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Thirsk and Malton - 2025 Sewage

Polluted by sewage 18,257 hours in 2025 - That's 2.11 years , monitoring offline 35,875 hours , potential overflows 1,257 hours

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

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Thirsk and Malton for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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.

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Constituencies near Thirsk and Malton

Daily Data

Jan - 3,685 hours , 39 potential
Feb - 788 hours , 3,628 offline
Mar - 594 hours , 2,324 offline
Apr - 25 hours , 1,633 offline
May - 113 hours , 2,546 offline
Jun - 162 hours , 2,938 offline
Jul - 369 hours , 181 potential
Aug - 35 hours , 3,209 offline
Sept - 685 hours , 26 potential
Oct - 422 hours , 176 potential
Nov - 4,079 hours , 170 potential
Dec - 7,286 hours , 640 potential
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Yorkshire Water HAROME/STW Harome Moor Drain 98 1,388 h 59m -
Yorkshire Water FELIXKIRK PIPER HILL/STW Whitelass Beck 94 1,233 h 14m -
Yorkshire Water WELHAM ROAD NORTH/HLR Culverted Mill Beck 75 1,022 h 13m -
Yorkshire Water YORKERSGATE/CSO River Derwent 80 885 h 9m 3,485 h
Yorkshire Water KIRBY MISPERTON/STW Costa Beck 52 829 h 58m -
Yorkshire Water OSWALDKIRK/STW Holbeck 78 747 h 7m -
Yorkshire Water WEST LILLING/CSO Black Dike 57 745 h 31m -
Yorkshire Water KIRKBYMOORSIDE/STW River Dove 41 704 h 27m 208 h
Yorkshire Water WESTOW/STW Howl Beck 69 693 h 21m -
Yorkshire Water AMPLEFORTH VILLAGE/STW Holbeck 41 635 h 52m 20 h
Yorkshire Water LANGTHORNE/NO 2 STW Cobshaw Dyke 58 634 h 35m 1,112 h
Yorkshire Water COWESBY/STW/6XDWF OVERFLOW Little Beck 40 439 h 59m -
Yorkshire Water GREAT BARUGH/STW Seven 46 436 h 11m -
Yorkshire Water BRAWBY/STW River Seven 44 412 h 45m -
Yorkshire Water CASTLEGATE/CSO River Derwent 20 402 h 18m -
Yorkshire Water ACKLAM/STW Acklam Beck 36 396 h 7m -
Yorkshire Water SCRAYINGHAM SOUTH FM/CSO Goit Via A Culvertedsystem 47 332 h 49m 108 h
Yorkshire Water HOWSHAM/STW River Derwent 27 299 h 39m -
Yorkshire Water MUSTON/CSO Hertford 32 292 h 17m 757 h
Yorkshire Water MALTON/STW/3XDWF OVERFLOW River Derwent 30 276 h 27m -
Yorkshire Water FOSTON/STW Spital Beck 30 262 h 31m -
Yorkshire Water NORTHALLERTON ROAD/CSO Terry Gutter 35 253 h 8m 76 h
Yorkshire Water BEDALE/STW Bedale Beck 31 238 h 11m -
Yorkshire Water CONEYSTHORPE/STW Mill Hills Beck 14 236 h 30m -
Yorkshire Water HELMSLEY/STW River Rye 43 221 h 1m -
Yorkshire Water CHANDLERS WHARF/CSO River Derwent 20 216 h 30m -
Yorkshire Water KIRKBY MOORSIDE/NO 2 CSO River Dove 72 214 h 59m -
Yorkshire Water FLAXTON/STW Sike 41 211 h 19m -
Yorkshire Water COLD KIRBY/NO 2 STW Unnamed Grass Keld 43 183 h 45m 999 h
Yorkshire Water OLDSTEAD/STW Wakendale Beck 26 157 h 30m -
Yorkshire Water LOCKTON/STW Levisham Beck 60 148 h 17m -
Yorkshire Water ST JAMES GREEN/CSO Cod Beck 40 144 h 36m -
