Calder Valley - Live Sewage

Polluted by sewage 7,955 hours in 2026 , monitoring offline 88,883 hours , potential overflows 1,300 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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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Calder Valley 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 Calder Valley in 2026

Sewage7,955 hours
Monitoring offline88,883 hours
Potential pollution1,300 hours
Storm overflows86

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Daily Data

Jan - 2,102 hours , 917 potential
Feb - 3,645 hours , 179 potential
Mar - 914 hours , 142 potential
Apr - 334 hours , 9,447 offline
May - 90 hours , 9,869 offline
Jun - 0 hours , 9,360 offline
Jul - 0 hours , 9,713 offline
Aug - 203 hours , 9,762 offline
Sept - 172 hours , 61 potential
Oct - 491 hours , 7,716 offline
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Yorkshire Water PRINCESS BRIDGE/NO 2 CSO River Calder 111 1,558h 27m -
Yorkshire Water CROW NEST BRIDGE/CSO River Calder 85 1,235h 47m 467 h
Yorkshire Water THORNHILLS BECK LANE/CSO River Calder 94 552h 4m 0 h
Yorkshire Water BRIGHOUSE/UPPER STW/3XDWF OVERFLOW River Calder 58 490h 2m -
Yorkshire Water NEW ROAD/CSO Luddenden Brook 52 449h 16m -
Yorkshire Water BONEGATE LANE/CSO River Calder 91 366h 57m -
Yorkshire Water EASTWOOD/STW River Calder 26 318h 18m -
Yorkshire Water WYKE BECK/CSO Bottom Hall Beck 48 245h 5m 3 h
Yorkshire Water DELIGHT/CSO Colden Water 22 235h 54m -
Yorkshire Water EASTWOOD/NO 2 CSO River Calder 50 230h 2m -
Yorkshire Water WISTONS LANE/CSO Canker Dyke 27 213h 10m -
Yorkshire Water BREARLEY MAIN SEWER/CSO River Calder 55 206h 31m 10 h
Yorkshire Water BARSEY GREEN/STW Barsey Clough 26 186h -
Yorkshire Water BROOKFOOT MILLS/CSO Wyke Beck 35 185h 38m -
Yorkshire Water BRIGHOUSE/UPPER STW/6XDWF OVERFLOW River Calder 30 149h 47m 3 h
Yorkshire Water HIGH ROYD/NO 2 STW/3XDWF OVERFLOW River Calder 22 149h 36m -
Yorkshire Water COLEY BECK/CSO Wyke Beck 37 138h 22m 3 h
Yorkshire Water FIELDING STREET/CSO River Calder 26 124h 3m 8 h
Yorkshire Water RIPPONDEN/STW/3XDWF OVERFLOW River Ryburn 23 120h 33m -
Yorkshire Water FIELDEN TERRACE/CSO Oak Hill Clough 36 112h 9m 53 h
Yorkshire Water WEST VALE/CSO Black Brook 26 96h 4m 411 h
Yorkshire Water FERN HILL/CSO River Calder 19 69h 55m 551 h
Yorkshire Water WOODHOUSE LANE/CSO River Calder 43 59h 32m 10 h
Yorkshire Water HALIFAX OLD ROAD/CSO Wyke Beck 31 59h 8m 11 h
Yorkshire Water SYKE LANE/CSO Wyke Beck 16 49h 51m -
Yorkshire Water ROSE GROVE LANE/CSO River Calder 29 40h 23m -
Yorkshire Water CRAGG ROAD/NO 2 CSO Cragg Brook 15 30h 48m -
Yorkshire Water ELLAND WEST VALE/SPS River Calder 21 29h 30m -
Yorkshire Water GAS WORKS LANE/CSO River Calder 2 26h 54m 36 h
Yorkshire Water BRAMSTON STREET/CSO River Calder 27 26h 53m 285 h
Yorkshire Water HUDDERSFIELD RD 106/CSO Canker Dyke 32 26h 41m -
Yorkshire Water SOUTH LANE/CSO Canker Dyke 32 26h 39m -
Yorkshire Water MARKET STREET/CSO River Calder 14 16h 15m -
Yorkshire Water ALEGER STREET/CSO River Calder 16 15h 45m -
Yorkshire Water HEPTONSTALL ROAD/CSO Hebden Water 10 13h 18m -
