It's a Dirty Business

Watch Channel 4's documentary about the state of the water industry, then sign the petition to bring water back to public ownership.

Calder Valley - 2025 Sewage

Polluted by sewage 12,585 hours in 2025 - That's 1.46 years , monitoring offline 40,718 hours , potential overflows 3,633 hours

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

Which Year?

Select Another Constituency

Select the constituency from the drop-down
✔ 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 Calder Valley 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.

Take Action

Your local MP is Josh Fenton-Glynn (Labour) - Find out more about their interests, donors, and voting at They Work For You

Share this page, post a message, and tell others about the huge problem of sewage pollution across the UK

Daily Data

Jan - 2,397 hours , 107 potential
Feb - 172 hours , 2,831 offline
Mar - 4 hours , 3,720 offline
Apr - 1 hours , 4,187 offline
May - 97 hours , 78 potential
Jun - 131 hours , 4,511 offline
Jul - 134 hours , 22 potential
Aug - 57 hours , 181 potential
Sept - 1,083 hours , 86 potential
Oct - 1,648 hours , 187 potential
Nov - 3,168 hours , 1,373 potential
Dec - 3,683 hours , 1,548 potential
We need your support!

Please consider a one-off or small recurring donation. We need your help to keep this site going.

Donate Now

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 113 1,427h 53m -
Yorkshire Water CROW NEST BRIDGE/CSO River Calder 85 1,408h 13m 60 h
Yorkshire Water EASTWOOD/STW River Calder 75 1,010h -
Yorkshire Water DELIGHT/CSO Colden Water 53 826h 37m 39 h
Yorkshire Water EASTWOOD/NO 2 CSO River Calder 89 739h 52m -
Yorkshire Water THORNHILLS BECK LANE/CSO River Calder 98 574h 2m -
Yorkshire Water WISTONS LANE/CSO Canker Dyke 44 510h 21m 86 h
Yorkshire Water BRIGHOUSE/UPPER STW/3XDWF OVERFLOW River Calder 52 489h 20m -
Yorkshire Water BARSEY GREEN/STW Barsey Clough 46 472h 29m 198 h
Yorkshire Water HIGH ROYD/NO 2 STW/3XDWF OVERFLOW River Calder 43 418h 10m -
Yorkshire Water BREARLEY MAIN SEWER/CSO River Calder 73 417h 3m -
Yorkshire Water WEST VALE/CSO Black Brook 55 362h 15m 2,773 h
Yorkshire Water BONEGATE LANE/CSO River Calder 95 331h 8m -
Yorkshire Water WYKE BECK/CSO Bottom Hall Beck 63 313h 56m -
Yorkshire Water FIELDEN TERRACE/CSO Oak Hill Clough 80 309h 30m -
Yorkshire Water FIELDING STREET/CSO River Calder 44 297h 35m -
Yorkshire Water HALIFAX OLD ROAD/CSO Wyke Beck 47 266h 45m -
Yorkshire Water ROSE GROVE LANE/CSO River Calder 58 228h 30m -
Yorkshire Water RIPPONDEN/STW/3XDWF OVERFLOW River Ryburn 42 192h 57m 1,159 h
Yorkshire Water NEW ROAD/CSO Luddenden Brook 17 159h 13m -
Yorkshire Water BROOKFOOT MILLS/CSO Wyke Beck 35 154h 12m -
Yorkshire Water COLEY BECK/CSO Wyke Beck 46 141h 36m -
Yorkshire Water BRIGHOUSE/UPPER STW/6XDWF OVERFLOW River Calder 32 141h 20m -
Yorkshire Water WOODHOUSE LANE/CSO River Calder 49 120h 14m -
Yorkshire Water CRAGG ROAD/NO 2 CSO Cragg Brook 37 112h 56m -
Yorkshire Water HAZELWOOD STREET/CSO River Calder 34 106h 40m 1,675 h
Yorkshire Water SKEW BRIDGE/CSO Walsden Water 16 78h 37m -
Yorkshire Water FERN HILL/CSO River Calder 6 71h 32m 6,825 h
Yorkshire Water HUDDERSFIELD RD 106/CSO Canker Dyke 35 69h 49m -
Yorkshire Water SOUTH LANE/CSO Canker Dyke 33 66h 10m -
Yorkshire Water ASHENHURST ROAD/CSO River Calder 31 64h 24m -
