtr Sw 5 2h 15m -
Yorkshire Water THUNDERBRIDGE/NO 2 CSO Shepley Dike 3 1h 56m -
Yorkshire Water AGBRIGG GARAGE/CSO Oakenshaw Beck 3 1h 28m -
Yorkshire Water DAMHILL/NO 2 CSO Shepley Dike 2 1h 22m -
Yorkshire Water LANE HACKINGS GREEN/CSO Thorpe Dike 2 0h 57m 568 h
Yorkshire Water WOOLLEY VILLAGE/STW/6XDWF OVERFLOW Totty Beck 2 0h 33m -
Yorkshire Water BACK LANE/CSO Clvrt Toad Hole Dike 1 0h 29m 857 h
Yorkshire Water CATCH BAR/CSO River Dearne 1 0h 24m -
Yorkshire Water OSSETT WAKEFIELD RD/2 CSO Clvrt Springfield Beck 0 0h -
Yorkshire Water INNFOLD FARM 1/CSO River Dearne 0 0h 6,641 h
Yorkshire Water HORBURY ROAD M1/CSO Lupset Beck 0 0h -
Yorkshire Water XXXFOLD FARM 4/CSO Bretton Brook 0 0h 6,641 h
Yorkshire Water DENBY DALE ROAD/CSO River Calder 0 0h -
Yorkshire Water SWALLOWS NEST/CSO River Calder 0 0h -
Yorkshire Water DOGLEY/CSO Woodsome Beck 0 0h 7,153 h
Yorkshire Water GAWTHORPE MAIN ST/CSO Bushy Beck 0 0h -
Yorkshire Water HAIGH/STW River Dearne 0 0h -
Yorkshire Water WAKEFIELD RD SCISSET/CSO River Dearne 0 0h 7,153 h
Yorkshire Water NEWMILLERDAM/CSO Owler Beck/Newmillerdam 0 0h -
Yorkshire Water SPRING GROVE/CSO River Dearne 0 0h -
Yorkshire Water LOW COMMON/CSO Varies With Outlet 0 0h 231 h
Yorkshire Water LOCK STREET/CSO River Calder 0 0h 7,153 h
Yorkshire Water XXXFOLD FARM 2/CSO Bretton Brook 0 0h 6,641 h
Yorkshire Water CHAPELTHORPE/CSO Chapelthorpe Bank Owler B 0 0h 6,641 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.