Yorkshire Water SNAPE/STW/3XDWF OVERFLOW Main Cut 28 140 h 52m -
Yorkshire Water HUNMANBY STONEGATE/CSO Main Drain River Hertford 45 138 h 36m -
Yorkshire Water THIRSK/STW Cod Beck 37 126 h 33m -
Yorkshire Water THORNTON LE MOOR/CSO River Wiske 9 118 h 45m 3,157 h
Yorkshire Water HUNMANBY/STW River Hertford 24 115 h 48m -
Yorkshire Water LOW LN HUTTON SESSAY/CSO Culverted Birdforth Beck 24 109 h 7m -
Yorkshire Water PICKERING/STW/6XDWF OVERFLOW Costa Beck 49 107 h 28m -
Yorkshire Water SINNINGTON MAIN ST/CSO River Severn 20 104 h 45m -
Yorkshire Water NORTON CHURCH ST/2 CSO River Derwent 50 104 h 18m -
Yorkshire Water GILLING EAST/STW Holbeck 12 104 h 14m -
Yorkshire Water HACKFORTH/NO 2 STW Bowbridge Beck 27 94 h 13m -
Yorkshire Water SINDERBY/STW/3XDWF OVERFLOW Holme And Ainderby Beck 14 91 h 10m -
Yorkshire Water SHEEPFOOT HILL/CSO River Derwent 5 90 h 44m -
Yorkshire Water WASS/NO 2 STW Holbeck 18 85 h -
Yorkshire Water LITTLE BARUGH/STW Costa Beck 17 74 h 9m -
Yorkshire Water FILEY TRANSFER/CSO North Sea 30 73 h 20m -
Yorkshire Water ALLERSTON/CSO Allerston Beck 4 72 h 5m -
Yorkshire Water SHERIFF HUTTON/STW Howl Beck 17 66 h 8m -
Yorkshire Water BURRILL/NO 2 STW Burrill Beck 36 62 h 46m -
Yorkshire Water HUNMANBY GAP/CSO North Sea Via Reighton Gill 21 61 h 21m -
Yorkshire Water GREAT CRAKEHALL/CSO Bedale Beck 12 59 h 5m -
Yorkshire Water CRAMBE/STW River Derwent 12 58 h 47m -
Yorkshire Water FLATCLIFFS/CSO North Sea 13 58 h 18m -
Yorkshire Water BLAKEY LANE/NO 2 CSO Cod Beck 32 56 h 38m 2,700 h
Yorkshire Water LINKFIELD/NO 2 SPS Tbc When Permit Issued 11 56 h 23m -
Yorkshire Water BEDALE/STW Bedale Beck 21 50 h 1m -
Yorkshire Water WHEELGATE/CSO River Derwent 34 47 h 44m -
Yorkshire Water THORNTON LE DALE/STW Thornton Beck 12 42 h 38m -
Yorkshire Water LEEMING BAR/CSO Bedale Beck 9 40 h 47m -
Yorkshire Water SAWMILL LANE/CSO River Rye 23 37 h 44m -
Yorkshire Water GALE LANE/NO X CSO Syke Cut Via A Public Sewer 8 36 h 14m 125 h
Yorkshire Water LEEMING WATER LANE/CSO Tbc When Permit Issued 9 33 h 26m -
Yorkshire Water FOLKTON CARR LN/CSO Ditch 20 32 h 20m -
Yorkshire Water RILLINGTON/STW Rillington Beck 8 28 h 23m -
Yorkshire Water BROOKSIDE CLOSE/CSO Bedale Bk/Swale 3 27 h 14m 7,540 h
Yorkshire Water FILEY TRANSFER/CSO North Sea 9 27 h 5m -
Yorkshire Water MARTON/STW River Seven 2 27 h 1m -
Yorkshire Water FILEY TRANSFER/CSO North Sea 9 23 h 31m -
Yorkshire Water OUTGANG ROAD/CSO Outgang Drain 19 22 h 36m -
Yorkshire Water SHERBURN/STW Sherburn Beck 13 22 h 4m -
Yorkshire Water KIRKLINGTON/STW/PRELIMINARY TREATMENT-STW/3XDWF OVERFLOW Healam Beck 8 19 h 50m -
Yorkshire Water LASCELLES LANE/CSO River Derwent 24 18 h 53m -
Yorkshire Water THORNTON LE BEANS/CSO Thornton Le Beans Beck 7 18 h 5m -
Yorkshire Water RYEDALE AISLABY/SPS Costa Beck 9 17 h 58m 37 h
Yorkshire Water STAXTON VILLAGE/CSO Ditch 15 17 h 50m -
Yorkshire Water PICKERING/STW/3XDWF OVERFLOW Costa Beck 23 16 h 44m -
Yorkshire Water SOUTH END BEDALE/CSO Tbc When Permit Issued 15 15 h 34m 157 h
