Edmondsley STW
Storm overflow operated by Northumbrian Water. The source names Little Burn, Tributary of Cong Burn as the receiving water.
- 45
- Spills in 2025
- 519.9
- Recorded hours
- 99.9%
- Monitor operation
- 2
- Years listed
The reported spill count was 16 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Edmondsley STW recorded 45 spills in 2025. That is more than 85% of the 14,239 overflows in England with a reported figure, and ranks 1,994th nationally. Among Northumbrian Water overflows it ranks 152nd of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Cong Burn from Source to Twizell Burn waterbody it ranks 1st of 6.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 45 | 519.9 |
| England | 1,994th of 14,239 | 11 | 22.3 |
| Northumbrian Water | 152nd of 1,559 | 11 | 15.6 |
| Cong Burn from Source to Twizell Burn | 1st of 6 | 14.5 | 7.9 |
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 | 45 | 519.9 hours | 99.9% | Official data |
| 2024 | 61 | 699.7 hours | 99.1% | 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 tank at a wastewater treatment works
- Permit
- 245/0839
- Activity reference
- A2
- Grid reference
- NZ2375950175
- Waterbody ID
- GB103024077560Official 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 “Storm tank at WwTW”: storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works.
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 1.9 km south-west of the Whitehill (County Durham) reference point in the ONS built-up areas data.
Area and water pages
- Kibblesworth area →
- Springwell area →
- Birtley area →
- Urpeth area →
- Washington 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 →
- Durham area →
- Newfield area →
- Great Lumley area →
- West Pelton area →
- Fence Houses area →
- Penshaw area →
- Witton Gilbert area →
- Craghead area →
- East Rainton area →
- Ushaw Moor and Bearpark area →
- West Rainton area →
- Bournmoor area →
- Stanley (County Durham) area →
- Shiney Row and Penshaw area →
- Langley Park area →
- Dipton area →
- New Brancepeth area →
- Annfield Plain area →
- Cong Burn from Source to Twizell 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
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Northumbrian Water · Cong Burn
- Beechville CSOCurrent status unknown
Northumbrian Water · Cong Burn
- Waldridge Road CSO Ch 13Current status unknown
Northumbrian Water · Cong Burn
- Grange Villa CSOCurrent status unknown
Northumbrian Water · Blindy Burn
Questions about Edmondsley STW
- Who operates Edmondsley STW?
- Northumbrian Water is the operator named in the annual record. The permit reference is 245/0839.
- Where does Edmondsley STW discharge?
- The source names Little Burn, Tributary of Cong Burn as the receiving water. This does not show how far a discharge travelled.
- How many times did Edmondsley STW spill in 2025?
- The 2025 return records 45 counted spill events and 519.9 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 99.9% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Edmondsley STW discharging right now?
- This record is linked to a company live feed. The panel above shows the latest report we hold, with its date. That report can be old, and the monitor can be offline, so check the date before relying on it. A report that no discharge is taking place is not a water-quality result.
- 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 Edmondsley STW?
- The annual return lists the asset type as “Storm tank at WwTW”, which means storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works.
- How does Edmondsley STW compare with other overflows?
- Edmondsley STW recorded 45 spills in 2025. That is more than 85% of the 14,239 overflows in England with a reported figure, and ranks 1,994th nationally. Among Northumbrian Water overflows it ranks 152nd of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Cong Burn from Source to Twizell Burn waterbody it ranks 1st of 6. 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.