Sewage Map

Wessex Water sewage map and spill data

Wessex Water operates 1,346 storm overflows listed in the 2025 England annual return, on 722 named receiving waters. Check the latest company report for each outlet below.

1,346
Outlet records
24,442
Spills in 2025
190,666
Recorded hours
1,279
Linked to a live feed

14 records have no usable spill count. 34 records show monitor operation below 90%. Annual figures describe the whole of 2025, not today. Company totals are not a league table.

Waters with the most Wessex Water outlets

Receiving waters named in the annual return, with the number of this company’s outlets on each.

Official annual data ↗Wessex Water 2025 reportHow spills are countedReport pollution

Wessex Water outlets

Filter by the latest company report, or search by outlet, receiving water, town or postcode. 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 1,346 outlets

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  • Abbotsbury B3157 Portesham Road Storm Tank

    Wessex Water · Abbotsbury Brook

    Current status unknown
    2025 annual record:40spills616.9hours
  • Abbotsbury Church Street

    Wessex Water · Mill Stream

    Current status unknown
    2025 annual record:10spills12.5hours
  • Affpuddle

    Wessex Water · Tributary of River Piddle

    Current status unknown
    2025 annual record:0spills0hours
  • Alderbury - Home Farm SPS

    Wessex Water · Tributary of River Avon (S)

    Current status unknown
    2025 annual record:0spills0hours
  • Alderton Inlet

    Wessex Water · Tributary of Luckington Brook(S)

    Current status unknown
    2025 annual record:2spills4.9hours
  • Alford Inlet

    Wessex Water · Tributary of River Brue

    Current status unknown
    2025 annual record:17spills153.8hours
  • All Cannings

    Wessex Water · River Avon (S)

    Current status unknown
    2025 annual record:6spills52.5hours
  • Aller

    Wessex Water · Oxleasedrove Rhyne East

    Current status unknown
    2025 annual record:8spills35.3hours
  • Allington Old Inn

    Wessex Water · River Bourne

    Current status unknown
    2025 annual record:85spills1,977.6hours
  • Almondsbury Storm Tank

    Wessex Water · Sandy Rhine Tributary Chestle Pill

    Current status unknown
    2025 annual record:40spills515.3hours

Most recorded spills in 2025

The highest 2025 counts among Wessex Water outlets. A count is events, not volume or harm. Equal counts share a rank.

  1. 1
    Hurdcott Storm Tank

    River Bourne

    167spills
  2. 2
    Chew Stoke Walley Court Road Storm Tank

    River Chew

    139spills
  3. 3
    Martinstown B3159

    The South Winterbourne(S)

    129spills
  4. 4
    PODIMORE - BEHIND GREYSTONES - Sewage Treatment Works

    Unnamed tributary of the River Cary

    124spills
  5. 5
    Shrewton Storm Tank

    River Till

    116spills

Spills over time

The median outlet run by Wessex Water recorded 11 spills in 2025, against 11 across England.

1,204 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 94 recorded more spills, 969 fewer and 141 the same. Together they went from 41,894 to 22,967 spills, a fall of 45%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
20251,33224,4421111
20241,29543,9312419
20231,24340,1872020
20221,13020,7491213
20211223,6802119
20201809,2644118

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 Wessex Water outlet records

1,346 outlet records in alphabetical order. Each link opens the outlet page with its latest report and annual history.

A19 outlets
B449 outlets
C132 outlets
D28 outlets
E21 outlets
F43 outlets
G21 outlets
H38 outlets
I11 outlets
K19 outlets
L32 outlets
M75 outlets
N20 outlets
O8 outlets
P79 outlets
Q2 outlets
R27 outlets
S123 outlets
T44 outlets
U7 outlets
V3 outlets
W129 outlets
Y16 outlets

Sources and dates

Outlet locations, receiving waters and spill figures come from the Environment Agency 2025 event duration monitoring annual return for England. The latest reports come from the Wessex Water live feed and carry their own dates.

All sourcesCoverage and gapsHow the data works

Questions about Wessex Water

What do the Wessex Water figures cover?
This page totals 1,332 outlet records with a usable 2025 spill count, out of 1,346 records in the England dataset. Missing values are not counted as zero.
How many Wessex Water outlets are linked to a live feed?
1,279 records are matched to a monitor in the company live feed. A link does not mean the monitor is working now. Use the status filters above to see the latest report and its date. 67 records have annual figures only.
How many Wessex Water outlets recorded zero spills in 2025?
220 records report zero counted spills. 34 records have monitor operation below 90%, so a zero from one of those outlets may not cover the whole year.
Does a recorded spill show how much sewage was discharged?
No. Event duration monitors report when an overflow operated. They do not measure the volume released or the water quality.
Can I compare Wessex Water with another company?
Take care. 34 records have monitor operation below 90%, and companies differ in outlet numbers and area. Check missing values and monitor coverage before making a comparison.
How do I report pollution from a Wessex Water outlet?
Use the official pollution reporting route in our guide. Give the outlet name, permit reference and the time you saw the problem. Sewage Map does not send incident reports.