Sewage Map

Southampton Water sewage map and spill data

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

39
Outlet records
368
Spills in 2025
2,519
Recorded hours
36
Linked to a live feed

2 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 Southampton Water

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 39 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
    Hungerford Bottom Bursledon CEO - 108446

    Southern Water

    41spills
  2. 2
    Portswood SSO - 115428

    Southern Water

    36spills
  3. 3
    Salterns Lane Bursledon CEO - 108879

    Southern Water

    35spills
  4. 4
    Hamble Lane Bursledon CEO - 113675

    Southern Water

    29spills
  5. 5
    Millbrook SSO - 115420

    Southern Water

    28spills

Spills over time

The median outlet on Southampton Water recorded 5 spills in 2025, against 11 across England.

35 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 3 recorded more spills, 25 fewer and 7 the same. Together they went from 858 to 338 spills, a fall of 61%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
202539368511
202439912819
202337957820
2022364193.513
202137401419
20201545418

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 Southampton Water

39 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: GB520704202800. The official waterbody record is a source lookup; its classification is not imported here.

All sourcesHow the data worksReport pollution

Questions about Southampton Water

Which outlets are linked to Southampton Water?
The source links 39 outlet records to waterbody GB520704202800. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Southampton Water?
39 records report 368 spills in 2025 and 2,519 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 Southampton Water?
Southern Water operates every listed outlet. Contact the operator or the official pollution service if you see a problem in the water.
Which outlets on Southampton Water are linked to a live feed?
36 of the 39 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 Southampton Water?
2 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 Southampton Water is safe?
No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.