Leamside Sewage Treatment Works
Storm overflow operated by Northumbrian Water. The source names River Wear as the receiving water.
- 37
- Spills in 2025
- 416.8
- Recorded hours
- 60.8%
- Monitor operation
- 2
- Years listed
Checking the latest monitor report…
How it compares in 2025
Leamside Sewage Treatment Works recorded 37 spills in 2025. That is more than 80% of the 14,239 overflows in England with a reported figure, and ranks 2,695th nationally. Among Northumbrian Water overflows it ranks 246th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Wear from Croxdale Beck to Lumley Park Burn waterbody it ranks 6th of 46.
The monitor worked for 60.8% of 2025, so this count may be low and its rank may understate activity.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 37 | 416.8 |
| England | 2,695th of 14,239 | 11 | 22.3 |
| Northumbrian Water | 246th of 1,559 | 11 | 15.6 |
| Wear from Croxdale Beck to Lumley Park Burn | 6th of 46 | 5 | 5.3 |
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 | 37 | 416.8 hours | 60.8%Low coverage | Official data |
| 2024 | 10 | 123.2 hours | 30%Low coverage | 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
- 245/1271
- Activity reference
- A2
- Grid reference
- NZ2971146647
- Waterbody ID
- GB103024077621Official 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 2.2 km west of the West Rainton reference point in the ONS built-up areas data.
Area and water pages
- Birtley area →
- Urpeth area →
- Pelton and Ouston area →
- Whitehill (County Durham) area →
- Sacriston area →
- Nettlesworth and Kimblesworth area →
- Chester-le-Street area →
- Durham area →
- Newfield area →
- Great Lumley area →
- West Pelton area →
- Fence Houses area →
- Houghton-le-Spring area →
- High Pittington area →
- Penshaw area →
- Witton Gilbert area →
- Craghead area →
- East Rainton area →
- Ushaw Moor and Bearpark area →
- Sherburn (County Durham) area →
- West Rainton area →
- Bournmoor area →
- Shiney Row and Penshaw area →
- Brandon (County Durham) area →
- Langley Park area →
- Hetton le Hill area →
- Sherburn Hill area →
- Croxdale area →
- Hetton-le-Hole area →
- High Shincliffe area →
- Easington Lane area →
- Shadforth area →
- New Brancepeth area →
- Bowburn area →
- Wear from Croxdale Beck to Lumley Park 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
- Leamside CSOCurrent status unknown
Northumbrian Water · Wear
- Finchale View CSOCurrent status unknown
Northumbrian Water · Wear Tributary
- Pithouse Lane CSO (West Rainton 5)Current status unknown
Northumbrian Water · Unnamed Tributary of River Wear
- West Rainton CSO Du085Current status unknown
Northumbrian Water · Wear
Questions about Leamside Sewage Treatment Works
- Who operates Leamside Sewage Treatment Works?
- Northumbrian Water is the operator named in the annual record. The permit reference is 245/1271.
- Where does Leamside Sewage Treatment Works discharge?
- The source names River Wear as the receiving water. This does not show how far a discharge travelled.
- How many times did Leamside Sewage Treatment Works spill in 2025?
- The 2025 return records 37 counted spill events and 416.8 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 60.8% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
- Is Leamside Sewage Treatment Works 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 Leamside Sewage Treatment Works?
- 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 Leamside Sewage Treatment Works compare with other overflows?
- Leamside Sewage Treatment Works recorded 37 spills in 2025. That is more than 80% of the 14,239 overflows in England with a reported figure, and ranks 2,695th nationally. Among Northumbrian Water overflows it ranks 246th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Wear from Croxdale Beck to Lumley Park Burn waterbody it ranks 6th of 46. 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.