Sewage Map

Mersey (upstream of Manchester Ship Canal) sewage map and spill data

51 storm overflows listed in the 2025 annual return name this water. All are operated by United Utilities. Check the latest company report for each outlet below.

51
Outlet records
1,711
Spills in 2025
7,676
Recorded hours
50
Linked to a live feed

7 records show monitor operation below 90%. Annual figures describe the whole of 2025, not today.

Official waterbody record ↗How spills are countedSearch the national map

Outlets on Mersey (upstream of Manchester Ship Canal)

Filter by the latest company report. The map follows the filters.

Filters apply to the map and list. Recent stops need a current report and a recorded stop time. They do not show whether water is safe.

Showing 10 of 51 outlets

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Most recorded spills in 2025

The highest 2025 counts among these outlets. A count is events, not volume or harm. Equal counts share a rank.

  1. 1
    SALE WwTW

    United Utilities

    89spills
  2. 2
    Hope Street CSO

    United Utilities

    84spills
  3. 3
    STOCKPORT WwTW

    United Utilities

    82spills
  4. 4
    Barlow Moor Road / Rowsley Avenue CSO

    United Utilities

    79spills
  5. 4
    Dane Bank Road CSO

    United Utilities

    79spills

Spills over time

The median outlet on Mersey (upstream of Manchester Ship Canal) recorded 28 spills in 2025, against 11 across England.

38 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 18 recorded more spills, 17 fewer and 3 the same. Together they went from 1,286 to 1,294 spills, a rise of 1%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
2025511,7112811
2024501,6732419

Earlier returns list fewer of these outlets, so totals are not comparable between years. The median per outlet and the like-for-like change are fairer comparisons. Counts are events, not volume.

All outlet records on Mersey (upstream of Manchester Ship Canal)

51 outlet records in alphabetical order. Each link opens the outlet page with its latest report and annual history.

A1 outlet
B7 outlets
C5 outlets
D1 outlet
E1 outlet
F2 outlets
G1 outlet
H2 outlets
K1 outlet
L1 outlet
M4 outlets
O1 outlet
P2 outlets
R1 outlet
S11 outlets
T4 outlets
U1 outlet
W4 outlets
Y1 outlet

Sources and dates

Outlet locations, waterbody links and spill figures come from the Environment Agency 2025 event duration monitoring annual return. The latest company reports come from each operator’s live feed and carry their own dates. Waterbody ID: GB112069061030. The official waterbody record is a source lookup; its classification is not imported here.

All sourcesHow the data worksReport pollution

Questions about Mersey (upstream of Manchester Ship Canal)

Which outlets are linked to Mersey (upstream of Manchester Ship Canal)?
The source links 51 outlet records to waterbody GB112069061030. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Mersey (upstream of Manchester Ship Canal)?
51 records report 1,711 spills in 2025 and 7,676 recorded hours. All listed records have a usable count. Outlets can discharge at the same time, so the hours are not the time the whole water was affected.
Who is responsible for the outlets on Mersey (upstream of Manchester Ship Canal)?
United Utilities operates every listed outlet. Contact the operator or the official pollution service if you see a problem in the water.
Which outlets on Mersey (upstream of Manchester Ship Canal) are linked to a live feed?
50 of the 51 records are matched to a monitor in a company live feed. A link does not mean the monitor is working now. Use the status filters above to see the latest report for each outlet, with its date. The rest show annual figures only.
How complete is the monitoring for Mersey (upstream of Manchester Ship Canal)?
7 of the listed records have monitor operation below 90% for 2025. Events can be missed when a monitor is not working, so low counts from those outlets may understate activity.
Does this show if Mersey (upstream of Manchester Ship Canal) is safe?
No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.