Sewage

Water company · 2025

Northumbrian Water's sewage record

25,771 discharges from 1,499 monitored storm overflows in 2025, for 115,524 hours in total. These are the Environment Agency's published figures.

25,771discharges
115,524hours
195monitors working under 90% of the year

The ten worst overflows

OverflowIntoConstituencyDischargesHours
Cotherstone STW River Balder Bishop Auckland 161 2,197
Glasshouse Street Ps River Tyne, North Sea Newcastle upon Tyne East and Wallsend 128 1,353
Tyneside CSO (No B5/301) Don Jarrow and Gateshead East 121 491
Howdon STW River Tyne Saline Estuary Tynemouth 120 1,238
Otterburn STW River Rede Hexham 120 1,816
Moorsholm Sewage Treatment Works Hagg Beck (Kilton Beck Tributary) Middlesbrough South and East Cleveland 113 587
Felton STW Coquet North Durham 109 1,454
Western Area STW River Wear Bishop Auckland 107 1,822
Allendale STW River East Allen Hexham 106 1,865
Bluehouse Gill CSO Bluehouse Gill (North Sea) Easington 104 931

The constituencies it affects most

  1. North Northumberland — 3,414 discharges from 160 overflows
  2. Bishop Auckland — 2,763 discharges from 141 overflows
  3. Hexham — 2,090 discharges from 118 overflows
  4. City of Durham — 2,052 discharges from 115 overflows
  5. North Durham — 1,557 discharges from 93 overflows
  6. Blaydon and Consett — 1,226 discharges from 93 overflows
  7. Gateshead Central and Whickham — 1,105 discharges from 49 overflows
  8. Newton Aycliffe and Spennymoor — 992 discharges from 63 overflows
  9. Newcastle upon Tyne East and Wallsend — 958 discharges from 41 overflows
  10. Jarrow and Gateshead East — 894 discharges from 50 overflows

If you are a Northumbrian Water customer, you cannot switch supplier, but you can claim compensation when they miss a legal standard. What you are owed →

Other companies: Anglian Water · Dwr Cymru Welsh Water · Hafren Dyfrdwy · Severn Trent Water · South West Water · Southern Water · Thames Water · United Utilities · Wessex Water · Yorkshire Water