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Altrincham and Sale West - 2025 Sewage

Polluted by sewage 2,376 hours in 2025 , monitoring offline 3,732 hours , potential overflows 956 hours

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

Which Year?

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Altrincham and Sale West 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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Daily Data

Jan - 1,017 hours , 14 potential
Feb - 55 hours , 0 offline
Mar - 22 hours , 0 offline
Apr - 4 hours , 36 offline
May - 69 hours , 2 offline
Jun - 51 hours , 914 offline
Jul - 24 hours , 650 offline
Aug - 10 hours , 0 potential
Sept - 224 hours , 6 potential
Oct - 165 hours , 927 potential
Nov - 405 hours , 6 potential
Dec - 323 hours , 0 potential
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
United Utilities BOWDON WwTW River Bollin 71 771 h 35m 676 h
United Utilities ALTRINCHAM WwTW Sinderland Brook 38 224 h 38m 545 h
United Utilities Pool Bank Farm, Bowdon CSO River Bollin 51 196 h 38m 1,175 h
United Utilities Park Road/Arthog Road CSO River Bollin 50 165 h 40m 0 h
United Utilities DUNHAM MASSEY WwTW River Bollin 34 157 h 4m 387 h
United Utilities Dunham Massey Outfall SSO River Bollin Via Sws 31 128 h 12m 388 h
United Utilities ALTRINCHAM WwTW Sinderland Brook 16 122 h 24m 1 h
United Utilities Pool Bank Farm, Bowdon CSO River Bollin 20 95 h 46m -
United Utilities Golf Road PS Timperley Brook 30 87 h 7m -
United Utilities DUNHAM MASSEY WwTW River Bollin 13 82 h 42m -
United Utilities Wellington Road CSO River Darwen 12 56 h 32m -
United Utilities Barrow Lane CSO River Bollin 29 43 h 20m 30 h
United Utilities Park Road/Arthog Road CSO River Bollin 13 39 h 26m -
United Utilities Oakfield Street CSO Timperley Brook 21 37 h 18m 0 h
United Utilities Dunham Massey Outfall SSO River Bollin Via Sws 10 37 h 6m -
United Utilities Parkgate Farm Warburton CSO Manchester Ship Canal 10 29 h 46m 22 h
United Utilities Stamford New Road CSO Timperley Brook 26 22 h 58m 0 h
United Utilities Golf Road PS Timperley Brook 8 21 h 59m -
United Utilities Barrow Lane CSO River Bollin 7 19 h 52m 12 h
United Utilities Wellington Road CSO River Darwen 4 18 h 19m -
United Utilities Oakfield Street CSO Timperley Brook 5 6 h 36m 0 h
United Utilities Altrincham WwTW High Level Overflow (Formerly Woodcote Road CSO) Sinderland Brook 4 5 h 34m 3 h
United Utilities Stamford New Road CSO Timperley Brook 4 3 h 42m -
United Utilities Balfour Road CSO Timperley Brook 3 1 h 46m 34 h
United Utilities Hawthorn Road CSO Timperley Brook 1 0 h 4m 0 h
United Utilities BOWDON WwTW River Bollin 0 0 h 1,406 h
United Utilities Parkgate Farm Warburton CSO Manchester Ship Canal 0 0 h -
United Utilities Hawthorn Road CSO Timperley Brook 0 0 h -
United Utilities Chapel Lane CSO River Bollin 0 0 h -
United Utilities Altrincham WwTW High Level Overflow (Formerly Woodcote Road CSO) Sinderland Brook 0 0 h -
United Utilities Cecil Road/Ashley Road CSO River Bollin Via Sws 0 0 h -
United Utilities Cecil Road/Ashley Road CSO River Bollin Via Sws 0 0 h -
United Utilities Balfour Road CSO Timperley Brook 0 0 h -
United Utilities Chapel Lane CSO River Bollin 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.