Altrincham and Sale West - 2025 Sewage

Polluted by sewage 3,322 hours in 2025

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

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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.

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Constituencies near Altrincham and Sale West

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Altrincham and Sale West, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.

Each CSO has a row, the most recent data is on the right hand side.

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Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Total Duration (days)
United Utilities BOWDON WwTW River Bollin 71 769 h 43m 32.04
United Utilities ALTRINCHAM WwTW Sinderland Brook 60 763 h 57m 31.79
United Utilities DUNHAM MASSEY WwTW River Bollin 49 544 h 23m 22.67
United Utilities Pool Bank Farm, Bowdon CSO River Bollin 51 196 h 38m 8.17
United Utilities Park Road/Arthog Road CSO River Bollin 50 166 h 7m 6.92
United Utilities Dunham Massey Outfall SSO River Bollin Via Sws 31 128 h 12m 5.33
United Utilities ALTRINCHAM WwTW Sinderland Brook 16 121 h 32m 5.04
United Utilities Pool Bank Farm, Bowdon CSO River Bollin 19 95 h 18m 3.96
United Utilities Golf Road PS Timperley Brook 30 87 h 2m 3.62
United Utilities DUNHAM MASSEY WwTW River Bollin 13 82 h 42m 3.42
United Utilities Barrow Lane CSO River Bollin 29 60 h 38m 2.5
United Utilities Wellington Road CSO River Darwen 12 56 h 32m 2.33
United Utilities Park Road/Arthog Road CSO River Bollin 13 38 h 34m 1.58
United Utilities Oakfield Street CSO Timperley Brook 21 37 h 18m 1.54
United Utilities Dunham Massey Outfall SSO River Bollin Via Sws 10 37 h 6m 1.54
United Utilities Parkgate Farm Warburton CSO Manchester Ship Canal 10 35 h 32m 1.46
United Utilities Stamford New Road CSO Timperley Brook 26 23 h 28m 0.96
United Utilities Golf Road PS Timperley Brook 8 21 h 59m 0.88
United Utilities Barrow Lane CSO River Bollin 7 19 h 52m 0.79
United Utilities Wellington Road CSO River Darwen 4 18 h 19m 0.75
United Utilities Oakfield Street CSO Timperley Brook 5 6 h 36m 0.25
United Utilities Altrincham WwTW High Level Overflow (Formerly Woodcote Road CSO) Sinderland Brook 4 5 h 34m 0.21
United Utilities Stamford New Road CSO Timperley Brook 4 3 h 42m 0.12
United Utilities Balfour Road CSO Timperley Brook 3 2 h 4m 0.08
United Utilities Hawthorn Road CSO Timperley Brook 1 0 h 4m 0
United Utilities Balfour Road CSO Timperley Brook 0 0 h 0
United Utilities Chapel Lane CSO River Bollin 0 0 h 0
United Utilities Cecil Road/Ashley Road CSO River Bollin Via Sws 0 0 h 0
United Utilities Chapel Lane CSO River Bollin 0 0 h 0
United Utilities BOWDON WwTW River Bollin 0 0 h 0
United Utilities Parkgate Farm Warburton CSO Manchester Ship Canal 0 0 h 0
United Utilities Hawthorn Road CSO Timperley Brook 0 0 h 0
United Utilities Cecil Road/Ashley Road CSO River Bollin Via Sws 0 0 h 0
United Utilities Altrincham WwTW High Level Overflow (Formerly Woodcote Road CSO) Sinderland Brook 0 0 h 0

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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ยฉ 2020-2025 Top-Of-The-Poops CC-BY-SA 4.0,
ยฉ Openstreetmap contributors, Contains OS data ยฉ Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis ยฉ 2025 Top-Of-The-Poops

Some data reproduced under Open Government Licence

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