Sewage

Water company · 2025

Southern Water's sewage record

14,618 discharges from 917 monitored storm overflows in 2025, for 109,900 hours in total. These are the Environment Agency's published figures.

14,618discharges
109,900hours
110monitors working under 90% of the year

The ten worst overflows

OverflowIntoConstituencyDischargesHours
Lavant WwTW River Lavant & Gw Via Wetland Chichester 166 3,583
Lidsey WwTW Lidsey Rife Arundel and South Downs 157 2,407
Ham Lane Lewes Settles Storm Tank The Tidal River Ouse Lewes 155 2,485
Kings Somborne WwTW Tributary of the River Test Romsey and Southampton North 125 2,801
Hammerwood Road Ashurst Wood Wps Shovelstrode Stream Sussex Weald 104 2,283
West Wellow WwTW River Blackwater New Forest East 101 1,303
Bexhill and Hastings WwTW English Channel — 99 818
Burwash Common STW River Dudwell Bexhill and Battle 99 1,302
Littlehampton Wwps Controlled Sea — 97 748
South Harting WwTW Unnamed Tributary of River Rother Arundel and South Downs 97 2,201

The constituencies it affects most

  1. Sussex Weald — 1,258 discharges from 50 overflows
  2. Arundel and South Downs — 1,245 discharges from 36 overflows
  3. Isle of Wight West — 1,237 discharges from 52 overflows
  4. Bexhill and Battle — 823 discharges from 45 overflows
  5. Weald of Kent — 711 discharges from 36 overflows
  6. East Grinstead and Uckfield — 684 discharges from 41 overflows
  7. Lewes — 670 discharges from 31 overflows
  8. Tunbridge Wells — 620 discharges from 32 overflows
  9. Isle of Wight East — 618 discharges from 44 overflows
  10. Mid Sussex — 562 discharges from 26 overflows

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