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Ossett and Denby Dale was polluted by sewage 1,930 times in 2023
lasting 13,601 hours - that's 1.57 years!
- but monitoring was disabled in some locations, so could be more

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Ossett and Denby Dale in 2023
44 Sites polluted by Yorkshire Water
1,930 sewage dumps
13,601 h duration
That's 1.57 years! On average 5.3 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Ossett and Denby Dale in 2023. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency 1 of the total 50 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Yorkshire Water River Calder HORBURY (DUDFLEET) STW 219 2,447 98.5
Yorkshire Water Bretton Brook WEST BRETTON STW 120 1,615 99.8
Yorkshire Water River Dearne CLAYTON WEST WWTW 111 1,386 100
Yorkshire Water Totty Beck WOOLLEY STW 136 1,243 100
Yorkshire Water River Calder MITCHELL LAITHES WWTW 62 1,032 12.45
Yorkshire Water River Calder ALBION MILLS CSO 84 703 100
Yorkshire Water Smithy Brook BRIDGE ROAD CSO 113 553 81.7
Yorkshire Water River Dearne CUCKSTOOL BOTTOM CSO 79 518 99.8
Yorkshire Water Dean Bottom Dike SPRINGFIELD LANE CSO 74 447 65.6
Yorkshire Water River Dearne PARK MILL CSO 71 429 100
Yorkshire Water River Calder HORBURY BRIDGE SPS 98 421 97
Yorkshire Water Shepley Dike DAMHILL NO 2 CSO 63 347 97.5
Yorkshire Water River Calder OSSETT SPA SPS AND STORM TANKS 41 306 100
Yorkshire Water River Calder HEALEY ROAD OSSETT CSO 79 284 99.5
Yorkshire Water Owler Beck STANDBRIDGE LANE CSO 86 263 100
Yorkshire Water Park Gate Dike SKELMANTHORPE CSO 35 223 90
Yorkshire Water Pugney'S Drain PORTOBELLO SPS 41 219 99.9
Yorkshire Water Little Dike BROOMHILL EMLEY CSO 42 216 99.7
Yorkshire Water Out Lane Dyke BROOMFIELD LANE NO 2 CSO 47 213 100
Yorkshire Water Pildacre Mill Beck PILDACRE LANE CSO 50 127 99.9
Yorkshire Water Range Dike SPRINGFIELD LANE CSO 10 103 99.9
Yorkshire Water River Dearne HAIGH STW 35 90 99.9
Yorkshire Water Oakenshaw Beck MONTAGUE STREET CSO 33 88 100
Yorkshire Water Spring Mill Beck BAPTISTS LANE CSO 40 72 79.9
Yorkshire Water Old Mill Stream CHARLES STREET NO 2 CSO 18 48 100
Yorkshire Water Dennington Beck GREAT CLIFF PS & STORM TANK 12 29 49.95
Yorkshire Water Shepley Dike THUNDERBRIDGE NO 2 CSO 11 27 99.9
Yorkshire Water Oakenshaw Beck AGBRIGG GARAGE CSO 17 26 99.7
Yorkshire Water River Dearne BIRDS EDGE CSO 8 25 99.9
Yorkshire Water Smithy Brook EAST COWICK SEWAGE PUMPING STATION 7 17 77
Yorkshire Water Pits Beck Culverted NETHERTON CSO 25 12 98.9
Yorkshire Water River Dearne WAKEFIELD ROAD SCISSET CSO 2 10 76.6
Yorkshire Water Bretton Brook TOWN FARM 4 SSO 5 10 99.9
Yorkshire Water Spring Mill Beck OSSETT TOWNGATE NO 2 CSO 13 9 99.9
Yorkshire Water Owler Beck Via Surface Wtr Sw PLEDWICK CSO 17 7 99.9
Yorkshire Water Bretton Brook INNFOLD FARM 3 NO 2 CSO 4 7 99.9
Yorkshire Water Chapelthorpe Bank Owler B CHAPELTHORPE CSO 1 4 99.8
Yorkshire Water River Dearne TOWN FARM 4 CSO 1 3 99.9
Yorkshire Water Thorpe Dike LANE HACKINGS GREEN CSO 8 2 93.9
Yorkshire Water Clvrt Springfield Beck OSSETT WAKEFIELD ROAD 2 CSO 5 2 100
Yorkshire Water River Calder DENBY DALE ROAD CSO 2 1 100
Yorkshire Water Owler Beck/Newmillerdam NEWMILLERDAM CSO 3 1 99.1
Yorkshire Water Bushy Beck GAWTHORPE MAIN STREET CSO 1 0 60.7
Yorkshire Water River Dearne SPRING GROVE CSO 1 0 95.5
Yorkshire Water Clvrt Toad Hole Dike BACK LANE CSO 0 0 99
Yorkshire Water Bretton Brook TOWN FARM 2 CSO 0 0 99.9
Yorkshire Water Woodsome Beck DOGLEY CSO 0 0 99
Yorkshire Water River Calder SWALLOWS NEST CSO 0 0 0
Yorkshire Water Oakenshaw Beck AGBRIGG GARAGE SPS 0 0 99.8
Yorkshire Water River Dearne CATCH BAR CSO 0 0 58.9

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. This 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.