Sewage

Water company · 2025

Yorkshire Water's sewage record

44,401 discharges from 1,985 monitored storm overflows in 2025, for 234,833 hours in total. These are the Environment Agency's published figures.

44,401discharges
234,833hours
188monitors working under 90% of the year

The ten worst overflows

OverflowIntoConstituencyDischargesHours
Marske Sewage Treatment Works Marske Beck Richmond and Northallerton 170 2,046
Eastwood WwTW River Calder Calder Valley 129 2,182
Princess Bridge No 2 CSO River Calder Calder Valley 128 1,650
Ben Rhydding (Ilkley) Wpc Works, St River Wharfe Shipley 127 1,759
Beamsley Wastewater Treatment Works River Wharfe Skipton and Ripon 120 118
Bonegate Lane CSO River Calder Calder Valley 120 737
Thistle Street CSO River Colne Huddersfield 117 1,122
Hull WwTW River Humber Kingston upon Hull East 116 1,560
Hebble Lane CSO Hebble Brook Halifax 116 1,170
Felixkirk Sewage Treatment Works Unnamed Tributary of Whitelass Beck Thirsk and Malton 114 1,401

The constituencies it affects most

  1. Wetherby and Easingwold — 2,501 discharges from 87 overflows
  2. Skipton and Ripon — 2,455 discharges from 89 overflows
  3. Thirsk and Malton — 2,405 discharges from 109 overflows
  4. Calder Valley — 2,222 discharges from 77 overflows
  5. York Central — 1,627 discharges from 54 overflows
  6. Richmond and Northallerton — 1,607 discharges from 59 overflows
  7. Goole and Pocklington — 1,490 discharges from 53 overflows
  8. Colne Valley — 1,477 discharges from 58 overflows
  9. Penistone and Stocksbridge — 1,340 discharges from 39 overflows
  10. Scarborough and Whitby — 1,294 discharges from 73 overflows

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