Sewage

Water company · 2025

Severn Trent Water's sewage record

34,752 discharges from 2,377 monitored storm overflows in 2025, for 187,776 hours in total. These are the Environment Agency's published figures.

34,752discharges
187,776hours
105monitors working under 90% of the year

The ten worst overflows

OverflowIntoConstituencyDischargesHours
Lydney Sewage Treatment Works River Severn Estuary Forest of Dean 178 1,476
Church Stretton STW Tributary of Quinny Brook South Shropshire 162 3,257
Blakeney STW (Ssto) River Severn Forest of Dean 153 1,579
Warslow Sewage Treatment Works Warslow Brook Staffordshire Moorlands 152 2,007
Mill Street CSO Tributary of Sidleymoor Brook North Shropshire 151 325
The Crescent CSO Bradwell Brook Derbyshire Dales 127 1,394
Sutton On Trent (Cromwell) WwTW River Trent Newark 125 1,601
Snarestone Sewage Treatment Works River Mease Hinckley and Bosworth 121 1,969
Matlock Bath - Dale Road (Coal Me- River Derwent Derbyshire Dales 118 977
Avening Sewage Treatment Works Nailsworth Stream South Cotswolds 113 759

The constituencies it affects most

  1. Derbyshire Dales — 2,746 discharges from 100 overflows
  2. Amber Valley — 1,314 discharges from 78 overflows
  3. Forest of Dean — 975 discharges from 34 overflows
  4. Shrewsbury — 973 discharges from 56 overflows
  5. South Shropshire — 931 discharges from 47 overflows
  6. Mid Derbyshire — 874 discharges from 50 overflows
  7. Hinckley and Bosworth — 808 discharges from 52 overflows
  8. Staffordshire Moorlands — 792 discharges from 30 overflows
  9. Kenilworth and Southam — 783 discharges from 39 overflows
  10. West Worcestershire — 771 discharges from 43 overflows

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