The Middles CSO
Storm overflow operated by Northumbrian Water. The source names Stanley Burn Tributary as the receiving water.
- 54
- Spills in 2025
- 86.3
- Recorded hours
- 98.3%
- Monitor operation
- 2
- Years listed
The reported spill count was 12 lower than in 2024. This compares event counts, not discharge volume.
We do not have a live report for this outlet. Its annual spill records are shown below.
How it compares in 2025
The Middles CSO recorded 54 spills in 2025. That is more than 89% of the 14,239 overflows in England with a reported figure, and ranks 1,394th nationally. Among Northumbrian Water overflows it ranks 94th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Twizell Burn from Source to Cong Burn waterbody it ranks 3rd of 17.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 54 | 86.3 |
| England | 1,394th of 14,239 | 11 | 22.3 |
| Northumbrian Water | 94th of 1,559 | 11 | 15.6 |
| Twizell Burn from Source to Cong Burn | 3rd of 17 | 17 | 18 |
Rank 1 has the most spills. Equal counts share a rank. Only overflows with a reported count are ranked. Counts do not measure volume, so a higher rank does not mean more sewage.
Annual spill history
| Year | Spills | Duration | Monitor operation | Source |
|---|---|---|---|---|
| 2025 | 54 | 86.3 hours | 98.3% | Official data |
| 2024 | 66 | 286.4 hours | 97.3% | Official data |
A missing figure means the source did not provide a usable value. A zero is shown as zero. Monitor operation below 90% can make comparison less reliable.
Outlet details
- Water company
- Northumbrian Water
- Outlet type
- Storm overflow on the sewer network
- Permit
- 245/1148
- Activity reference
- A1
- Grid reference
- NZ2073351684
- Waterbody ID
- GB103024077590Official waterbody record ↗
- Location source
- Official annual grid reference
- Location precision
- About 1 metres
- Location note
- Unknown
About the name and type
The annual return lists this asset as “SO on sewer network”: storm overflow on the sewer network. The return places this overflow on the sewer network.
The waterbody link opens the Environment Agency record for the exact ID in the return. It is a source lookup; we do not import its classification.
Where it is
The recorded position is about 1.1 km south-east of the Stanley (County Durham) reference point in the ONS built-up areas data.
Area and water pages
- Kibblesworth area →
- Birtley area →
- Urpeth area →
- Whickham area →
- Sunniside area →
- Pelton and Ouston area →
- Burnopfield area →
- Beamish area →
- Whitehill (County Durham) area →
- Hobson area →
- Tanfield Lea area →
- Sacriston area →
- Nettlesworth and Kimblesworth area →
- Tantobie area →
- Chester-le-Street area →
- Rowlands Gill area →
- Newfield area →
- Great Lumley area →
- West Pelton area →
- Witton Gilbert area →
- Craghead area →
- Ushaw Moor and Bearpark area →
- Hamsterley Mill area →
- Stanley (County Durham) area →
- Langley Park area →
- Dipton area →
- Annfield Plain area →
- Twizell Burn from Source to Cong Burn waterbody →
Check the official record
Public access to this outlet is unknown. Do not enter restricted land or use this page as a route guide.
Open official source ↗Other outlet records nearby
- Durham Road CSOCurrent status unknown
Northumbrian Water · Stanley Burn Tributary
- Nightingale Place CSOCurrent status unknown
Northumbrian Water · Stanley Burn, Tributary of
- 50 Woodside Gardens CSOCurrent status unknown
Northumbrian Water · Stanley Burn Tributary
- Holyhill Gardens East CSOCurrent status unknown
Northumbrian Water · Stanley Burn
Questions about The Middles CSO
- Who operates The Middles CSO?
- Northumbrian Water is the operator named in the annual record. The permit reference is 245/1148.
- Where does The Middles CSO discharge?
- The source names Stanley Burn Tributary as the receiving water. This does not show how far a discharge travelled.
- How many times did The Middles CSO spill in 2025?
- The 2025 return records 54 counted spill events and 86.3 hours of recorded discharge. Spills are counted with the 12/24-hour method, so this is not a count of every start signal.
- Can I trust the 2025 figures for this outlet?
- The monitor worked for 98.3% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is The Middles CSO discharging right now?
- This record is not matched to a company live feed, so we cannot show a current report. Only the annual figures are available for this outlet.
- How accurate is the map marker?
- The marker comes from the grid reference in the official annual return, which is accurate to about 1 metres. It shows the recorded outlet position, not the extent of any discharge.
- What kind of outlet is The Middles CSO?
- The annual return lists the asset type as “SO on sewer network”, which means storm overflow on the sewer network. The return places this overflow on the sewer network.
- How does The Middles CSO compare with other overflows?
- The Middles CSO recorded 54 spills in 2025. That is more than 89% of the 14,239 overflows in England with a reported figure, and ranks 1,394th nationally. Among Northumbrian Water overflows it ranks 94th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Twizell Burn from Source to Cong Burn waterbody it ranks 3rd of 17. Ranks compare counted spill events only. They do not compare volume or harm.
- Does zero spills mean the water was safe?
- No. A zero means the annual return recorded zero counted spill events for this outlet and year. It is not a water-quality test, and pollution can come from other sources.