Sewage Map

Simister sewage map and spill data

291 storm overflows listed in the 2025 annual return sit within 10 km of the official Simister reference point. All are operated by United Utilities. Check the latest company report for each outlet below.

291
Outlets within 10 km
5,405
Spills in 2025
16,657
Recorded hours
281
Linked to a live feed

25 records show monitor operation below 90%. This is a straight-line distance search, not a drainage or boundary join. Annual figures describe the whole of 2025, not today.

Rivers and waters these outlets name

Receiving waters named in the annual return for outlets on this page, with the number of outlets for each.

Official place reference ↗How spills are countedSearch by postcode

Outlets near Simister

Filter by the latest company report or search within this area. 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 291 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
    Rochdale WwTW

    United Utilities · River Roch

    104spills
  2. 2
    Clammerclough CSO

    United Utilities · River Croal

    93spills
  3. 3
    Rochdale Road/Collyhurst CSO

    United Utilities · The River Irk

    92spills
  4. 4
    Boothroyden Road CSO

    United Utilities · The River Irk

    90spills
  5. 4
    Lomax Street combined sewer overflow (099AA) (BRY0033)

    United Utilities · The River Irwell

    90spills

Spills over time

The median outlet near Simister recorded 8 spills in 2025, against 11 across England.

243 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 48 recorded more spills, 153 fewer and 42 the same. Together they went from 6,107 to 4,783 spills, a fall of 22%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
20252915,405811
20242897,0441219

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 near Simister

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

A10 outlets
B33 outlets
C26 outlets
D7 outlets
E3 outlets
F12 outlets
G8 outlets
H14 outlets
I1 outlet
J6 outlets
K6 outlets
L17 outlets
M34 outlets
N4 outlets
O13 outlets
P19 outlets
Q3 outlets
R21 outlets
S23 outlets
T8 outlets
V6 outlets
W16 outlets
Y1 outlet

Sources and dates

Outlet locations and spill figures come from the Environment Agency 2025 event duration monitoring annual return. The place reference point is the ONS built-up area point (ID E63001175). The latest company reports come from each operator’s live feed and carry their own dates.

All sourcesHow the data worksReport pollution

Questions about Simister

What area does this Simister page cover?
It shows outlets within 10 km of the official place reference point. It does not follow council, town or postcode boundaries. Use the postcode search on the map for a search around your own location.
How many spills were recorded near Simister?
291 outlet records report 5,405 spills in 2025. Every record on this page has a usable count.
Which water companies operate outlets near Simister?
United Utilities operates every outlet listed on this page. Open a company page to see its full outlet list and annual totals.
Which outlets near Simister are linked to a live feed?
281 of the 291 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 check the latest report and its date. The other 10 show annual figures only.
Did any outlet near Simister record zero spills in 2025?
54 records report zero counted spills in 2025. 25 records on this page have monitor operation below 90%, so check coverage before treating a low count as reliable.
Does nearby mean an outlet affected Simister?
No. This is a straight-line location search. The map does not model drainage, river flow or pollution travel, and a nearby outlet can discharge into a different watercourse.