Sewage Map

Chichester Harbour sewage map and spill data

10 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.

10
Outlet records
125
Spills in 2025
1,504
Recorded hours
10
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 Chichester Harbour

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 10 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
    Chichester WTW 1 SSO - 115402

    Southern Water

    62spills
  2. 2
    Bosham SSO - 115735

    Southern Water

    22spills
  3. 3
    Priors Leaze Lane Nutbourne CSO - 111267

    Southern Water

    19spills
  4. 4
    Old Portsmouth Road CSO - 111371

    Southern Water

    8spills
  5. 5
    Chichester WTW 2 SSO - 115401

    Southern Water

    4spills

Spills over time

The median outlet on Chichester Harbour recorded 3.5 spills in 2025, against 11 across England.

10 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 1 recorded more spills, 8 fewer and 1 the same. Together they went from 273 to 125 spills, a fall of 54%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
2025101253.511
20241027320.519
2023825923.520
20228106613
20218773.519
202015518

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 Chichester Harbour

10 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: GB580705210000. The official waterbody record is a source lookup; its classification is not imported here.

All sourcesHow the data worksReport pollution

Questions about Chichester Harbour

Which outlets are linked to Chichester Harbour?
The source links 10 outlet records to waterbody GB580705210000. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Chichester Harbour?
10 records report 125 spills in 2025 and 1,504 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 Chichester Harbour?
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 Chichester Harbour are linked to a live feed?
10 of the 10 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 Chichester Harbour?
Every record with a monitor operation figure shows 90% or more for 2025.
Does this show if Chichester Harbour is safe?
No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.