Yorkshire Water LOWER EDGE ROAD/CSO River Calder 10 12h 32m -
Yorkshire Water ASHENHURST ROAD/CSO River Calder 9 9h 55m -
Yorkshire Water RIVER STREET/CSO River Calder 9 8h 48m -
Yorkshire Water HAZELWOOD STREET/CSO River Calder 7 8h 35m 389 h
Yorkshire Water POLLARD STREET/NO 2 CSO River Calder 10 8h 26m -
Yorkshire Water HOYLES MEMORIAL GDNS/CSO Black Brook 14 8h 26m -
Yorkshire Water BURNLEY RD CORNHOLME/CSO River Calder 6 7h 28m -
Yorkshire Water ELLAND LOWFIELDS/SPS River Calder 7 5h 16m 1 h
Yorkshire Water EASTGATE ELLAND/CSO Canker Dyke 11 4h 3m -
Yorkshire Water FOREST HILL ROAD/CSO Holywell Brook 5 4h 2m 19 h
Yorkshire Water ELLEN HOLME ROAD/CSO River Calder 3 3h 43m -
Yorkshire Water HOYLE HOUSE BRIDGE/CSO Clifton Beck 7 2h 50m -
Yorkshire Water OLD GATE/CSO Hebden Water 4 2h 24m 133 h
Yorkshire Water BIRDS ROYD LANE/NO 2 CSO River Calder 3 2h 22m 25 h
Yorkshire Water BROW BRIDGE/CSO Black Brook 4 1h 43m -
Yorkshire Water HOLYWELL GREEN/CSO Holywell Brook 4 1h 37m -
Yorkshire Water DYHOUSE LANE/CSO River Calder 6 1h 28m -
Yorkshire Water WYKE OLD LANE/CSO Clifton Beck 1 1h 25m 112 h
Yorkshire Water MIDGELEY ROAD/CSO Culverted White Lee Clough 4 1h 22m -
Yorkshire Water LONGFIELD ROAD/CSO Walsden Water 5 1h 10m -
Yorkshire Water HOULTS LANE/CSO Black Brook 2 0h 58m -
Yorkshire Water SUNNYBANK/CSO Black Brook 2 0h 30m -
Yorkshire Water BOROUGH BOUNDARY/CSO Wyke Beck 1 0h 21m -
Yorkshire Water STAINLAND ROAD/CSO Holywell Brook 1 0h 17m -
Yorkshire Water CARVER CLOUGH/NO 2 CSO Carver Clough 1 0h 14m -
Yorkshire Water CARR HALL LANE/CSO Calder And S 1 0h 12m -
Yorkshire Water ELLAND LANE/CSO River Calder 1 0h 10m -
Yorkshire Water ELLAND WEST VALE/SPS River Calder 3 0h 3m -
Yorkshire Water HANGINGROYD ROAD/CSO River Calder 0 0h 7 h
Yorkshire Water ELLAND MILLGATE/CSO River Calder 0 0h 6,623 h
Yorkshire Water HELLIWELL SYKE/NO 3 CSO Helliwell Syke 0 0h -
Yorkshire Water ROCHDALE ROAD/CSO Black Brook 0 0h -
Yorkshire Water SCOUT ROAD/CSO River Calder 0 0h -
Yorkshire Water HOLLINS MILL LANE/CSO Rochdale Canal 0 0h -
Yorkshire Water THE DRIVE/CSO River Calder 0 0h 6,633 h
Yorkshire Water LILLANDS LANE/CSO River Calder 0 0h 6,623 h
Yorkshire Water IBBOTROYD/CSO Ibbot Royd Clough 0 0h -
Yorkshire Water PARK ROAD/CSO River Calder 0 0h 6,633 h
Yorkshire Water ELLAND LOWFIELDS/SPS River Calder 0 0h 6,623 h
Yorkshire Water HALL STREET/CSO Walsden Water 0 0h 7,145 h
Yorkshire Water LORDS LANE BRIGHOUSE/CSO River Calder 0 0h 6,623 h
Yorkshire Water OLD BRIDGE INN/CSO River Ryburn 0 0h 6,633 h
Yorkshire Water REDACRE/NO 2 STW/3XDWF OVERFLOW River Calder 0 0h -
Yorkshire Water HOLYWELL BROOK/CSO Culverted Holywell Brook 0 0h 275 h
Yorkshire Water SALEM CRICKET GROUND/CSO Hebden Water 0 0h 7,145 h
Yorkshire Water BIRCHCLIFFE ROAD/NO 2 CSO Hebden Water 0 0h 6,633 h
Yorkshire Water MITCHELL STREET/CSO River Calder 0 0h -
Yorkshire Water PARK ROAD ELLAND/CSO River Calder 0 0h 6,623 h
Yorkshire Water SADDLEWORTH ROAD/CSO Black Brook 0 0h 7,145 h
Yorkshire Water LOWER MILL/CSO Hebden Water 0 0h -
Yorkshire Water SKEW BRIDGE/CSO Walsden Water 0 0h 6,273 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.