Sewage Map

Bolton (Bolton) sewage map and spill data

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

172
Outlets within 10 km
4,173
Spills in 2025
14,946
Recorded hours
165
Linked to a live feed

22 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 Bolton (Bolton)

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 172 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
    91 Manchester Road CSO

    United Utilities · Croal Minor

    114spills
  2. 2
    West of Hacken Works (Syphon) CSO

    United Utilities · River Croal

    100spills
  3. 3
    Birtenshaw Farm CSO (BOL0151)

    United Utilities · Eagley Brook

    98spills
  4. 4
    No 76 Middle Brook CSO

    United Utilities · Middle Brook

    94spills
  5. 5
    Clammerclough CSO

    United Utilities · River Croal

    93spills

Spills over time

The median outlet near Bolton (Bolton) recorded 12.5 spills in 2025, against 11 across England.

136 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 20 recorded more spills, 96 fewer and 20 the same. Together they went from 5,030 to 3,563 spills, a fall of 29%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
20251724,17312.511
20241725,6622019

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 Bolton (Bolton)

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

A6 outlets
B18 outlets
C16 outlets
D5 outlets
E3 outlets
F3 outlets
G5 outlets
H13 outlets
J2 outlets
K2 outlets
L11 outlets
M12 outlets
N4 outlets
O7 outlets
P7 outlets
R8 outlets
S18 outlets
T10 outlets
V1 outlet
W18 outlets
Y2 outlets
Z1 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 E63001109). The latest company reports come from each operator’s live feed and carry their own dates.

All sourcesHow the data worksReport pollution

Questions about Bolton (Bolton)

What area does this Bolton (Bolton) 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 Bolton (Bolton)?
172 outlet records report 4,173 spills in 2025. Every record on this page has a usable count.
Which water companies operate outlets near Bolton (Bolton)?
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 Bolton (Bolton) are linked to a live feed?
165 of the 172 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 7 show annual figures only.
Did any outlet near Bolton (Bolton) record zero spills in 2025?
28 records report zero counted spills in 2025. 22 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 Bolton (Bolton)?
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.