Sewage Map

Avon (Brist) conf R Marden to conf Semington Bk sewage map and spill data

25 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.

25
Outlet records
410
Spills in 2025
2,886
Recorded hours
21
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 Avon (Brist) conf R Marden to conf Semington 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 25 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
    Chippenham Bristol Road

    Wessex Water

    53spills
  2. 2
    Melksham Inlet

    Wessex Water

    51spills
  3. 3
    CHIPPENHAM - HIGH STREET O/S 6 - Combined Sewer Overflow

    Wessex Water

    47spills
  4. 4
    Chippenham Gastons Road

    Wessex Water

    46spills
  5. 5
    Chippenham Blackwell Hams Storm Tank

    Wessex Water

    39spills

Spills over time

The median outlet on Avon (Brist) conf R Marden to conf Semington Bk recorded 6 spills in 2025, against 11 across England.

19 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 0 recorded more spills, 19 fewer and 0 the same. Together they went from 831 to 404 spills, a fall of 51%.

YearOutlets with a countTotal spillsMedian per outletEngland median
202525410611
2024228443519
2023217292420
20221636420.513
202161031419
2020616226.518

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 Avon (Brist) conf R Marden to conf Semington Bk

25 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: GB109053027440. The official waterbody record is a source lookup; its classification is not imported here.

All sourcesHow the data worksReport pollution

Questions about Avon (Brist) conf R Marden to conf Semington Bk

Which outlets are linked to Avon (Brist) conf R Marden to conf Semington Bk?
The source links 25 outlet records to waterbody GB109053027440. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Avon (Brist) conf R Marden to conf Semington Bk?
25 records report 410 spills in 2025 and 2,886 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 Avon (Brist) conf R Marden to conf Semington 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 Avon (Brist) conf R Marden to conf Semington Bk are linked to a live feed?
21 of the 25 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 Avon (Brist) conf R Marden to conf Semington Bk?
Every record with a monitor operation figure shows 90% or more for 2025.
Does this show if Avon (Brist) conf R Marden to conf Semington 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.