Sewage Map

Irwell (Croal to Irk) sewage map and spill data

56 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.

56
Outlet records
1,216
Spills in 2025
4,044
Recorded hours
52
Linked to a live feed

5 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 Irwell (Croal to Irk)

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 56 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
    Clammerclough CSO

    United Utilities

    93spills
  2. 2
    Agecroft Power Station

    United Utilities

    73spills
  3. 3
    Clifton PS

    United Utilities

    69spills
  4. 4
    Prestwich PS

    United Utilities

    66spills
  5. 5
    BOLTON WwTW

    United Utilities

    61spills

Spills over time

The median outlet on Irwell (Croal to Irk) recorded 16 spills in 2025, against 11 across England.

48 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 7 recorded more spills, 36 fewer and 5 the same. Together they went from 1,441 to 1,094 spills, a fall of 24%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
2025561,2161611
2024551,6162019

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 Irwell (Croal to Irk)

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

A3 outlets
B7 outlets
C8 outlets
F3 outlets
G1 outlet
H2 outlets
J1 outlet
K1 outlet
L5 outlets
M5 outlets
N1 outlet
P6 outlets
R5 outlets
S6 outlets
T2 outlets

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: GB112069061451. The official waterbody record is a source lookup; its classification is not imported here.

All sourcesHow the data worksReport pollution

Questions about Irwell (Croal to Irk)

Which outlets are linked to Irwell (Croal to Irk)?
The source links 56 outlet records to waterbody GB112069061451. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Irwell (Croal to Irk)?
56 records report 1,216 spills in 2025 and 4,044 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 Irwell (Croal to Irk)?
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 Irwell (Croal to Irk) are linked to a live feed?
52 of the 56 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 Irwell (Croal to Irk)?
5 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 Irwell (Croal to Irk) is safe?
No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.