Sewage Map

Marden - source to conf Cowage Bk sewage map and spill data

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

12
Outlet records
164
Spills in 2025
1,118
Recorded hours
12
Linked to a live feed

Annual figures describe the whole of 2025, not today.

Official waterbody record ↗How spills are countedSearch the national map

Outlets on Marden - source to conf Cowage Bk

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 12 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
    Calne Mosses Mill 2

    Wessex Water

    44spills
  2. 2
    Calne Storm Tank

    Wessex Water

    26spills
  3. 3
    Calne Rough Leaze

    Wessex Water

    23spills
  4. 4
    Calne Inlet

    Wessex Water

    21spills
  5. 5
    Compton Bassett Storm Tank

    Wessex Water

    16spills

Spills over time

The median outlet on Marden - source to conf Cowage Bk recorded 11 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. 0 recorded more spills, 11 fewer and 0 the same. Together they went from 311 to 152 spills, a fall of 51%.

YearOutlets with a countTotal spillsMedian per outletEngland median
2025121641111
2024123603319
20231232627.520
202261051813
202123718.519
20202904518

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 Marden - source to conf Cowage Bk

12 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: GB109053022050. The official waterbody record is a source lookup; its classification is not imported here.

All sourcesHow the data worksReport pollution

Questions about Marden - source to conf Cowage Bk

Which outlets are linked to Marden - source to conf Cowage Bk?
The source links 12 outlet records to waterbody GB109053022050. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Marden - source to conf Cowage Bk?
12 records report 164 spills in 2025 and 1,118 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 Marden - source to conf Cowage Bk?
Wessex Water operates every listed outlet. Contact the operator or the official pollution service if you see a problem in the water.
Which outlets on Marden - source to conf Cowage Bk are linked to a live feed?
12 of the 12 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 Marden - source to conf Cowage Bk?
Every record with a monitor operation figure shows 90% or more for 2025.
Does this show if Marden - source to conf Cowage Bk is safe?
No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.