Yorkshire Water AMPLEFORTH/CSO Holbeck 9 11 h 34m -
Yorkshire Water SWINTON LOWFIELD/CSO River Rye 4 8 h 35m -
Yorkshire Water RILLINGTON/STW Rillington Beck 12 8 h 2m -
Yorkshire Water PICKHILL/CSO Pickhill Beck 3 6 h 36m 157 h
Yorkshire Water SCRUTON/STW Common Stell 6 6 h 25m -
Yorkshire Water HARBOUR VIEW BEDALE/CSO Not Matched In Ea Consents Database 7 6 h 19m -
Yorkshire Water SHERIFF HUTTON/CSO Bulmer Beck 4 6 h 16m -
Yorkshire Water MALTON HOLMESFLD/CSO River Derwent 18 6 h 11m -
Yorkshire Water GALE LANE/NO 2 CSO Syke Cut Via A Public Sewer 5 5 h 48m 2,807 h
Yorkshire Water SKIPTON ON SWALE/STW River Swale 8 5 h 6m -
Yorkshire Water RYEDALE NEW ROAD/CSO Wath Beck 10 4 h 35m -
Yorkshire Water THIRSK FINKLE ST/NO 2 CSO Cod Beck 5 4 h 5m 57 h
Yorkshire Water RAILWAY ST SLINGSBY/CSO Wath Beck 2 3 h 54m -
Yorkshire Water MARTON BRIDGE/CSO River Seven 1 3 h 19m 408 h
Yorkshire Water THIRSK CHAPEL STREET/CSO Cod Beck 4 3 h 4m -
Yorkshire Water ST PETERS STREET/CSO Mill Beck 6 2 h 48m -
Yorkshire Water FOSTON/CSO Spittal Beck 7 2 h 24m -
Yorkshire Water HOVINGHAM/STW Marrs Beck 1 1 h 58m -
Yorkshire Water ST HILDAS STREET/CSO East Beck 5 1 h 55m -
Yorkshire Water MALTON EBBERSTON/CSO Ebberston Beck 4 1 h 54m -
Yorkshire Water EASTGATE/CSO Outgang Drain 3 1 h 6m 631 h
Yorkshire Water HAWKSWELL LANE/CSO River Derwent 1 1 h 1m -
Yorkshire Water APPLETON LE MOOR/STW River Seven 1 0 h 42m -
Yorkshire Water WELHAM ROAD SOUTH/CSO Mill Beck 1 0 h 27m -
Yorkshire Water BALACLAVA/NO 2 CSO Priorpot Beck 1 0 h 25m -
Yorkshire Water STONE BRIDGE/NO 2 CSO Thornton Beck 1 0 h 19m -
Yorkshire Water REETON TERRACE/NO 1 CSO Priorpot Beck 0 0 h -
Yorkshire Water MISPERTON LANE/CSO Habton Ings Drain 0 0 h 3,185 h
Yorkshire Water PRIORPOT BRIDGE/CSO Priorpot Beck 0 0 h -
Yorkshire Water KIRKBY MILLS/CSO River Dove 0 0 h -
Yorkshire Water TOWN STREET MALTON/CSO River Derwent 0 0 h 8,464 h
Yorkshire Water SPORTSFIELD/NO 2 CSO River Dove 0 0 h -
Yorkshire Water OUTGAITS LANE/CSO River Hertford 0 0 h -
Yorkshire Water SHERIFF HUTTON/STW Howl Beck 0 0 h -
Yorkshire Water NORMANBY/CSO River Seven 0 0 h -
Yorkshire Water MALTON HAROME/CSO River Riccall 0 0 h -
Yorkshire Water FIRBY/STW Derwent 0 0 h -
Yorkshire Water ACKLAM/CSO Acklam Beck 0 0 h -
Yorkshire Water REETON TERRACE/NO 2 CSO Priorpot Beck 0 0 h -
Yorkshire Water OLD MALTONGATE/CSO River Derwent 0 0 h -
Yorkshire Water CUDDY BROWN CLOSE/CSO Thornton Beck 0 0 h -
Yorkshire Water SWINTON LOWFIELD/CSO River Rye 0 0 h -
Yorkshire Water NETHER SILTON/CSO Old Beck 0 0 h -
Yorkshire Water RYEDALE CARR LANE/CSO Holbeck 0 0 h -
Yorkshire Water SCRAYINGHAM RECTRY FM/CSO Derwent 0 0 h 930 h
Yorkshire Water THE BROWS/CSO River Derwent 0 0 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

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.

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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
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