Yorkshire Water POLLARD STREET/NO 2 CSO River Calder 21 63h 2m -
Yorkshire Water HEPTONSTALL ROAD/CSO Hebden Water 22 57h 13m -
Yorkshire Water BRAMSTON STREET/CSO River Calder 27 50h 15m 1,290 h
Yorkshire Water BURNLEY RD CORNHOLME/CSO River Calder 12 50h 5m -
Yorkshire Water MARKET STREET/CSO River Calder 10 43h 19m -
Yorkshire Water ELLEN HOLME ROAD/CSO River Calder 8 42h 10m -
Yorkshire Water ALEGER STREET/CSO River Calder 21 41h 39m -
Yorkshire Water ELLAND WEST VALE/SPS River Calder 18 39h 25m -
Yorkshire Water SYKE LANE/CSO Wyke Beck 22 37h 55m -
Yorkshire Water HANGINGROYD ROAD/CSO River Calder 8 36h 31m 347 h
Yorkshire Water HOYLE HOUSE BRIDGE/CSO Clifton Beck 20 34h 45m -
Yorkshire Water HOYLES MEMORIAL GDNS/CSO Black Brook 20 29h 57m -
Yorkshire Water FOREST HILL ROAD/CSO Holywell Brook 22 29h 31m -
Yorkshire Water RIVER STREET/CSO River Calder 15 27h 34m 2,543 h
Yorkshire Water ELLAND LOWFIELDS/SPS River Calder 13 20h 52m -
Yorkshire Water HOLLINS MILL LANE/CSO Rochdale Canal 3 14h 40m 11 h
Yorkshire Water OLD GATE/CSO Hebden Water 9 14h 19m -
Yorkshire Water LOWER EDGE ROAD/CSO River Calder 3 14h 10m -
Yorkshire Water EASTGATE ELLAND/CSO Canker Dyke 15 10h 40m -
Yorkshire Water BIRDS ROYD LANE/NO 2 CSO River Calder 10 10h 8m 14 h
Yorkshire Water LONGFIELD ROAD/CSO Walsden Water 10 8h 36m -
Yorkshire Water MITCHELL STREET/CSO River Calder 3 7h 13m -
Yorkshire Water SUNNYBANK/CSO Black Brook 3 3h 45m -
Yorkshire Water CARVER CLOUGH/NO 2 CSO Carver Clough 4 3h 36m -
Yorkshire Water BOROUGH BOUNDARY/CSO Wyke Beck 2 3h 26m -
Yorkshire Water BROW BRIDGE/CSO Black Brook 4 1h 55m -
Yorkshire Water DYHOUSE LANE/CSO River Calder 4 1h 34m -
Yorkshire Water IBBOTROYD/CSO Ibbot Royd Clough 2 1h 14m -
Yorkshire Water GAS WORKS LANE/CSO River Calder 2 0h 42m -
Yorkshire Water STAINLAND ROAD/CSO Holywell Brook 3 0h 36m -
Yorkshire Water HOULTS LANE/CSO Black Brook 2 0h 28m -
Yorkshire Water HOLYWELL GREEN/CSO Holywell Brook 1 0h 14m -
Yorkshire Water LOWER MILL/CSO Hebden Water 2 0h 14m -
Yorkshire Water MIDGELEY ROAD/CSO Culverted White Lee Clough 1 0h 14m -
Yorkshire Water ELLAND WEST VALE/SPS River Calder 1 0h -
Yorkshire Water ELLAND MILLGATE/CSO River Calder 0 0h -
Yorkshire Water HELLIWELL SYKE/NO 3 CSO Helliwell Syke 0 0h -
Yorkshire Water ROCHDALE ROAD/CSO Black Brook 0 0h 32 h
Yorkshire Water SCOUT ROAD/CSO River Calder 0 0h -
Yorkshire Water THE DRIVE/CSO River Calder 0 0h -
Yorkshire Water CARR HALL LANE/CSO Calder And S 0 0h 2,145 h
Yorkshire Water LILLANDS LANE/CSO River Calder 0 0h -
Yorkshire Water PARK ROAD/CSO River Calder 0 0h -
Yorkshire Water ELLAND LOWFIELDS/SPS River Calder 0 0h -
Yorkshire Water HALL STREET/CSO Walsden Water 0 0h 8,512 h
Yorkshire Water LORDS LANE BRIGHOUSE/CSO River Calder 0 0h -
Yorkshire Water OLD BRIDGE INN/CSO River Ryburn 0 0h -
Yorkshire Water REDACRE/NO 2 STW/3XDWF OVERFLOW River Calder 0 0h -
Yorkshire Water WYKE OLD LANE/CSO Clifton Beck 0 0h -
Yorkshire Water HOLYWELL BROOK/CSO Culverted Holywell Brook 0 0h 8,416 h
Yorkshire Water SALEM CRICKET GROUND/CSO Hebden Water 0 0h 8,176 h
Yorkshire Water BIRCHCLIFFE ROAD/NO 2 CSO Hebden Water 0 0h -
Yorkshire Water PARK ROAD ELLAND/CSO River Calder 0 0h -
Yorkshire Water SADDLEWORTH ROAD/CSO Black Brook 0 0h 40 h
Yorkshire Water ELLAND LANE/CSO River Calder 0 0h -

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.