United Utilities

was responsible for at least 77,817 sewage overflows in 2024
On average 213.2 times a day

These lasted for 450,778 hours (That's 52.17 years!) - in 1,977 different locations across their service area

United Utilities has 11 CSOs dumping sewage right now

Here are the ones that have been overflowing for the longest, without interruption

We are getting more data collated for each of the CSOs... right now we just have the Constituency. Unfortunately, the water companies use different names for the CSOs in their live data than in the annual returns, so it will take a bit of time to link all the data up....

1. UUG0436

Salford

Started 2 weeks ago

2. UUG0777

Stalybridge and Hyde

Started 2 weeks ago

3. UUG0841

Mid Cheshire

Started 3 months ago

4. UUG1130

Congleton

Started 1 week ago

5. UUG1298

Ribble Valley

Started 4 weeks ago

6. UUG1701

Warrington South

Started 1 month ago

7. UUG1754

Bury South

Started 1 month ago

8. UUG1809

Chester South and Eddisbury

Started 5 days ago

9. UUG1877

Bolton West

Started 2 months ago

How many Sewage Overflows are dumping sewage?

We have live data for United Utilities so we can track what happens every day - given that overflows are supposed to happen on an 'exceptional' basis only - does the chart indicate that?

The red line indicates the number of CSOs that overflowed for at least 30mins, the grey, the number of CSOs that were offline for at least 30mins, and the blue line is the total number of CSOs that we can get information for.

There is daily updated information on all constituencies covered by United Utilities

2024 - By Water Company

How does each water company compare? These are the totals by company for each. The totals are really high, counting things in hours doesn't make it very easy to think about. Here we show how many years of continuous sewage dumps happened in a single year, by water company.

2024 - Asset Spill Duration Comparison

It isn't like there are just a few outliers... the problem exists across the entire estate of water assets. Here we show a 'cumulative frequency diagram' - where the number of CSOs that dumped sewage for a time, or longer, is shown. You can see that many CSOs dumped sewage into a river for months and months.

United Utilities is highlighted in the plot below

2024 - Worst Locations United Utilities

1. CARTMEL IN CARK PUMPING STATION

Westmorland and Lonsdale polluted for 4,775 hours, into River Eea

236 incidents

That's 6.63 months.

4.5 times a week, on average

2. GLEASTON CASTLE CSO

Barrow and Furness polluted for 4,517 hours, into Gleaston Beck

191 incidents

That's 6.27 months.

3.7 times a week, on average

3. KIRK BAMPTON WWTW (KIRKB)

Penrith and Solway polluted for 4,280 hours, into Burghmoor Beck

310 incidents

That's 5.94 months.

6 times a week, on average

4. NEWBIGGIN (LEVEN) WWTW NEWBG

Barrow and Furness polluted for 3,863 hours, into Deep Meadows Beck

216 incidents

That's 5.37 months.

4.2 times a week, on average

5. BROMBOROUGH WWTW

Ellesmere Port and Bromborough polluted for 3,635 hours, into River Mersey Estuary

325 incidents

That's 5.05 months.

6.2 times a week, on average

6. ORTON STW

Westmorland and Lonsdale polluted for 3,579 hours, into Chapel Beck

219 incidents

That's 4.97 months.

4.2 times a week, on average

Water Companies

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. This 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.