Sewage

Water company · 2025

United Utilities's sewage record

57,988 discharges from 2,149 monitored storm overflows in 2025, for 312,482 hours in total. These are the Environment Agency's published figures.

57,988discharges
312,482hours
181monitors working under 90% of the year

The ten worst overflows

OverflowIntoConstituencyDischargesHours
Lock Lane Partington CSO Manchester Ship Canal Stretford and Urmston 217 1,574
Blennerhasset Ww Pumping Station River Ellen Penrith and Solway 172 2,508
Braystones WwTW Irish Sea Whitehaven and Workington 168 1,082
Staveley WwTW River Kent Westmorland and Lonsdale 167 3,395
Wallasey Ww Pumping Station River Mersey Estuary Wallasey 164 769
North Wirral WwTW River Birket Wirral West 164 833
Plumbland WwTW River Ellen Penrith and Solway 164 1,928
Great Broughton WwTW River Derwent Penrith and Solway 161 1,427
Crosby Garret WwTW Crosby Garrett Beck Westmorland and Lonsdale 159 1,922
Pica STW Dyan Beck Whitehaven and Workington 152 2,589

The constituencies it affects most

  1. Penrith and Solway — 6,366 discharges from 137 overflows
  2. Westmorland and Lonsdale — 3,842 discharges from 74 overflows
  3. Whitehaven and Workington — 2,651 discharges from 63 overflows
  4. Barrow and Furness — 2,281 discharges from 57 overflows
  5. Ribble Valley — 2,155 discharges from 50 overflows
  6. Morecambe and Lunesdale — 1,523 discharges from 46 overflows
  7. High Peak — 1,316 discharges from 39 overflows
  8. Rossendale and Darwen — 1,304 discharges from 66 overflows
  9. Carlisle — 1,280 discharges from 48 overflows
  10. Tatton — 1,229 discharges from 42 overflows

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