Sewage Map

Bollin (Source to Dean) sewage map and spill data

15 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.

15
Outlet records
334
Spills in 2025
861
Recorded hours
15
Linked to a live feed

1 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 Bollin (Source to Dean)

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 15 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
    18/20 Beech Farm Drive CSO

    United Utilities

    66spills
  2. 2
    Westminster Road CSO

    United Utilities

    61spills
  3. 3
    MACCLESFIELD WwTW

    United Utilities

    56spills
  4. 4
    Chancel Lane CSO

    United Utilities

    45spills
  5. 5
    Roewoods Outfall Sewer (27206) (MAC0028)

    United Utilities · monitor coverage 88.1%, below 90%

    31spills

Spills over time

The median outlet on Bollin (Source to Dean) recorded 9 spills in 2025, against 11 across England.

11 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 7 recorded more spills, 4 fewer and 0 the same. Together they went from 320 to 233 spills, a fall of 27%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
202515334911
202415428619

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 Bollin (Source to Dean)

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

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: GB112069061320. The official waterbody record is a source lookup; its classification is not imported here.

All sourcesHow the data worksReport pollution

Questions about Bollin (Source to Dean)

Which outlets are linked to Bollin (Source to Dean)?
The source links 15 outlet records to waterbody GB112069061320. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Bollin (Source to Dean)?
15 records report 334 spills in 2025 and 861 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 Bollin (Source to Dean)?
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 Bollin (Source to Dean) are linked to a live feed?
15 of the 15 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 Bollin (Source to Dean)?
1 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 Bollin (Source to Dean) is safe?
No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.